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author:

Li, Baoxia (Li, Baoxia.) [1] | Zhang, Jiyu (Zhang, Jiyu.) [2] (Scholars:张济宇)

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Abstract:

The effects of calcination temperature, time and additives on the alkali content of coal-cinder from the catalytic gasification of pulverized anthracite were examined by using the static calcination method in a laboratory high temperature furnace in this study. The results indicated that the optimum calcination temperature and time were respectively 870°C and 30 min, and the optimum dealkalization additive is kaolinite. By adding only 5% kaolinite in the calcination process, the dealkalization rate could be increased to 100%. Most importantly, with analyzing the calcined cinder by X-ray powder diffraction (XRD) and scanning electron microscope (SEM), it was clear that at an appropriate calcination temperature, the activated SiO2 and Al2O3 in alkaline coal-cinder would react with the decomposed fused Na2CO3 to form a new neutral matter nepheline (NaAlSiO4) and other amorphous silicate compounds, causing an obvious reduction of the alkali content in coal-cinder.

Keyword:

Additives Amorphous materials Anthracite Calcination Catalysis Coal ash Coal pulverizers Gasification Scanning electron microscopy Silicates X ray powder diffraction

Community:

  • [ 1 ] [Li, Baoxia]Institute of Chemical Engineering and Technology, Fuzhou University, Fuzhou 350002, China
  • [ 2 ] [Li, Baoxia]College of Chemical Engineering, Qingdao University, Qingdao 266071, China
  • [ 3 ] [Zhang, Jiyu]Institute of Chemical Engineering and Technology, Fuzhou University, Fuzhou 350002, China

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Source :

Journal of Chemical Industry and Engineering (China)

ISSN: 0438-1157

CN: 11-1946/TQ

Year: 2006

Issue: 11

Volume: 57

Page: 2616-2623

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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