廢棄菇包作為台灣主要的農業廢棄物之一，目前的處理方式是以掩埋與堆肥為主，但因台灣土地有限以及過度的掩埋會造成附近的環境受到破壞，因此需以更有效率且對環境更友善的方式來處理。本研究利用鼓泡式流體化氣化爐作為實驗主體，將廢棄菇包與廢棄塑料(PE)混合進行共氣化實驗。本研究首先對兩個原料進行成分與特性分析，廢PE的高熱值與高揮發份可提高整體產氣熱值，廢菇包則為低熱值、高灰份與高含O量，而廢菇包的存在可降低廢PE進料時容易發生的卡料情況。接著利用熱重分析搭配傅立葉轉換紅外線光譜儀進行分析，觀察廢菇包與廢PE在CO2環境下的熱降解過程以及所產出的氣體，並且計算活化能以及觀察兩者間的協同效應。其結果顯示廢菇包在750℃開始會有Boudouard反應，當混摻比20%時有著最低的活化能，並且廢PE與廢菇包具有協同效應，廢菇包中的酯類與羧酸使其具有C-O、C=O鍵，廢PE則主要以C-H為主。本研究利用1kWth級鼓泡式流體化床進行氣化實驗，使用田口法減少實驗總次數以及找出最佳操作參數(氣化溫度、混摻比、CO2/CO2+H2O、催化劑)。實驗結果說明水蒸氣的加入可以有效提高H2產量(Water-gas)。水蒸氣對C的反應性較高，CO2對C的反應性較低。水蒸氣與CO2的加入可以有效調控H2/CO的比例，使產生的合成氣可以有不同之應用。氣化反應皆為吸熱反應，高溫可以有效提升冷氣體效率(Cold Gas Efficiency, CGE)的比例。廢菇包與廢PE的焦油組成與形成機制有所不同，廢菇包含有雜環芳香族，廢PE含有4環以上之芳香族。廢菇包與廢PE混合時可降低2、3、5類焦油的形成，而添加橄欖石可以有效降低2、3、4類的焦油。

As one of the primary agricultural waste in Taiwan recently, landfill and compost are the main methods to deal with the waste shiitake substrate. However, a more efficient and friendly way for the environment is required because of the limited land space and the pollution from the over-landfill. In this study, a bubbling fluidized gasifier was used as a reactor. And waste shiitake substrate and waste PE were used as feedstock for the co-gasification experiment. The composition and characteristics of the two raw materials were first analyzed. According to the results, the high heating value and high volatile content of waste PE can improve the overall gas quality, while the waste shiitake substrate has a low heating value, high ash content and high O content. The presence of the waste shiitake substrate prevents PE from sticking on the feed tube wall. Subsequently, thermogravimetric analysis with Fourier transform infrared spectrometer was used to analyze the thermal degradation process and the gas produced of the waste shiitake substrate and waste PE in CO2 environment. Meanwhile, activation energy and the synergistic effect between the two feedstock were also calculated. The results show that the waste shiitake substrate has a Boudouard reaction at 750°C, and the activation energy is the lowest when the blending ratio is 20%. Waste PE and the waste shiitake substrate have a synergistic effect, and the esters and carboxylic acids in the waste shiitake substrate make it has C-O and C=O bonds, while waste PE is mainly composed of C-H. This study used a 1kWth-level bubbling fluidized bed for gasification experiments. The Taguchi method was used to reduce the number of experiments and find the optimal operating parameters (gasification temperature, blending ratio, CO2/(CO2+H2O), catalyst). The experimental results show that adding water vapor can effectively increase the production of H2 (Water-gas). Water vapor is more reactive to C, and CO2 is less reactive to C. The addition of water vapor and CO2 can control the ratio of H2/CO so that the generated syngas can be used in different applications. Gasification reactions are all endothermic reactions, and high temperatures can effectively increase the CGE(Cold Gas Efficiency). The tar composition and formation mechanism of waste shiitake substrate and waste PE is different. The waste shiitake substrate contain heterocyclic aromatics, while waste PE contains aromatics with more than 4 rings. The formation of types 2, 3, and 5 tars can be reduced when the waste shiitake substrate is mixed with waste PE, and the formation of types 2, 3, and 4 tars can be reduced by adding olivine.

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