微波等离子体条件下甲烷的偶联反应  

Study on Methane Coupling Under Microwave Plasma

作　　者：徐春蕾[1] 董家騄[2] 杨鸿生[3] 孙德坤[2] 杨春[4] 

机构地区：[1]南京中医药大学药学院,江苏南京210029 [2]南京大学化学化工学院,江苏南京210093 [3]东南大学电子工程系,江苏南京210096 [4]南京师范大学化学与环境科学学院,江苏南京210097

出　　处：《南京师大学报（自然科学版）》2004年第4期55-58,共4页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省科技厅省"十五"攻关资助项目 (BE2 0 0 10 3 4)

摘　　要：运用微波等离子体技术 ,在多模谐振腔中研究了甲烷偶联反应 .考察了催化剂、激励器和添加气H2对提高起辉压力 (产生等离子体的压力 )的影响 ,以及常压下H2 /CH4 摩尔比、流速和微波辐照时间对甲烷偶联反应的影响 .结果表明 ,激励器比催化剂更利于提高起辉压力 ;添加气H2 对减少积碳和提高起辉压力均有显著作用 ,使反应可在常压下操作 .常压下 ,经优化反应条件 ,甲烷转化率可达 83 .9% ,乙炔收率可达 65 .9% .Methane coupling was studied in a multi-mode resonator under microwave plasma. The effects of catalyst, initiator and additive gas H_2 on discharge pressure (the pressure at which plasma could be induced), and the effects of molar ratio of H_2/CH_4, flow rate and microwave irradiation time on the reaction performance were investigated. The results showed that the initiator is superior to the catalyst in the increase of discharge pressure and the additive gas H_2 had good effects both on the increase of discharge pressure and on the decrease of deposited carbon. The addition of H_2 could make the reaction go on at the normal pressure. At the normal pressure, under the optimal condition, methane conversion and acetylene yield were up to (83.9%) and 65.9%, respectively.

关 键 词：微波等离子体 甲烷偶联 激励器 

分 类 号：O643[理学—物理化学] TL652[理学—化学]