脉冲放电等离子体甲烷氯化制氯代甲烷  

Chlorination of methane by pulsed electrical discharge plasma

作　　者：祝成凤[1] 黄立维[1] 张永霞[1] 何联候[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2012年第2期161-164,共4页Journal of Zhejiang University of Technology

摘　　要：采用脉冲电晕放电等离子体活化手段在线-筒式反应器中,进行甲烷氯化合成氯代甲烷反应.考察了原料气V(Cl2)∶V(CH4)值、电晕放电脉冲电压和电晕放电重复频率参数对甲烷转化率及氯代甲烷选择性的影响.反应物及各产物通过气相色谱法进行在线分析.实验结果表明:常温常压下,在脉冲电晕等离子体作用下,甲烷和氯气反应可以生成氯代甲烷.甲烷的转化率随加入能量强度的增加而提高.提高氯气/甲烷摩尔比,多氯甲烷的产率也提高.当反应气总流速为100mL/min,V(Cl2)∶V(CH4)=1.2∶1,脉冲放电电压为17.5kV,放电频率为80Hz时,甲烷的转化率为10.5%,一氯甲烷、二氯甲烷、三氯甲烷和四氯甲烷的选择性分别为67.6%,17.7%,13.3%和1.4%.The chlorination of methane by pulsed electrical discharge in a wire-cylinder reactor was experimentally investigated.The effects of parameters such as the ratio of V（Cl2） to V（CH4）,the pulse discharge voltage,as well as the pulse discharge frequency,on methane conversion and chlorinated methanes（CMS） selectivity were focused on.The products from methane conversion were analyzed by on-line gas-chromatography（GC）.Experimental results showed that methane could react with chlorine to produce CMS by pulsed corona discharge plasma at room temperature and atmospheric pressure.It was found that the yield of products increased with the increase of power input into the reactor.The chlorination proceeded more completely with higher Cl2/CH4 mole ratio.The conversion of methane was 10.5%,and the selectivity of chlorinated methanes were 67.6%,17.7%,13.3% and 1.4% respectively with the conditions of V（Cl2）∶V（CH4）= 1.2∶1,total flow rate of 100 mL/min,pulse discharge voltage of 17.5 kV and the discharge frequency of 80 Hz.

关 键 词：脉冲电晕放电 等离子体 甲烷 氯代甲烷 

分 类 号：X743[环境科学与工程—环境工程]