Transformation of K<sub>2</sub>CO<sub>3</sub> as a catalyst during coal char pyrolysis and its effect on coal char catalytic gasification

WANG Xi-ming; ZHU Huai-li; WANG Xing-jun; LIU Hai-feng; YU Guang-suo; WANG Fu-chen

Volume 42 Issue 02

Feb. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(02): 175-180

WANG Xi-ming, ZHU Huai-li, WANG Xing-jun, LIU Hai-feng, YU Guang-suo, WANG Fu-chen. Transformation of K2CO3 as a catalyst during coal char pyrolysis and its effect on coal char catalytic gasification[J]. Journal of Fuel Chemistry and Technology, 2014, 42(02): 175-180.

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WANG Xi-ming, ZHU Huai-li, WANG Xing-jun, LIU Hai-feng, YU Guang-suo, WANG Fu-chen. Transformation of K₂CO₃ as a catalyst during coal char pyrolysis and its effect on coal char catalytic gasification[J]. Journal of Fuel Chemistry and Technology, 2014, 42(02): 175-180.

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Transformation of K₂CO₃ as a catalyst during coal char pyrolysis and its effect on coal char catalytic gasification

1.
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, China;
2.
Shanghai Engineering Research Center of Coal Gasification, Shanghai 200237, China

Received Date: 2013-06-28
Rev Recd Date: 2013-08-24
Publish Date: 2014-02-28

Abstract

Abstract

The transformation of K₂CO₃ in the course of Shenfu char catalytic pyrolysis under different temperatures was studied in the fixed-bed reactor; the influence of loading methods of K₂CO₃ and particle size on gasification reactivity was investigated in a TG-DSC analytical reactor. The results showed that with the increase of temperature, the effect of loading methods on gasification rate is weakened; K catalyst shows high dispersity by means of SEM/EDX analysis of pyrolysis residue. CO₂ and CO are produced through the interaction of K₂CO₃ and coal char in the pyrolysis and there is a linear relation between the amount of released gas and temperature. The particle size of K₂CO₃ and coal char has notable impact on gasification; the gasification rate increase with a thinner particle at 650 ℃. K₂CO₃ shows high mobility within the coal char phase at elevated temperature, which is consistent with its catalytic activities; the effect of loading methods on gasification should be considered under a temperature below 700 ℃.
- potassium carbonate,
- mobility,
- catalytic gasification,
- loading method,
- particle size

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References(15)

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