Citation: MEI Yan-gang, WANG Zhi-qing, FANG Hui-bin, FENG Rong-tao, FANG Yi-tian. Comparison of leaching behaviors of aluminum in ash from combustion and catalytic gasification[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(4): 394-399. shu

Comparison of leaching behaviors of aluminum in ash from combustion and catalytic gasification

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: WANG Zhi-qing, qcumt@sxicc.ac.cn
Received Date: 10 November 2016
Revised Date: 11 January 2017

Fund Project: the Research Supported by the CAS/SAFEA International Partnership Program for Creative Research Teams and Youth Innovation Promotion Association 2014156the National Natural Science Foundation of China 21676289

Figures(9)

The leaching behaviors of aluminum in ash from combustion and catalytic gasification, and effects of Na₂CO₃ addition (0-15%), temperature (600-1 000℃) on Al leaching behaviors and mineral composition were investigated. The compositions of ash from combustion and gasification, and acid leaching residue were investigated by XRD. The results shows that the combustion ash is predominantly composed of mullite, while that from catalytic gasification is sodium aluminum silicate ((Na₂O)_0.33NaAlSiO₄). The Al extraction yield of combustion ash only reaches 40% at leaching conditions of 6 mol/L H₂SO₄, 60℃ and 30 min, while that of catalytic gasification ash with 10% Na₂CO₃ addition can reach 88%. The catalytic gasification with Na₂CO₃ addition can achieve higher Al extraction yield.
- catalytic gasification,
- coal ash,
- alumina extraction
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沈阳化工大学材料科学与工程学院沈阳 110142