CH4與CO2以非熱介電質電漿重組反應之研究

A Studies of the Reforming Methane and Carbon Dioxide by Non-Thermal Plasma

廖文甫(W. P. Liao) ； 鄭進山(C. S. Cheng)

《鑛冶：中國鑛冶工程學會會刊》 54卷3期 (2010/09) Pp. 137-144

https://doi.org/10.30069/MM.201009.0012

摘要

因應地球的環境保護而言，將CO2與CH4兩種溫室效應最主要氣體，進行電漿重組之後，再利用大氣介電質電漿做為氣體的前處理，轉化成高階之碳氫化合物，經由調整操作條件以找出不使設備加溫及不添加觸媒之最佳條件。本研究利用介電質電漿針對甲烷與二氧化碳兩種氣體進行轉化重組，以傅立葉轉化紅外線光譜儀與氣相層析儀分析產物之組合。探討改變甲烷／二氧化碳進流流量、電漿操作電壓及氬氣含量為操作條件，對於二氧化碳及甲烷的轉化率與其產物的選擇性的影響。實驗結果顯示，甲烷及二氧化碳之轉化率為電壓越高轉化率越多，相對的選擇性也會增加提升，在氬氣含量增加時，轉化效果隨著含量越多轉化率也有顯著的增加，所以我們可得知氬氣含量以及氣體進流流量都是會影響轉化率的因素之一，而最佳操作條件是在電壓20 kV、進流流量50sccm、氬氣含量30%時，轉化率所達到效果最好，甲烷及二氧化碳轉化率分別為56.2%及21.4%，轉化結果得知產物為乙炔、乙烯及一氧化碳，而最終產物選擇性則分別為28.3%、17.4%及25.4%。

關鍵字

介電質電漿 ； 甲烷 ； 二氧化碳

並列摘要

Due to environmental protection for the earth, we used plasma to reform the two main gases which cause green-house effect, carbon dioxide and methane. Further, we used atmosphere dielectric plasma to execute the pretreatment of the gases, and the gases transformed into high-level hydrocarbon compounds. Via adjusting the operating parameters, we tried to found the optimum without heating the instruments and without adding catalysts.In this study, we used dielectric plasma to reform and to transform CO2 and CH4, and we used Fourier transforming infrared spectroscopy and gas chromatography to analyze the compositions of the products. We varied the flow rate of CH4/CO2, operating voltage of plasma and argon content to discuss the effects of conversion rate and selectivity of CH4, CO2 and products in the reaction.In the results, we found that the conversion rate enhanced with the increase of the operating voltage, and the selectivity enhanced, too. As argon gas increased, the conversion rate apparently enhanced. Thus, we knew argon gas content and flow rate of the gases were the factors that influenced the conversion rate. The optimal operating condition was at voltage 20 kV, flow-in rate 50 sccm and argon content 30%, and the conversion rate reached the best performance. The conversion rates of methane and carbon dioxide were 56.2% and 21.4%, respectively. The products were acetylene, ethylene and carbon oxide, and the final selectivities of these three products were 28.3%, 17.4 % and 25.4%, respectively.

並列關鍵字

DBD ； methane ； carbon dioxide