Citation: DENG Jing, LI Wen-ying, LI Xiao-hong, YU Chang-lian, FENG Jie, GUO Xiao-fen. Product distribution of lignite pyrolysis with olivine-based solid heat carrier[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(8): 937-942. shu

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

1.
1. State Key Laboratory Training Base of Coal Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China;

Corresponding author: LI Wen-ying,
Received Date: 29 May 2013
Available Online: 24 June 2013
Fund Project: 国家高技术研究发展计划(863计划, 2011AA05A202). (863计划, 2011AA05A202)

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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