橄榄石基固体热载体影响褐煤热解产物分布的分析

邓靖; 李文英; 李晓红; 喻长连; 冯杰; 郭小汾

橄榄石基固体热载体影响褐煤热解产物分布的分析

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

基金项目: 国家高技术研究发展计划(863计划, 2011AA05A202).

详细信息

通讯作者:
李文英

中图分类号: TQ523.6
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出版历程
- 收稿日期: 2013-05-29
- 修回日期: 2013-06-24
- 刊出日期: 2013-08-30

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

1.
State Key Laboratory Training Base of Coal Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
2.
National Institute of Clean-and-Low-Carbon Energy, Beijing 102209, China

摘要

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.
- 褐煤 /
- 快速热解 /
- 固体热载体 /
- 橄榄石 /
- 钴
Abstract: 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.
- lignite /
- fast pyrolysis /
- solid heat carrier /
- olivine /
- cobalt

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