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
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