Citation: CHEN Fan-min, WANG Xing-jun, WANG Xi-ming, ZHOU Zhi-jie. Transformation of potassium during catalytic gasification of coal and the effect on gasification[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(3): 265-270. shu

Transformation of potassium during catalytic gasification of coal and the effect on gasification

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

Corresponding author: WANG Xing-jun,
Received Date: 30 August 2012
Available Online: 27 October 2012
Fund Project: 国家重点基础研究发展规划(973计划,2010CB227000)。 (973计划,2010CB227000)

The transformation of potassium during pyrolysis and gasification was studied in a fixed bed. The effects of potassium based catalyst on the steam gasification reactivity and the transformation of potassium were investigated by TG-DSC. Results show that all the potassium carbonate loaded by either impregnation or mechanical mixing has a marked catalytic effectiveness. The reactivity of Shenfu char increases with potassium loadings up to a saturation loading of about 10%. The catalytic effect has a maximum value. The transformation of potassium and the amount of potassium intermediate have been confirmed during pyrolysis and gasification. And the reactivity of chars depends on the amount of potassium intermediate. Potassium carbonate has an obvious catalytic effect, and potassium chloride has a poor catalytic effect. However, the catalytic effect of potassium sulfate increases obviously with the increasing of temperature in the range of 700～800℃.
- catalytic gasification,
- potassium carbonate,
- potassium chloride,
- potassium sulfate,
- transformation of potassium
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沈阳化工大学材料科学与工程学院沈阳 110142