Fe/CaO催化剂对脱灰徐州烟煤热解特性的影响  

Pyrolysis characteristics of ash-free Xuzhou bituminous coal with Fe/CaO catalyst

作　　者：王东[1] 马士伟 向文国[1] 陈时熠[1] WANG Dong;MA Shiwei;XIANG Wenguo;CHEN Shiyi(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing 210096,Jiangsu,China)

机构地区：[1]东南大学能源与环境学院能源热转换及过程测控教育部重点实验室

出　　处：《化工进展》2020年第2期561-566,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金（51576042）;江苏省自然科学基金（BK20160672）

摘　　要：煤热解是一种重要的煤炭分质利用技术,但热解过程中产生的副产物焦油危害极大,催化改质是高效清洁利用煤焦油的方法之一。本文采用溶胶凝胶法制备Fe/CaO催化剂,在管式炉反应器上对脱灰徐州烟煤进行了催化热解实验,对研究催化裂解煤焦油具有重要的意义。结果表明:Fe/CaO催化剂可以明显促进热解气的产生,热解气中CO2、CO和CH4的产量均不断增加。Fe/CaO催化剂促进了液体产物的催化裂解,导致液体产率明显下降。Fe/CaO催化剂促进焦油中的稠环芳烃向脂肪烃和轻质芳烃转化,此外,Fe/CaO催化剂还对萘类化合物的产生有促进作用。Fe/CaO催化剂催化后焦油中两环化合物的含量增多,三环及以上的化合物含量减少,焦油分子量呈减少的趋势。Pyrolysis is an important utilization technology for coal,but the by-product tar is extremely harmful,and catalytic upgrading is one of the efficient and clean utilization methods of coal tar.In this paper,the catalytic pyrolysis experiments of ash-free Xuzhou bituminous coal were carried out in a tube furnace reactor on Fe/CaO catalyst prepared by sol-gel method.The results showed that Fe/CaO catalyst could promote the production of pyrolysis gas significantly,and the yields of CO2,CO and CH4 increased gradually.Fe/CaO catalyst promoted the catalytic cracking of liquid product,resulting in a significant decrease in liquid yield.Fe/CaO catalyst promoted the conversion of polycyclic aromatic hydrocarbons to aliphatic hydrocarbons and light aromatics.In addition,the production of naphthalene compounds was also promoted by Fe/CaO catalyst.The contents of bicyclic compounds in tar increased while that of the tricyclic and polycyclic compounds decreased,the molecular weight of the tar presented a declining tendency.

关 键 词：煤热解 催化改质 Fe/CaO催化剂 

分 类 号：TQ530.2[化学工程—煤化学工程]