甲烷在氢气助解下的脱氢偶联研究  

Study on coupling reaction of methane dehydrogenation at the aid decomposition of hydrogen

作　　者：陈栋梁[1] 白宇新[2] 王真[3] 毕先钧[4] 洪品杰[3] 戴树珊[3] 

机构地区：[1]中国科学院成都有机化学所,成都610041 [2]深圳市天泽科技实业有限公司 [3]云南大学化学系,昆明650091 [4]云南师范大学化学系,昆明650093

出　　处：《天然气化工—C1化学与化工》2001年第2期18-22,共5页Natural Gas Chemical Industry

摘　　要：运用微波等离子体技术 ,研究了甲烷在氢气助解下的等离子体化学反应。在该偶联反应中 ,氢气是一种气体催化剂 ,它的加入有助于甲烷的脱氢偶联转化制备C2 烃。在相同的条件下 ,甲烷的转化率和乙炔的选择性都随着微波输入功率的增加而增大 ,乙烷的选择性则降低。在最佳条件下 ,甲烷的转化率达到 77.5 % ,乙炔的选择性达到 74.1%。对等离子体中的电子密度和电子能量进行了诊断 ,根据实验结果 。The microwave plasma chemical reactions of CH_4 at the aid decomposition of H_2 were studied by using the microwave plasma technology. Hydrogen was a gas catalyst in the reactions, and it was useful for hydrogen to synthesis of C_2 hydrocarbons by dehydrogenation coupling reactions of methane. At the same conditions, the conversion of methane and selectivity of C_2H_2 increased with microwave input power increasing, and selectivity of C_2H_6 decreased. In the optimal operation, the conversion of methane was up to 77.5%, selectivity of C_2H_2 was 74.1%. Electron energy and density in the plasma of CH_4 and H_2 were diagnosed by a floating double electrostatic probes. According to result of experiments, mechanisms of methane dehydrogenation coupling reaction at the aid decomposition of hydrogen were proposed.

关 键 词：甲烷 氢气 助解 微波等离子体 脱氢偶联 乙烯 乙炔 天然气 化学反应 催化剂 

分 类 号：TE646[石油与天然气工程—油气加工工程] O646.9[理学—物理化学]