文献类型：期刊文章

作　　者：公旭中[1,2] 郭占成[1,3] 王志[1]

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [2]中国科学院研究生院,北京100049 [3]北京科技大学循环与生态冶金教育部重点实验室,北京100083

出　　处：《化工学报》

基　　金：国家高技术研究发展计划项目(20060105Z2025)~~

年　　份：2009

卷　　号：60

期　　号：7

起止页码：1707-1713

语　　种：中文

收录情况：AJ、BDHX、BDHX2008、CAS、CSCD、CSCD2011_2012、EI、IC、JST、RCCSE、SCOPUS、ZGKJHX、核心刊

摘　　要：TG-DTG and DTA determination indicated that ignition temperature of anthracite was lowered from 458℃ to 405℃ by addition of 10% catalyst Fe2O3.Based on the nature of anthracite ignition temperature,pyrolysis conversion and pyrolysis gas composition during the catalytic combustion were examined.The results showed that with Fe2O3 addition anthracite pyrolysis conversion was 3.0% at 405℃ and components with higher heating value increased in the pyrolysis gas.However,without Fe2O3 addition pyrolysis conversion was 1.8% at ignition temperature.It could be concluded that the heat from the homogeneous combustion of catalytic combustion was higher than that of non-catalytic combustion.TG-DTG indicated combustion conversion of 10 % at ignition.SEM images of chars indicated rough surface of char with plenty of small pores.BET of char from catalytic combustion was 170 m2·g-1 while BET of char from non-catalytic combustion was only 128 m2·g-1,which could be the main reason for lowering ignition temperature.The results from oxygen adsorption experiment showed increased oxygen content of coal with catalyst addition,which caused faster oxygen adsorption at a lower temperature and shortened the time to get required oxygen concentration and heat accumulation for ignition,thus the ignition temperature was lowered.

关 键 词：催化燃烧 燃点 机理  热解

分 类 号：TQ028.8]