橄榄石基固体热载体影响褐煤热解产物分布的分析  

Product distribution of lignite pyrolysis with olivine-based solid heat carrier

作　　者：邓靖[1] 李文英[1] 李晓红[1] 喻长连[1] 冯杰[1] 郭小汾 

机构地区：[1]太原理工大学煤科学与技术省部共建国家重点实验室培育基地,山西太原030024 [2]北京低碳清洁能源研究所,北京102209

出　　处：《燃料化学学报》2013年第8期937-942,共6页Journal of Fuel Chemistry and Technology

基　　金：国家高技术研究发展计划(863计划;2011AA05A202)

摘　　要：为了提高固体热载体煤热解工艺中焦油的品质,降低焦油中沸点大于360℃的重质组分含量,本实验采用固定床反应器,在450～600℃下进行褐煤固体热载体快速热解反应。分析对比了橄榄石基和石英砂固体热载体对褐煤热解产物收率、焦油馏分、气体组成的影响。结果发现,Co能改变煤内部挥发分氢元素的分布,橄榄石负载Co热载体能将焦油中重质组分转化为轻质焦油和热解气。热解温度为550℃时,与橄榄石相比,负载Co的橄榄石固体热载体使焦油收率提高了19.2%。与石英砂相比,负载Co的橄榄石固体热载体使焦油中重质组分含量降低了17.0%,轻质组分收率达5.1%,其中,轻油、酚油和萘油分别提高了19.6%、17%和15.2%,气体产物中H2、CH4含量下降。To improve the quality of tar, and reduce the heavy fraction （whose boiling points are greater than 360 ℃ ） in the tar, the lignite fast pyrolysis process using olivine and Co-impregnated olivine （Co/olivine） as the solid heat carrier was investigated in a fixed bed reactor over the temperature range 450 - 600 ℃. The effects of olivine and Co/olivine on the product yield, gas composition and tar fraction were examined. The results show that Co/olivine leads to a decrease in heavy oil fraction content, but an increase in tar yield. Co/olivine makes an increase in tar yield by 19.2% compared to the silica sand, while a decrease in heavy oil fraction content by 17.0% compared to the olivine at 550 ℃. The yield of light oil can reach up to 5.1%, however, the content of light oil, phenol oil and naphthalene oil increases by 19. 6%, 17% and 15. 2%, respectively. Meanwhile, the content of H2 and CH4 in gaseous product is obviously decreased.

关 键 词：褐煤 快速热解 固体热载体 橄榄石 钴 

分 类 号：TQ523.6[化学工程—煤化学工程]