微波辐照下半焦催化甲烷裂解制氢研究  

CATALYTIC METHANE DECOMPOSITION OVER COAL CHAR UNDER MICROWAVE IRRADIATION

作　　者：郝瑛轩[1,2] 刘全润[1] 李国亮[1] 张双杰[1] 潘结南[3] 

机构地区：[1]河南理工大学材料科学与工程学院 [2]河南中鸿集团煤化有限公司,河南平顶山467000 [3]河南理工大学资源环境学院

出　　处：《煤炭转化》2014年第4期64-68,共5页Coal Conversion

基　　金：中国科学院战略性先导科技专项项目(XDA05010304)

摘　　要：以未经任何活化的内蒙古燥热解半焦为催化剂,研究了甲烷在微波加热条件下裂解制氢的反应规律和催化剂失活机理,探讨了半焦的表面结构特征和合氧官能团,分析了反应条件对甲烷催化裂解过程的影响.研究表明,在650℃～850℃之间,内蒙古褐煤半焦是一种很好的甲烷裂解制氢催化剂,在半焦制备温度为850℃,反应温度为850℃,空速为600 mL/（h·g）的条件下,半焦催化甲烷裂解的初始转化率最高达到了61.75％;升高半焦制备温度和催化反应温度以及降低空速有利于提高甲烷的转化率;半焦催化活性降低的主要原因是表面结构特性的改变和含氧官能团的减少.The aim of this work was to use low-cost coal chars prepared from Inner Mon- golia lignite （IML） without further activation as a catalyst for hydrogen production by methane decomposition in the microwave-assisted heating apparatus. The condition of methane decomposi- tion was investigated and the surface properties changes of the chars including surface area, pore volume and oxygen containning functional groups were analyzed. The results indicated that IML char prepared from 650 ℃ to 850 ℃ had a high activity in methane decomposition, at reaction temperature of 850 ℃ and space velocity of 600 mL/（h · g）, the initial rate of methane decompo- sition over IML char prepared of 850℃ up to 61.75%. And the methane conversion increased with the increase of the preparation temperature of char and catalytic reaction temperature, and the decrease of VHSV. The catalyst deactivation was mainly caused by the changes of surface properties and the reduction of functional oxygen groups.

关 键 词：微波 半焦 甲烷裂解 制氢 

分 类 号：TQ032[化学工程]