中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Gas Upgrading in a Downdraft Fixed-Bed Reactor Downstream of a Fluidized-Bed Coal Pyrolyzer

文献类型:期刊论文

作者Zeng, Xi1; Wang, Yin1; Yu, Jian1; Wu, Shisheng2; Han, Jiangze1; Xu, Shaoping2; Xu, Guangwen1
刊名ENERGY & FUELS
出版日期2011-11-01
卷号25期号:11页码:5242-5249
关键词DRIED SEWAGE-SLUDGE BIOMASS GASIFICATION RAPID PYROLYSIS PERFORMANCE OPTIMIZATION PARTIAL OXIDATION TAR TEMPERATURE CATALYSTS GASIFIER CRACKING
ISSN号0887-0624
通讯作者Wang, Y
英文摘要A new two-stage gasification process, consisting of a fluidized-bed (FB) pyrolyzer and a downdraft fixed-bed (DFB) gasifier, has been proposed to gasify powder coal for fuel gas production with low tar generation. Aiming at developing the new technology, this paper investigated the means for coal pyrolysis gas upgrading, with the focus on tar removal by both thermal cracking with or without the presence of oxygen and catalytic cracking or reforming over a char bed in a fixed-bed reactor downstream of a FB coal pyrolyzer. The presence of oxygen and the adoption of a char bed evidently facilitated the tar removal performance and also improved the produced fuel gas quality. Analyzing the tar sample collected at the outlet of the tar removal reactor with gas chromatography-mass spectrometry (GC-MS) clarified that the oxidation by O(2) and the char-catalyzed reforming both exhibited certain selectivity to the tar-containing chemical species. In addition, the property of char played an important role on its catalytic activity. The higher the specific surface area, the better the activity of char for removing tar. The spent char showed a much reduced specific surface area of micropores but evidently elevated the specific surface area of mesopores, even by up to 3 times. The tests with the metal oxides impregnated onto the demineralized char demonstrated that both Ca and Fe oxides enabled better catalytic activity for tar removal than Na and Mg oxides. This study clarified as well that the viable operating conditions for tar removal in a char bed were at 1100 degrees C with an excessive air ratio (ER) of 0.04 and gas residence time above 1.3 s.
WOS标题词Science & Technology ; Technology
类目[WOS]Energy & Fuels ; Engineering, Chemical
研究领域[WOS]Energy & Fuels ; Engineering
关键词[WOS]DRIED SEWAGE-SLUDGE ; BIOMASS GASIFICATION ; RAPID PYROLYSIS ; PERFORMANCE OPTIMIZATION ; PARTIAL OXIDATION ; TAR ; TEMPERATURE ; CATALYSTS ; GASIFIER ; CRACKING
收录类别SCI
语种英语
WOS记录号WOS:000297001400040
公开日期2013-10-29
版本出版稿
源URL[http://ir.ipe.ac.cn/handle/122111/4360]  
专题过程工程研究所_多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Dalian Univ Technol, State Key Lab Fine Chem, Dept Chem Engn, Dalian 116012, Peoples R China
推荐引用方式
GB/T 7714
Zeng, Xi,Wang, Yin,Yu, Jian,et al. Gas Upgrading in a Downdraft Fixed-Bed Reactor Downstream of a Fluidized-Bed Coal Pyrolyzer[J]. ENERGY & FUELS,2011,25(11):5242-5249.
APA Zeng, Xi.,Wang, Yin.,Yu, Jian.,Wu, Shisheng.,Han, Jiangze.,...&Xu, Guangwen.(2011).Gas Upgrading in a Downdraft Fixed-Bed Reactor Downstream of a Fluidized-Bed Coal Pyrolyzer.ENERGY & FUELS,25(11),5242-5249.
MLA Zeng, Xi,et al."Gas Upgrading in a Downdraft Fixed-Bed Reactor Downstream of a Fluidized-Bed Coal Pyrolyzer".ENERGY & FUELS 25.11(2011):5242-5249.

入库方式: OAI收割

来源:过程工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。