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Simultaneous production of CH4-rich syngas and high-quality tar from lignite by the coupling of noncatalytic/catalytic pyrolysis and gasification in a pressurized integrated fluidized bed
Chen, Zhaohui1,2; Gao, Shiqiu1; Xu, Guangwen1
2017-12-15
发表期刊APPLIED ENERGY
ISSN0306-2619
卷号208期号:00页码:1527-1537
摘要

An integrated fluidized bed (IFB) reactor with a two-stage configuration has been developed to process small-size coal particles for the simultaneous production of CH4-rich syngas and high-quality tar, in which coal pyrolysis occurred in an upper transport bed (TB) within an atmosphere mixing steam and syngas generated by steam oxygen gasification of coal or char in a lower fluidized bed (FB). The coupling effect was investigated by combining non-catalytic/catalytic pyrolysis and gasification in a pressurized IFB. Having TB pyrolysis obviously raised CH4 yield (also its content in producer gas) and tar yield. The respective contributions to CH4 formation from the TB pyrolysis and FB gasification were mainly relevant to operating pressure and Ca(OH)(2) catalyst. Raising pressure facilitated CH4 formation. When lignite was treated without catalyst, the contribution from TB pyrolysis was greater than that from FB gasification as hydropyrolysis was intensified by pressure in H-2-rich gas atmosphere from the FB gasifier. Adding catalyst into lignite reversed their contributions. The FB catalytic gasification formed more CH4 because Ca(OH)(2) functioned well as a catalyst for CH4 formation in pressurized gasification. With elevated pressure or/and the addition of Ca(OH)(2), pyrolysis tar yield decreased in different degrees but its quality was improved. With the combination effect of pressure and Ca(OH)(2), producer gas from the tested IFB reactor was highly rich in CH4 to reach 10.8 vol%, with as well a high H-2/CO ratio of 2.3 that is suitable for making SNG. The obtained tar had its light tar content as high as 95 wt%.

关键词Coal Pyrolysis Catalytic Gasification Integrated Fluidized Bed Coupling Ch4-rich Syngas
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.apenergy.2017.08.227
收录类别SCI
语种英语
关键词[WOS]Volatile-char Interactions ; Alkaline-earth Metals ; Victorian Brown-coal ; Lurgi Fbdb Gasifier ; In-situ Destruction ; Low-rank Coal ; Steam Gasification ; Exergy Analysis ; Reaction Zones ; Particle-size
WOS研究方向Energy & Fuels ; Engineering
WOS类目Energy & Fuels ; Engineering, Chemical
项目资助者National Key Research and Development Program of China(2016YFB0600304)
WOS记录号WOS:000416300400114
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23483
专题研究所(批量导入)
通讯作者Gao, Shiqiu; Xu, Guangwen
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
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GB/T 7714
Chen, Zhaohui,Gao, Shiqiu,Xu, Guangwen. Simultaneous production of CH4-rich syngas and high-quality tar from lignite by the coupling of noncatalytic/catalytic pyrolysis and gasification in a pressurized integrated fluidized bed[J]. APPLIED ENERGY,2017,208(00):1527-1537.
APA Chen, Zhaohui,Gao, Shiqiu,&Xu, Guangwen.(2017).Simultaneous production of CH4-rich syngas and high-quality tar from lignite by the coupling of noncatalytic/catalytic pyrolysis and gasification in a pressurized integrated fluidized bed.APPLIED ENERGY,208(00),1527-1537.
MLA Chen, Zhaohui,et al."Simultaneous production of CH4-rich syngas and high-quality tar from lignite by the coupling of noncatalytic/catalytic pyrolysis and gasification in a pressurized integrated fluidized bed".APPLIED ENERGY 208.00(2017):1527-1537.
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