Circulating Fluidized Bed Gasification of Low Rank Coal: Influence of O-2/C Molar Ratio on Gasification Performance and Sulphur Transformation
文献类型：期刊论文
| 作者 | Zhang Haixia1; Zhang Yukui1,2; Zhu Zhiping1; Lu Qinggang1 |
| 刊名 | JOURNAL OF THERMAL SCIENCE
 |
| 出版日期 | 2016-08-01 |
| 卷号 | 25期号:4页码:363-371 |
| 关键词 | gasification circulating fluidized bed sulphur transformation O-2/C molar ratio |
| 英文摘要 | To promote the utilization efficiency of coal resources, and to assist with the control of sulphur during gasification and/or downstream processes, it is essential to gain basic knowledge of sulphur transformation associated with gasification performance. In this research we investigated the influence of O-2/C molar ratio both on gasification performance and sulphur transformation of a low rank coal, and the sulphur transformation mechanism was also discussed. Experiments were performed in a circulating fluidized bed gasifier with O-2/C molar ratio ranging from 0.39 to 0.78 mol/mol. The results showed that increasing the O-2/C molar ratio from 0.39 to 0.78 mol/mol can increase carbon conversion from 57.65% to 91.92%, and increase sulphur release ratio from 29.66% to 63.11%. The increase of O-2/C molar ratio favors the formation of H2S, and also favors the retained sulphur transforming to more stable forms. Due to the reducing conditions of coal gasification, H2S is the main form of the released sulphur, which could be formed by decomposition of pyrite and by secondary reactions. Bottom char shows lower sulphur content than fly ash, and mainly exist as sulphates. X-ray photoelectron spectroscopy (XPS) measurements also show that the intensity of pyrite declines and the intensity of sulphates increases for fly ash and bottom char, and the change is more obvious for bottom char. During CFB gasification process, bigger char particles circulate in the system and have longer residence time for further reaction, which favors the release of sulphur species and can enhance the retained sulphur transforming to more stable forms. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Thermodynamics ; Engineering, Mechanical |
| 研究领域[WOS] | Thermodynamics ; Engineering |
| 关键词[WOS] | COMPOUNDS ABATEMENT ; STEAM GASIFICATION ; SYNTHESIS GAS ; PILOT-SCALE ; BIOMASS ; PYROLYSIS ; GASIFIER ; WASTES ; XPS ; PREDICTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000379376500009 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/112492]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Haixia,Zhang Yukui,Zhu Zhiping,et al. Circulating Fluidized Bed Gasification of Low Rank Coal: Influence of O-2/C Molar Ratio on Gasification Performance and Sulphur Transformation[J]. JOURNAL OF THERMAL SCIENCE,2016,25(4):363-371. |
| APA | Zhang Haixia,Zhang Yukui,Zhu Zhiping,&Lu Qinggang.(2016).Circulating Fluidized Bed Gasification of Low Rank Coal: Influence of O-2/C Molar Ratio on Gasification Performance and Sulphur Transformation.JOURNAL OF THERMAL SCIENCE,25(4),363-371. |
| MLA | Zhang Haixia,et al."Circulating Fluidized Bed Gasification of Low Rank Coal: Influence of O-2/C Molar Ratio on Gasification Performance and Sulphur Transformation".JOURNAL OF THERMAL SCIENCE 25.4(2016):363-371. |
入库方式： OAI收割
来源：工程热物理研究所
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