催化剂对CH_4气氛下的煤热解特性的影响  

Influence of catalyst on coal pyrolysis during CH_4 atmosphere

作　　者：倪明江[1] 赵乐[1] 方梦祥[1] 李敏[1] 李超[1] 王勤辉[1] 骆仲泱 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2016年第2期320-326,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家"863"高技术研究发展计划资助项目(2013AA051203);国际合作资助项目(2011DFR60190);高等学校学科创新引智计划资助项目(B08026)

摘　　要：采用3种活化CH_4的方式,利用管式炉分别考察了在CH_4气氛下添加2、Ni/Al2O3、Mo/HZSM-5这3种物质对煤热解特性的影响.结果表明,相比于N2气氛,CH_4气氛下热解产生的焦油增多,焦油中杂原子化合物减少,半焦中硫、氮质量分数降低.在CH_4气氛中添加3种物质均能使热解时产生的焦油品质提高.添加H_2使得热解的气体产率(体积)增加,半焦产率降低,但半焦的元素成分无明显变化;添加Ni/Al2O3使得气体产率增加,焦油中轻质组分增多,半焦中的硫含量降低、氮含量增高.添加Mo/H_ZSM-5使得气体产率下降,焦油中芳香族化合物增多,半焦的碳缩聚程度加深.CH_4was activated in three different ways.The effects of H_2,Ni/Al_2O_3 or Mo/HZSM-5on coal pyrolysis characters were respectivelv investigated in a tube furnace under CH_4 atmosphere.Results show that,compared with coal pyrolysis products under N2 atmosphere,coal tar yield increases during CH4 atmosphere,along with heteroatomic compounds in tar,sulfur and nitrogen content in char decreasing.In the process of coal pyrolysis,adding H2,Ni/Al2O3 or Mo/HZSM-5into CH4 atmosphere can all improve the tar quality.With H2 in CH4 atmosphere,gas yield（volume）increases,char yield reduces with no obvious effects on char elementary composition.With Ni/Al2O3 catalyst,gas yield and the proportion of light components in tar both increase,sulfur content in char decreases while nitrogen content increases.With Mo/HZSM-5catalyst,more aromatic compounds in tar are generated.Gas yield decreases,and the degree of carbon polycondensations in coal pyrolysis is strengthened.

关 键 词：煤热解 管式炉 催化剂 加氢 色质联用 

分 类 号：TQ530.2[化学工程—煤化学工程]