Citation: WANG Xing-jun, CHEN Fan-min, LIU Hai-feng, YU Guang-suo, WANG Fu-chen. Interaction of potassium with mineral matter in coal during steam gasification[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(1): 9-13. shu

Interaction of potassium with mineral matter in coal during steam 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 & Technology, Shanghai 200237, China

Corresponding author: WANG Xing-jun,
Received Date: 27 July 2012
Available Online: 10 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 catalysis of potassium carbonate on the steam gasification of coals was investigated in a fixed-bed reactor. The interaction of potassium with mineral matter in ten coals was examined. The gasification residue after leaching with water was analysed by X-ray diffraction (XRD) and X-ray fluorescence (XRF). The results show that potassium aluminum silicate is the major crystallite derived from the interaction of potassium with mineral matter. As the ash is in low calcium content, the molar ratio of non-recoverable potassium to aluminum is one. However, as the ash is in high calcium content, the calcium can fix a large number of aluminum in the form of gehlenite (Ca₂Al₂SiO₇), which would inhibit the deactivation of potassium.
- catalytic gasification,
- mineral matter,
- potassium carbonate,
- deactivation
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沈阳化工大学材料科学与工程学院沈阳 110142