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Title: Transformation Characteristics of Sodium of Zhundong Coal Combustion/Gasification in Circulating Fluidized Bed
Author: Song GuoLiang(宋国良)1; Song WeiJian(宋维健)1, 2; null(齐晓宾)1, 2; Lu, Qinggang1
Source: ENERGY & FUELS
Issued Date: 2016-04-01
Volume: 30, Issue:4, Pages:3473-3478
DOI: 10.1021/acs.energyfuels.6b00028
DOC Type: Article
English Abstract: In this study, the transformation characteristics of sodium in Zhundong coal were investigated, following its combustion (oxidizing atmosphere) and gasification (reducing atmosphere) in a circulating fluidized bed (CFB) experimental system of 0.25 t/d high alkali coal thermochemical conversion. The equilibrium distribution of Na is predicted under the oxidizing and reducing atmospheres by the thermodynamic equilibrium calculation. Na in bottom ash and fly ash evidently decreases as the temperature increases in both the combustion and gasification processes. More Na is retained in the ash during the gasification process. Na exists as sodium aluminosilicate in both combustion bottom ash and gasification bottom ash, and mainly as sodium sulfate (Na2SO4) in combustion fly ash and sodium chloride (NaCl) in gasification fly ash. Na undergoes different transformation processes through combustion and gasification. Gaseous metallic sodium, Na2O and NaCl are released from the coal and condense directly on the cold tube surface during gasification. When SO2 is present, Na reacts with it, forming a large amount of gaseous sodium sulfates during combustion.
WOS Headings: Science & Technology ; Technology
WOS Subject: Energy & Fuels ; Engineering, Chemical
WOS Subject Extended: Energy & Fuels ; Engineering
WOS Keyword Plus: VICTORIAN BROWN-COAL ; LOW-RANK COAL ; ASH DEPOSITION ; FIRED BOILER ; CO2 GASIFICATION ; CHAR REACTIVITY ; BITUMINOUS COAL ; FOSSIL-FUELS ; PYROLYSIS ; ALKALI
Indexed Type: SCI
Funder: Strategic Priority Research Program of the Chinese Academy of Sciences(XDA07030100) ; International Science & Technology Cooperation Program of China(2014DFG61680)
Language: 英语
WOS ID: WOS:000374804400100
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112508
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Song, Guoliang,Song, Weijian,Qi, Xiaobin,et al. Transformation Characteristics of Sodium of Zhundong Coal Combustion/Gasification in Circulating Fluidized Bed[J]. ENERGY & FUELS,2016,30(4):3473-3478.
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文件名: Transformation Characteristics of Sodium of Zhundong Coal CombustionGasification in Circulating Fluidized Bed .pdf
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