隨著航空燃料需求日益增加，以及有機廢棄物資源化利用受到重視，如何將高含氮之污水污泥轉化為具燃料價值之液態產物已成為重要研究課題。本研究以污水污泥(SS)與咖啡渣( SCG)為原料，探討其共熱裂解製備航空燃料前驅物之可行性，並評估催化改質對油品品質之影響。本研究首先進行原料性質分析、熱重分析、協同效應分析及活化能分析，以瞭解污水污泥與咖啡渣之熱裂解特性。結果顯示，咖啡渣具有較高揮發份與熱值，而共裂解過程中兩種原料間存在明顯協同效應，可促進有機物分解並降低反應活化能。後續利用管狀熱裂解系統進行共裂解實驗，並以氣相層析質譜儀(GC-MS)分析裂解油組成，探討不同操作條件對油品品質之影響。研究結果顯示，共裂解可有效改善污水污泥裂解油之品質，提高C8-C16化合物(C8-C16)比例並降低 C>16化合物比例，有助於提升裂解油作為永續航空燃料前驅物之潛力。為進一步評估油品品質，本研究建立C8-C16燃料指標(MCFI)與燃料升級負擔指標(FUBI)，並結合Box-Behnken Design(BBD)進行操作條件最佳化。結果顯示，最佳操作條件為熱裂解溫度525°C、SS混摻比40%及氮氣流率600 mL/min。在此條件下，MCFI為71.8；進一步添加 Fe+CaO+ZSM-5 複合催化劑後，MCFI提升至93.5，而FUBI則由84.25下降至66.88，顯示催化改質可有效提高C8-C16燃料前驅物比例，並降低後續燃料升級負擔。綜合分析結果，本研究證實污水污泥與咖啡渣共熱裂解，並搭配 Fe+CaO+ZSM-5 進行複合催化改質，可有效提升裂解油品質與C8-C16燃料前驅物比例，且減少後續燃料升級的負擔，具有作為永續航空燃料前驅物開發之潛力。

This study investigated the co-pyrolysis of sewage sludge (SS) and spent coffee grounds (SCG) to produce sustainable aviation fuel (SAF) precursors and evaluated catalytic upgrading of bio-oil. Feedstock characterization, thermogravimetric analysis (TGA), synergistic analysis, and kinetic analysis were conducted to examine the thermal decomposition behavior of SS and SCG. SCG exhibited higher volatile matter and heating value than SS, while co-pyrolysis showed positive synergistic effects and reduced activation energy compared with pure SS. Pyrolysis experiments were subsequently conducted using a tubular system, and the resulting bio-oil was characterized by gas chromatography–mass spectrometry (GC–MS). Increasing the SCG ratio increased the oil yield from 9.97 to 15.25 wt.% and shifted the carbon-number distribution toward C8-C16 compounds while reducing C>16 compounds. The Middle-Carbon Fuel Index (MCFI) and Fuel Upgrading Burden Index (FUBI) were used with a Box–Behnken Design (BBD) to evaluate and optimize bio-oil quality. The optimal MCFI conditions were 525 °C, an SS blending ratio of 40%, and an N₂ flow rate of 600 mL/min, resulting in an MCFI of 71.8. After applying an Fe + CaO + ZSM-5 composite catalyst, the MCFI increased to 93.5, while the FUBI decreased from 84.25 to 66.88. Overall, co-pyrolysis combined with catalytic upgrading improved the fuel--relevant characteristics of bio-oil, demonstrating its potential as a waste-derived SAF precursor.

[1]X. Zhang, S. Hu, M. A. Naeem, and A. Rauf, "Climate change vulnerability and the resilience of energy consumption," World Development, vol. 201, 2026, doi: 10.1016/j.worlddev.2026.107316.
[2]B. B. Alagoz, C. Keles, and B. Baran, "A note on effects of fossil fuel reduction policies on atmospheric carbon dioxide buildup and global warming," Journal of Atmospheric and Solar-Terrestrial Physics, vol. 279, 2026, doi: 10.1016/j.jastp.2026.106724.
[3]ICAO, "ICAO LTAG Report-AppendixM5," 2022.
[4]IEA, "<ReFuel Aviation>," 2024.
[5]R. Khalifa, M. Alherbawi, and A. Elomri, "Alternative fuels’ blending model to facilitate the implementation of carbon offsetting and reduction Scheme for International Aviation," Fuel, vol. 326, 2022, doi: 10.1016/j.fuel.2022.124974.
[6]EU, "<the promotion of the use of energy from renewable sources>," 2018.
[7]S. S. Doliente, A. Narayan, and J. F. D. Tapia, "Bio-aviation Fuel: A Comprehensive Review and Analysis of the Supply Chain Components," Frontiers in Energy Research, vol. 8, 2020, doi: 10.3389/fenrg.2020.00110.
[8]T. Lee, S. Jung, and S. Lee, "Production of aviation fuel via thermal cracking of plastic waste," Energy Conversion and Management, vol. 315, 2024, doi: 10.1016/j.enconman.2024.118827.
[9]E. Gyandoh and J. Gomez, "Techno-Economic Analysis (TEA) of Civilian Sustainable Aviation Fuel (SAF) – A systematic review of Hydrotreated Esters and Fatty Acids (HEFA) and Lignocellulosic Biomass Conversion (LCBC) Strategies," Applied Energy, vol. 399, 2025, doi: 10.1016/j.apenergy.2025.126421.
[10] A. Mukhtar, E. Agyekum-Oduro, and S. Saqib, "Strategies to enhance the (C9-C16) range sustainable aviation fuel selectivity in Fischer-Tropsch synthesis," Catalysis Today, vol. 463, 2026, doi: 10.1016/j.cattod.2025.115606.
[11] D.-S. Kourkoumpas and A. Sagani, "Life cycle assessment of an innovative alcohol-to-jet process: The case for retrofitting a bioethanol plant for sustainable aviation fuel production," Renewable Energy, vol. 228, 2024, doi: 10.1016/j.renene.2024.120512.
[12] I. Abrantes, A. F. Ferreira, and A. Silva, "Sustainable aviation fuels and imminent technologies - CO2 emissions evolution towards 2050," Journal of Cleaner Production, vol. 313, 2021, doi: 10.1016/j.jclepro.2021.127937.
[13] A. Maghzian and J. John Saddler, "Which processes to making biojet/Sustainable Aviation Fuel (SAF) are likely to supplement the predominant, HEFA/lipid-to-biojet production route?," Bioresour Technol, vol. 441, p. 133631, Feb 2026, doi: 10.1016/j.biortech.2025.133631.
[14] IEA. <Global total commercial air passenger traffic>
[15] IATA, "<Global Air Travel Demand Continued Its Bounce Back in 2023>," 2024.
[16] IEA. <CO2 emissions in aviation in the Net Zero Scenario>
[17] ICAO, "<Carbon Offsetting and Reduction Scheme for International Aviation, CORSIA>," 2025.
[18] IATA, "International Air Transport Association (IATA), "Fact sheet: What is SAF?."
[19] A. Mohanty, A. Ramasamy, and R. verayiah, "Sustainable aviation fuels from bio resources: Technological pathways, prospects, and deployment challenges," Sustainable Energy Technologies and Assessments, vol. 83, 2025, doi: 10.1016/j.seta.2025.104642.
[20] Z. Luo, W. Zhu, and F. Miao, "Catalytic hydrodeoxygenation of pyrolysis bio-oil to jet fuel: A review," Frontiers in Energy, vol. 18, no. 5, pp. 550–582, 2024, doi: 10.1007/s11708-024-0943-7.
[21] T. N. O. Mensah, A. S. Oyewo, and Breyer, "The global sustainable bioenergy potential until 2050 in global-national resolution," Applied Energy, vol. 400, 2025, doi: 10.1016/j.apenergy.2025.126464.
[22] IEA, "<IEA Bioenergy>," 2024.
[23] M. Hu, H. Hu, and Z. Ye, "A review on turning sewage sludge to value-added energy and materials via thermochemical conversion towards carbon neutrality," Journal of Cleaner Production, vol. 379, 2022, doi: 10.1016/j.jclepro.2022.134657.
[24] A. Olasupo, B. Ishola, and Ajiboye, "Sewage sludge: a source of renewable energy and resources for circular bioeconomy," Chemical Engineering Journal: Green and Sustainable, vol. 1, 2026, doi: 10.1016/j.cejgas.2025.100015.
[25] Y.-C. Chen and J. Kuo, "Potential of greenhouse gas emissions from sewage sludge management: a case study of Taiwan," Journal of Cleaner Production, vol. 129, pp. 196–201, 2016, doi: 10.1016/j.jclepro.2016.04.084.
[26] Eurstat. <Sewage sludge production and disposal>
[27] 行政院環境部資源循環屬, "<113年事業廢棄物申報量統計報告>," 2025.
[28] ICO, "<annual review 2023 2024 e>," 2025.
[29] 財政部統計處, "<咖啡服務產業（財政統計通報第2號）臺北市：財政部統計處>," 2025.
[30] N. Zhao, Z. Liu, and T. Yu, "Spent coffee grounds: Present and future of environmentally friendly applications on industries-A review," Trends in Food Science & Technology, vol. 143, 2024, doi: 10.1016/j.tifs.2023.104312.
[31] R. Q. Mensah, P. Tantayotai, K. Rattanaporn, and Chuetor, "Properties and applications of green-derived products from spent coffee grounds – Steps towards sustainability," Bioresource Technology Reports, vol. 26, 2024, doi: 10.1016/j.biteb.2024.101859.
[32] J. Gu, A. Lee, and C. Choe, "Comparative study of biofuel production based on spent coffee grounds transesterification and pyrolysis: Process simulation, techno-economic, and life cycle assessment," Journal of Cleaner Production, vol. 428, 2023, doi: 10.1016/j.jclepro.2023.139308.
[33] Y. Patil, X. Ku, and V. Vasudev, "Pyrolysis Characteristics and Determination of Kinetic and Thermodynamic Parameters of Raw and Torrefied Chinese Fir," ACS Omega, vol. 8, no. 38, pp. 34938–34947, Sep 26 2023, doi: 10.1021/acsomega.3c04328.
[34] D. R. Vardon, B. R. Moser, and W. Zheng, "Complete Utilization of Spent Coffee Grounds To Produce Biodiesel, Bio-Oil, and Biochar," ACS Sustainable Chemistry & Engineering, vol. 1, no. 10, pp. 1286–1294, 2013, doi: 10.1021/sc400145w.
[35] T. Kandaramath Hari, Z. Yaakob, and Binitha, "Aviation biofuel from renewable resources: Routes, opportunities and challenges," Renewable and Sustainable Energy Reviews, vol. 42, pp. 1234–1244, 2015, doi: 10.1016/j.rser.2014.10.095.
[36] H. Tang, Q. Dai, and Y. Cao, "Production of jet fuel range hydrocarbons using a magnetic Ni–Fe/SAPO-11 catalyst for solvent-free hydrodeoxygenation of jatropha oil," Biomass and Bioenergy, vol. 177, 2023, doi: 10.1016/j.biombioe.2023.106927.
[37] J. Hamilton, K. Elliott, and P. Singh, "Investigation on elastomer behaviour when exposed to conventional and sustainable aviation fuels," The Aeronautical Journal, vol. 128, no. 1325, pp. 1485–1500, 2024, doi: 10.1017/aer.2024.59.
[38] C.-H. Lin, Y.-K. Chen, and W.-C. Wang, "The production of bio-jet fuel from palm oil derived alkanes," Fuel, vol. 260, 2020, doi: 10.1016/j.fuel.2019.116345.
[39] B. E. Rogachuk and J. A. Okolie, "Comparative assessment of pyrolysis and Gasification-Fischer Tropsch for sustainable aviation fuel production from waste tires," Energy Conversion and Management, vol. 302, 2024, doi: 10.1016/j.enconman.2024.118110.
[40] B. Hao, G. Hou, and Z. Liu, "Ethanol Upgrading to Jet Fuel Precursors over Ni/MgO@C Catalysts Derived from Bimetallic Metal–Organic Frameworks," Energy & Fuels, vol. 40, no. 18, pp. 10169–10183, 2026, doi: 10.1021/acs.energyfuels.6c00633.
[41] M. Y. Liow, W. Z. Ng, and C. P. Song, "Lipid feedstocks for sustainable aviation fuel (SAF) production via hydroprocessed esters and fatty acids (HEFA) pathway: Current status and challenges in quality, sustainability, availability and cost," Renewable and Sustainable Energy Reviews, vol. 236, 2026, doi: 10.1016/j.rser.2026.117006.
[42] I.-H. Choi, K.-R. Hwang, and J.-S. Han, "The direct production of jet-fuel from non-edible oil in a single-step process," Fuel, vol. 158, pp. 98–104, 2015, doi: 10.1016/j.fuel.2015.05.020.
[43] A. G. Romero-Izquierdo and Gómez-Castro, "Intensification of the alcohol-to-jet process to produce renewable aviation fuel," Chemical Engineering and Processing - Process Intensification, vol. 160, 2021, doi: 10.1016/j.cep.2020.108270.
[44] B. H. H. Goh, C. T. Chong, and Ong, "Recent advancements in catalytic conversion pathways for synthetic jet fuel produced from bioresources," Energy Conversion and Management, vol. 251, 2022, doi: 10.1016/j.enconman.2021.114974.
[45] M. A. Bashir, S. Lima, and Jahangiri, "A step change towards sustainable aviation fuel from sewage sludge," Journal of Analytical and Applied Pyrolysis, vol. 163, 2022, doi: 10.1016/j.jaap.2022.105498.
[46] D. de la Calle, J. Cueto, and Mar Alonso-Doncel, "Production of precursors for sustainable aviation fuels through furfural/cyclopentanone aldol condensation boosted by TiO2-loaded dendritic ZSM-5 catalysts," Fuel, vol. 412, 2026, doi: 10.1016/j.fuel.2025.138137.
[47] V. Eyberg, V. Dieterich, and S. Bastek, "Techno-economic assessment and comparison of Fischer–Tropsch and Methanol-to-Jet processes to produce sustainable aviation fuel via Power-to-Liquid," Energy Conversion and Management, vol. 315, 2024, doi: 10.1016/j.enconman.2024.118728.
[48] Y. Liu, Y. Zhai, and S. Li, "Production of bio-oil with low oxygen and nitrogen contents by combined hydrothermal pretreatment and pyrolysis of sewage sludge," Energy, vol. 203, 2020, doi: 10.1016/j.energy.2020.117829.
[49] N. Gao, K. Kamran, and C. Quan, "Thermochemical conversion of sewage sludge: A critical review," Progress in Energy and Combustion Science, vol. 79, 2020, doi: 10.1016/j.pecs.2020.100843.
[50] S. R. Naqvi, R. Tariq, and M. Shahbaz, "Recent developments on sewage sludge pyrolysis and its kinetics: Resources recovery, thermogravimetric platforms, and innovative prospects," Computers & Chemical Engineering, vol. 150, 2021, doi: 10.1016/j.compchemeng.2021.107325.
[51] A. S. Abdul Hamed, N. F. Munajat, and N. Rasit, "Advancing pyrolysis of sewage sludge: Bibliometrics analysis, life cycle assessment, and circular economy insights," Thermal Science and Engineering Progress, vol. 63, 2025, doi: 10.1016/j.tsep.2025.103693.
[52] C. T. Primaz, T. Schena, and Lazzari, "Influence of the temperature in the yield and composition of the bio-oil from the pyrolysis of spent coffee grounds: Characterization by comprehensive two dimensional gas chromatography," Fuel, vol. 232, pp. 572–580, 2018, doi: 10.1016/j.fuel.2018.05.097.
[53] I. Fonts, G. Gea, and M. Azuara, "Sewage sludge pyrolysis for liquid production: A review," Renewable and Sustainable Energy Reviews, vol. 16, no. 5, pp. 2781–2805, 2012, doi: 10.1016/j.rser.2012.02.070.
[54] V. Pelagalli, M. Langone, and S. Matassa, "Pyrolysis of municipal sewage sludge: challenges, opportunities and new valorization routes for biochar, bio-oil, and pyrolysis gas," Environmental Science: Water Research & Technology, vol. 10, no. 10, pp. 2282–2312, 2024, doi: 10.1039/d4ew00278d.
[55] K. Kapusta, "Effect of ultrasound pretreatment of municipal sewage sludge on characteristics of bio-oil from hydrothermal liquefaction process," Waste Manag, vol. 78, pp. 183–190, Aug 2018, doi: 10.1016/j.wasman.2018.05.043.
[56] A. Zaker, Z. Chen, and Zaheer-Uddin, "Catalytic pyrolysis of sewage sludge with HZSM5 and sludge-derived activated char: A comparative study using TGA-MS and artificial neural networks," Journal of Environmental Chemical Engineering, vol. 9, no. 5, 2021, doi: 10.1016/j.jece.2021.105891.
[57] R. O. Arazo, S. C. Capareda, and B. I. G. Ofrasio, "Low-temperature catalytic conversion of alkaline sewage sludge bio-oil to biodiesel: Product characteristics and reaction mechanisms," Environmental Technology & Innovation, vol. 21, 2021, doi: 10.1016/j.eti.2020.101266.
[58] R. O. Arazo, D. A. D. Genuino, and M. D. G. de Luna, "Bio-oil production from dry sewage sludge by fast pyrolysis in an electrically-heated fluidized bed reactor," Sustainable Environment Research, vol. 27, no. 1, pp. 7–14, 2017, doi: 10.1016/j.serj.2016.11.010.
[59] C. Ma, F. Zhang, and J. Hu, "Co-pyrolysis of sewage sludge and waste tobacco stem: Gas products analysis, pyrolysis kinetics, artificial neural network modeling, and synergistic effects," Bioresour Technol, vol. 389, p. 129816, Dec 2023, doi: 10.1016/j.biortech.2023.129816.
[60] L. Yang, L. Nazari, and Z. Yuan, "Hydrothermal liquefaction of spent coffee grounds in water medium for bio-oil production," Biomass and Bioenergy, vol. 86, pp. 191–198, 2016, doi: 10.1016/j.biombioe.2016.02.005.
[61] J. P. Bok, H. S. Choi, and Y. S. Choi, "Fast pyrolysis of coffee grounds: Characteristics of product yields and biocrude oil quality," Energy, vol. 47, no. 1, pp. 17–24, 2012, doi: 10.1016/j.energy.2012.06.003.
[62] M. N. AlMallahi, S. Maen Asaad, L. Rocha-Meneses, and Inayat, "A case study on bio-oil extraction from spent coffee grounds using fast pyrolysis in a fluidized bed reactor," Case Studies in Chemical and Environmental Engineering, vol. 8, 2023, doi: 10.1016/j.cscee.2023.100529.
[63] H. Fathana, M. I. Hidayat, and Asranudin, "Recent advances in the roles of spent coffee grounds as multifunctional fillers in biopolymer-based composites: a review," South African Journal of Chemical Engineering, vol. 56, 2026, doi: 10.1016/j.sajce.2026.100851.
[64] N. Papamatthaiakis, A. Barbero-López, and Eronen, "Hydrothermal Liquefaction of Coffee Silverskin and Spent Coffee Grounds: Bioenergy and Biochemical Potential," BioEnergy Research, vol. 18, no. 1, 2025, doi: 10.1007/s12155-025-10867-3.
[65] M. R. Kamesh, G. Mahendran, and V. S. S. Murthy, "Synergistic effects on biofuel yields and heating value during co-pyrolysis of sewage sludge and sugarcane residue under different blend ratios," Sci Rep, vol. 15, no. 1, p. 34220, Oct 1 2025, doi: 10.1038/s41598-025-16018-0.
[66] J. Zhang, J. Jin, and M. Wang, "Co-pyrolysis of sewage sludge and rice husk/ bamboo sawdust for biochar with high aromaticity and low metal mobility," Environ Res, vol. 191, p. 110034, Dec 2020, doi: 10.1016/j.envres.2020.110034.
[67] B. Zhao, X. Xu, and H. Li, "Kinetics evaluation and thermal decomposition characteristics of co-pyrolysis of municipal sewage sludge and hazelnut shell," Bioresour Technol, vol. 247, pp. 21–29, Jan 2018, doi: 10.1016/j.biortech.2017.09.008.
[68] N. S. Jamaluddin, H. Hassan, and Ahmad, "Synergistic co-pyrolysis of spent coffee grounds and polypropylene into hydrocarbon-rich bio-oil and carbon-rich biochar," Next Energy, vol. 11, 2026, doi: 10.1016/j.nxener.2026.100606.
[69] Y. Han, M. Gholizadeh, and C.-C. Tran, "Hydrotreatment of pyrolysis bio-oil: A review," Fuel Processing Technology, vol. 195, 2019, doi: 10.1016/j.fuproc.2019.106140.
[70] A. Gil, I. Sancho-Sanz, and S. A. Korili, "Progress and Perspectives in the Catalytic Hydrotreatment of Bio-Oils: Effect of the Nature of the Metal Catalyst," Industrial & Engineering Chemistry Research, vol. 63, no. 27, pp. 11759–11775, 2024, doi: 10.1021/acs.iecr.4c00747.
[71] J. Ding and O. Eljamal, "Synergistic enhancement of hydrogen and methane co-production in sewage sludge and spent coffee grounds co-digestion using nano zero-valent iron," Biomass and Bioenergy, vol. 215, 2026, doi: 10.1016/j.biombioe.2026.109620.
[72] D.-W. Cho, E. E. Kwon, and G. Kwon, "Co-pyrolysis of paper mill sludge and spend coffee ground using CO2 as reaction medium," Journal of CO2 Utilization, vol. 21, pp. 572–579, 2017, doi: 10.1016/j.jcou.2017.09.003.
[73] G. Kabir and B. H. Hameed, "Recent progress on catalytic pyrolysis of lignocellulosic biomass to high-grade bio-oil and bio-chemicals," Renewable and Sustainable Energy Reviews, vol. 70, pp. 945–967, 2017, doi: 10.1016/j.rser.2016.12.001.
[74] R. Mahadevan, S. Adhikari, and R. Shakya, "Effect of Alkali and Alkaline Earth Metals on in-Situ Catalytic Fast Pyrolysis of Lignocellulosic Biomass: A Microreactor Study," Energy & Fuels, vol. 30, no. 4, pp. 3045–3056, 2016, doi: 10.1021/acs.energyfuels.5b02984.
[75] X. Xi, K. a. Jin, and X. Niu, "A novel tandem pyrolysis-catalytic upgrading strategy for plastic waste to high-value products with zeolite and red mud," Energy, vol. 330, 2025, doi: 10.1016/j.energy.2025.136921.
[76] K. Santin, J. Alvarez, and G. Lopez, "Valorization of waste plastic mixtures by pyrolysis and in-line catalytic cracking on a hierarchical HY zeolite," Energy, vol. 344, 2026, doi: 10.1016/j.energy.2026.140128.
[77] A. Chotirattanachote, J. Ratthiwal, and C. Samart, "Unlocking high-value bio-chemicals: Pyrolysis-GC/MS study of thermal and zeolite-catalyzed decomposition of local palm oil empty fruit bunches (PEFB)," Biomass and Bioenergy, vol. 206, 2026, doi: 10.1016/j.biombioe.2025.108598.
[78] W. Wang, R. Lemaire, and A. Bensakhria, "Review on the catalytic effects of alkali and alkaline earth metals (AAEMs) including sodium, potassium, calcium and magnesium on the pyrolysis of lignocellulosic biomass and on the co-pyrolysis of coal with biomass," Journal of Analytical and Applied Pyrolysis, vol. 163, 2022, doi: 10.1016/j.jaap.2022.105479.
[79] W. Kai, X. Xie, and D. Lin, "Catalytic pyrolysis of paper mill sludge over self-sourced CaO/biochar catalyst under different temperatures," Fuel, vol. 398, 2025, doi: 10.1016/j.fuel.2025.135538.
[80] E. Pütün, "Catalytic pyrolysis of biomass: Effects of pyrolysis temperature, sweeping gas flow rate and MgO catalyst," Energy, vol. 35, no. 7, pp. 2761–2766, 2010, doi: 10.1016/j.energy.2010.02.024.
[81] Y. Shi, W. Zhao, and M. H. Tahir, "Optimizing Fe-loaded catalysts in dual-stage pyrolysis-volatile reforming of biomass: Enhancing aromatic and hydrogen yield from wheat straw," Journal of Analytical and Applied Pyrolysis, vol. 194, 2026, doi: 10.1016/j.jaap.2025.107539.
[82] G. Noh, Z. Shi, and S. I. Zones, "Isomerization and β-scission reactions of alkanes on bifunctional metal-acid catalysts: Consequences of confinement and diffusional constraints on reactivity and selectivity," Journal of Catalysis, vol. 368, pp. 389–410, 2018, doi: 10.1016/j.jcat.2018.03.033.
[83] A. R. Aghamiri and P. Lahijani, "Catalytic conversion of biomass and plastic waste to alternative aviation fuels: A review," Biomass and Bioenergy, vol. 183, 2024, doi: 10.1016/j.biombioe.2024.107120.
[84] Y. Zhang, D. Duan, H. Lei, E. Villota, and R. Ruan, "Jet fuel production from waste plastics via catalytic pyrolysis with activated carbons," Applied Energy, vol. 251, 2019, doi: 10.1016/j.apenergy.2019.113337.
[85] E. S. K. Why, H. C. Ong, and H. V. Lee, "Single-step catalytic deoxygenation of palm feedstocks for the production of sustainable bio-jet fuel," Energy, vol. 239, 2022, doi: 10.1016/j.energy.2021.122017.
[86] B. Panchal, C.-H. Su, and C.-C. Fu, "A review of municipal sewage sludge biological material applications in biofuel and environmental pollution control and future opportunities," Journal of Environmental Chemical Engineering, vol. 13, no. 5, 2025, doi: 10.1016/j.jece.2025.118223.
[87] A. D. S. Borges, M. Cardoso, and M. Oliveira, "Thermochemical evaluation of biochars properties from Portuguese agro-forestry residues for solid fuel applications," Sci Rep, vol. 16, no. 1, p. 1120, Dec 6 2025, doi: 10.1038/s41598-025-30809-5.
[88] A. E871-82, "Standard Test Method for Moisture Analysis of Particulate Wood Fuels," 2019, doi: 10.1520/e0871-82r19.
[89] A. E872-82, "Standard Test Method for Moisture Analysis of Particulate Wood Fuels," 2019, doi: 10.1520/e0871-82r19.
[90] A. E-1755-01, "Standard Test Method for Ash in Biomass, A. International," 2001, doi: 10.1520/e0871-82r19.
[91] 國立中興大學元素分析儀實驗室, "元素分析儀."
[92] 國立成功大學貴重儀器使用中心, "元素分析儀."
[93] 國立清華大學貴重儀器中心, "TGA-GCMS."
[94] 國立成功大學貴重儀器使用中心, "ICPMS."
[95] 國立成功大學貴重儀器使用中心, "GCMS."
[96] T. Shan, H. Bian, and K. Wang, "Study on pyrolysis characteristics and kinetics of mixed waste plastics under different atmospheres," Thermochimica Acta, vol. 722, 2023, doi: 10.1016/j.tca.2023.179467.
[97] Y. Saleh, L. Ali, A. Alam, M. S. Kuttiyathil, and M. Altarawneh, "Pyrolysis characteristics, thermo-kinetic parameters, and evolved gas analysis for waste biomass derived from food processing industries," Green Technologies and Sustainability, vol. 4, no. 1, 2026, doi: 10.1016/j.grets.2025.100266.
[98] D. W. B. G. E. P. Box "Some New Three Level Designs for the Study of Quantitative Variables," Taylor & Francis, vol. 2, pp. 455–475, 1960.
[99] S. L. Ferreira, R. E. Bruns, and H. S. Ferreira, "Box-Behnken design: an alternative for the optimization of analytical methods," Anal Chim Acta, vol. 597, no. 2, pp. 179–86, Aug 6 2007, doi: 10.1016/j.aca.2007.07.011.
[100]Y. Zhang, G. Ji, and D. Ma, "Exergy and energy analysis of pyrolysis of plastic wastes in rotary kiln with heat carrier," Process Safety and Environmental Protection, vol. 142, pp. 203–211, 2020, doi: 10.1016/j.psep.2020.06.021.
[101]W. Zuo, B. Jin, and Y. Huang, "Pyrolysis of high-ash sewage sludge in a circulating fluidized bed reactor for production of liquids rich in heterocyclic nitrogenated compounds," Bioresour Technol, vol. 127, pp. 44–8, Jan 2013, doi: 10.1016/j.biortech.2012.09.017.
[102]S. K. M. NARASIMHARAO KONDAMUDI, MANO MISRA, "Spent Coffee Grounds as a Versatile Source of Green Energy," Journal of Agricultural and Food Chemistry, vol. 56, pp. 11757–11760, 2008.
[103]N. S. Tsutomu Okuno, Jun-ichiro Hayashi, "Primary Release of Alkali and Alkaline Earth Metallic Species during the Pyrolysis of Pulverized Biomass," Energy and Fuels, vol. 19, pp. 2164–2171, 2005.
[104]M. O'Boyle, B. A. Mohamed, and L. Y. Li, "Co-pyrolysis of sewage sludge and biomass waste into biofuels and biochar: A comprehensive feasibility study using a circular economy approach," Chemosphere, vol. 350, p. 141074, Feb 2024, doi: 10.1016/j.chemosphere.2023.141074.
[105]X. Wang, S. Deng, and H. Tan, "Synergetic effect of sewage sludge and biomass co-pyrolysis: A combined study in thermogravimetric analyzer and a fixed bed reactor," Energy Conversion and Management, vol. 118, pp. 399–405, 2016, doi: 10.1016/j.enconman.2016.04.014.
[106]S. Capone, K. Gallucci, and L. Taglieri, "Thermal pre-treatment of waste municipal sewage sludge for thermochemical valorizations: An experimental study on moisture reduction and sludge modifications," Applications in Energy and Combustion Science, vol. 24, 2025, doi: 10.1016/j.jaecs.2025.100405.
[107]J. Mulopo, "A systematic overview of current advancements for chemical, material, and energy production using sewage sludge for industrial ecology and sustainability transition," Environmental Sustainability, vol. 7, no. 1, pp. 5–29, 2024, doi: 10.1007/s42398-023-00301-9.
[108]M. Francisca Gómez-Rico, R. Font, A. Fullana, and I. Martín-Gullón, "Thermogravimetric study of different sewage sludges and their relationship with the nitrogen content," Journal of Analytical and Applied Pyrolysis, vol. 74, no. 1-2, pp. 421–428, 2005, doi: 10.1016/j.jaap.2004.11.029.
[109]C. Diblasi, "Modeling chemical and physical processes of wood and biomass pyrolysis," Progress in Energy and Combustion Science, vol. 34, no. 1, pp. 47–90, 2008, doi: 10.1016/j.pecs.2006.12.001.
[110]H. Yang, R. Yan, and H. Chen, "Characteristics of hemicellulose, cellulose and lignin pyrolysis," Fuel, vol. 86, no. 12-13, pp. 1781–1788, 2007, doi: 10.1016/j.fuel.2006.12.013.
[111]P. Brachi, V. Santes, and E. Torres-Garcia, "Pyrolytic degradation of spent coffee ground: A thermokinetic analysis through the dependence of activation energy on conversion and temperature," Fuel, vol. 302, 2021, doi: 10.1016/j.fuel.2021.120995.
[112]L. Bai, B. Wu, and J. Cao, "Advancements in sludge pyrolysis: Integrated resource recovery and process-derived pollutant mitigation," Journal of Analytical and Applied Pyrolysis, vol. 190, 2025, doi: 10.1016/j.jaap.2025.107137.
[113]D. K. Shen and S. Gu, "The mechanism for thermal decomposition of cellulose and its main products," Bioresour Technol, vol. 100, no. 24, pp. 6496–504, Dec 2009, doi: 10.1016/j.biortech.2009.06.095.
[114]N. Liu, H. Huang, and X. Huang, "Co-pyrolysis Behavior of Coal and Biomass: Synergistic Effect and Kinetic Analysis," ACS Omega, vol. 9, no. 29, pp. 31803–31813, Jul 23 2024, doi: 10.1021/acsomega.4c03053.
[115]Q. Song, X. Wang, and W. Zhang, "Comprehensive insight into co-pyrolysis of sewage sludge and tobacco stalk: Effects of mixing ratio and pyrolysis conditions on product distribution and characteristics," Environ Res, vol. 238, no. Pt 2, p. 117271, Dec 1 2023, doi: 10.1016/j.envres.2023.117271.
[116]Y. Zhu, D. Liu, and Z. Tan, "Volatile-char interactions during co-pyrolysis of sewage sludge and poplar wood," Journal of the Energy Institute, vol. 117, 2024, doi: 10.1016/j.joei.2024.101820.
[117]C. Liu, Z. Shen, and H. Zhang, "Comprehensive study on co-pyrolysis mechanisms of sewage sludge and low rank coal under rapid/slow heating conditions," Journal of Analytical and Applied Pyrolysis, vol. 185, 2025, doi: 10.1016/j.jaap.2024.106873.
[118]R. Kumar Mishra and K. Mohanty, "Kinetic analysis and pyrolysis behavior of low-value waste lignocellulosic biomass for its bioenergy potential using thermogravimetric analyzer," Materials Science for Energy Technologies, vol. 4, pp. 136–147, 2021, doi: 10.1016/j.mset.2021.03.003.
[119]A. Ben Abdallah, A. Ben Hassen Trabelsi, and M. V. Navarro, "Pyrolysis of tea and coffee wastes: effect of physicochemical properties on kinetic and thermodynamic characteristics," J Therm Anal Calorim, vol. 148, no. 6, pp. 2501–2515, 2023, doi: 10.1007/s10973-022-11878-4.
[120]J. Chen, J. Liu, and Y. He, "Investigation of co-combustion characteristics of sewage sludge and coffee grounds mixtures using thermogravimetric analysis coupled to artificial neural networks modeling," Bioresour Technol, vol. 225, pp. 234–245, Feb 2017, doi: 10.1016/j.biortech.2016.11.069.
[121]Y. Liu, Y. Song, and J. Fu, "Co-pyrolysis of sewage sludge and lignocellulosic biomass: Synergistic effects on products characteristics and kinetics," Energy Conversion and Management, vol. 268, 2022, doi: 10.1016/j.enconman.2022.116061.
[122]X. Chen, K. A. Orton, and C. Mukarakate, "Cycloalkane-rich sustainable aviation fuel production via hydrotreating lignocellulosic biomass-derived catalytic fast pyrolysis oils," Sustainable Energy & Fuels, vol. 8, no. 23, pp. 5504–5513, 2024, doi: 10.1039/d4se01151a.
[123]D. W. Cho, S. H. Cho, and H. Song, "Carbon dioxide assisted sustainability enhancement of pyrolysis of waste biomass: A case study with spent coffee ground," Bioresour Technol, vol. 189, pp. 1–6, 2015, doi: 10.1016/j.biortech.2015.04.002.
[124]J. Bai, Q. Lv, and X. Fu, "Catalytic reforming of sewage sludge pyrolysis products over the self-derived char," Journal of Analytical and Applied Pyrolysis, vol. 168, 2022, doi: 10.1016/j.jaap.2022.105759.
[125]H. El Bari, C. K. Fanezoune, and B. Dorneanu, "Catalytic fast pyrolysis of lignocellulosic biomass: Recent advances and comprehensive overview," Journal of Analytical and Applied Pyrolysis, vol. 178, 2024, doi: 10.1016/j.jaap.2024.106390.
[126]I. Kariim, H. Swai, and T. Kivevele, "Bio-Oil Upgrading over ZSM-5 Catalyst: A Review of Catalyst Performance and Deactivation," International Journal of Energy Research, vol. 2023, pp. 1–33, 2023, doi: 10.1155/2023/4776962.
[127]A. Veses, M. Aznar, and I. Martinez, "Catalytic pyrolysis of wood biomass in an auger reactor using calcium-based catalysts," Bioresour Technol, vol. 162, pp. 250–8, Jun 2014, doi: 10.1016/j.biortech.2014.03.146.
[128]E. Farah, L. Demianenko, and K. Engvall, "Controlling the Activity and Selectivity of HZSM-5 Catalysts in the Conversion of Biomass-Derived Oxygenates Using Hierarchical Structures: The Effect of Crystalline Size and Intracrystalline Pore Dimensions on Olefins Selectivity and Catalyst Deactivation," Topics in Catalysis, vol. 66, no. 17-18, pp. 1310–1328, 2023, doi: 10.1007/s11244-023-01833-4.
[129]A. Demirbas, "Effects of temperature and particle size on bio-char yield from pyrolysis of agricultural residues," Journal of Analytical and Applied Pyrolysis, vol. 72, no. 2, pp. 243–248, 2004, doi: 10.1016/j.jaap.2004.07.003.
[130]X. Duan, G. Qian, and X. Zhou, "Tuning the size and shape of Fe nanoparticles on carbon nanofibers for catalytic ammonia decomposition," Applied Catalysis B: Environmental, vol. 101, no. 3-4, pp. 189–196, 2011, doi: 10.1016/j.apcatb.2010.09.017.
[131]P. M. Mortensen, J. D. Grunwaldt, and P. A. Jensen, "A review of catalytic upgrading of bio-oil to engine fuels," Applied Catalysis A: General, vol. 407, no. 1-2, pp. 1–19, 2011, doi: 10.1016/j.apcata.2011.08.046.
[132]X. Li, M. Li, and C. Wei, "Construction of electron-rich active sites in the metallic active phase of iron-based hydrogenation catalysts and their regulation on HDN pathway selectivity," Journal of Fuel Chemistry and Technology, vol. 54, no. 5, 2026, doi: 10.1016/s1872-5813(26)60701-3.