丙烷為液化石油氣中的主要成分，且具有在相同質量時所釋放熱能比一般燃料油大以及與其他一級燃油(甲烷、乙烷除外)釋熱值相同時，所排放的二氧化碳較少等特性；一氧化碳為氣化生質能之主要可燃成份之一，如能了解其混合燃燒特性對於未來使用氣化生質能及降低對石油之依賴會有很大幫助。本論文主要針對丙烷搭配一氧化碳之混合燃氣進行研究，使用自行設計的直管系統進行火焰觀察，並以多點量測技術混合早期單點量測技術，量測在常溫常壓下等當量比(ψ=1.0)與不同混合比例之火焰傳遞速度、層流火焰速度變化。實驗觀察顯示火焰傳遞速度與層流火焰速度均隨著CO混合率([CO]/([C3H8]+[CO]))增加而加速，而火焰傳遞速度是在丙烷混合至CO混合率85%時達到最大值；進一步增加一氧化碳時，火焰速度則開始下降。火焰傳遞面積也會跟著一氧化碳混合量增加而變大，在CO混合率85%受到的熱傳效應與浮力效應的影響，火焰傳遞面積亦會發展到最大值。本研究利用Chemkin 3.6搭配Gri-Mech 3.0反應機構模擬火焰反應以進行靈敏度分析，分析顯示混合CO使丙烷火焰中自由基量增加及火焰溫度提昇使得層流火焰速度加速，而當CO混合率80%時，系統中H之總生成量開始降低，使層流火焰速度開始減速。

Propane (C3H8) is the major component in LPG. It possesses high heat content per unit mass while a low CO2 emission per unit heat release. Carbon monoxide (CO) is the main combustible component in fuel gases from biomass gasification. To fully utilize the gasified products from biomass, a detailed understanding of the combustion characteristics of the mixtures of the two may is important in order to reduce our future dependence on cruel oil. This thesis research focused on the combustion of the mixtures of propane and carbon monoxide. By using a self-designed tube method, the flame propagation speeds in the tube were measured. Coupled with the flame area estimation from multiple points observation of flame front, the laminar flame speeds were deduced at stoichiometric combustion (ψ= 1.0) of propane and carbon monoxide. The experimental results indicated that the flame propagation speeds as well as the deduced laminar flame speeds increased initially with the amount of carbon monoxide in the mixtures, and, a peak propagation speed and a peak flame speed were observed at CO mixture ratio([CO]/([C3H8]+[CO])) at 80% and 85%, respectively. Further increase CO mixture ratio, the flame speed started to drop. The observed flame area also increased with increasing CO mixture ratio. Caused by the heat transfer and buoyancy effects, the flame areas were also showed a peak value at 85% CO mixture ratio. In conjunction with GRI-3.0 mechanism, detailed reaction kinetic modeling of the mixtures was performed using Chemkin 3.6. The results showed that the mixing of CO into C3H8 increased the amount of free radicals in the flame, and the flame temperature raise as well to make the laminar flame speed increase. However, mixtures with CO mixture ratio higher than 80%, the production of H atom in the system begins to decrease, resulting to lower the laminar flame speeds.

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