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High quality syngas production from catalytic coal gasification using disposable Ca(OH)(2) catalyst
Chen, Zhaohui1; Dun, Qimeng2; Shi, Yong1; Lai, Dengguo1; Zhou, Yang1; Gao, Shiqiu1; Xu, Guangwen1

This study works on the production of high H-2/CO mole ratio and CH4-rich syngas suitable for methane synthesis from catalytic coal gasification using inexpensive and disposable Ca(OH)(2) in a fluidized bed with a continuous coal feeding rate of 1.2 kg/h. Experiments conducted at atmospheric pressure demonstrated that carbon conversion and gas yield increased markedly after loading Ca(OH)(2) into lignite, while CH4 yield was almost constant. Increasing excess oxygen ratio (ER), steam to carbon mole ratio (S/C) and catalytic gasification temperature could increase carbon conversion but went against CH4 production. At atmosphere pressure, CH4 was mainly derived from coal pyrolysis and raising carbon conversion thus led to the reduction of CH4 content in syngas. Elevating gasification pressure exhibited a significant effect in raising carbon conversion and encouraging CH4 formation. Increasing S/C and pressure as well as reducing ER and gasification temperature were beneficial to raise H-2/CO mole ratio in syngas. At 1.5 MPa, under conditions of ER = 0.050, S/C = 1.00 and gasification temperature of 800 degrees C, catalytic coal gasification achieved good results with carbon conversion of about 70.0% and CH4 yield of 0.142 N m(3)/kg-coal. And its producer gas, with the best H-2/CO mole ratio of about 3.0, was highly rich in CH4 with its content of 10.1 vol.% well matched in terms of SNG production. (C) 2017 Elsevier B.V. All rights reserved.

KeywordCatalytic Gasification Coal High Quality Syngas Disposable Catalyst Ca(Oh)(2) Ch4
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordIntegrated Fluidized-bed ; Low-rank Coal ; Steam Gasification ; Calcium Hydroxide ; Mineral Matter ; Brown-coal ; Pyrolysis ; Methane ; Char ; Potassium
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(21376250 ; U1302273)
WOS IDWOS:000398985200088
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Hebei Univ Technol, Sch Chem Engn, Tianjin 300130, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zhaohui,Dun, Qimeng,Shi, Yong,et al. High quality syngas production from catalytic coal gasification using disposable Ca(OH)(2) catalyst[J]. CHEMICAL ENGINEERING JOURNAL,2017,316:842-849.
APA Chen, Zhaohui.,Dun, Qimeng.,Shi, Yong.,Lai, Dengguo.,Zhou, Yang.,...&Xu, Guangwen.(2017).High quality syngas production from catalytic coal gasification using disposable Ca(OH)(2) catalyst.CHEMICAL ENGINEERING JOURNAL,316,842-849.
MLA Chen, Zhaohui,et al."High quality syngas production from catalytic coal gasification using disposable Ca(OH)(2) catalyst".CHEMICAL ENGINEERING JOURNAL 316(2017):842-849.
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