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

CHEN Fan-min; WANG Xing-jun; WANG Xi-ming; ZHOU Zhi-jie

Volume 41 Issue 03

Mar. 2013

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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(03): 265-270.

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(03): 265-270.

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

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

Received Date: 2012-08-30
Rev Recd Date: 2012-10-27
Publish Date: 2013-03-30

Abstract

Abstract

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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References(13)

References

KITSUKA T, BAYARSAIKHAN B, SONOYAMA N. Behavior of inherent metallic species as a crucial factor for kinetics of steam gasification of char from coal pyrolysis[J]. Energy Fuel, 2007, 21(2): 387-394.

LI C Z. Some recent advances in the understanding of the pyrolysis and gasification behaviour of Victorian brown coal[J]. Fuel, 2007, 86(12/13): 1664-1683.

QUYN D M, HAYASHI J, LI C Z. Volatilisation of alkali and alkaline earth metallic species during the gasification of a Victorian brown coal in CO₂[J]. Fuel Process Technol, 2005, 86(12): 1241-1251.

林驹, 张济宇, 钟雪晴. 黏胶废液对福建无烟煤水蒸气催化气化的动力学和补偿效应[J]. 燃料化学学报, 2009, 37(4): 398-404. (LIN Ju, ZHANG Ji-yu, ZHONG Xue-qing. Kinetics and compensation effects during steam gasification of Fujian anthracite using viscose liquor as catalyst[J]. Journal of Fuel Chemistry and Technology, 2009, 37(4): 398-404.)

杨景标, 蔡宁生, 张彦文. 催化剂添加量对褐煤焦水蒸气气化反应性的影响[J]. 燃料化学学报, 2008, 36(1): 15-22. (YANG Jing-biao, CAI Ning-sheng, ZHANG Yan-wen. Effect of catalyst loading on the gasification reactivity of a lignite char with steam[J]. Journal of Fuel Chemistry and Technology, 2008, 36(1): 15-22.)

OHTSUKA Y, ASAMI K J. Ion-exchanged calcium from calcium carbonate and low-rank coals: High catalytic activity in steam gasification[J]. Energy Fuel, 1996, 10(2): 431-435.

HAYASHI J I, IWATSUKI M, MORISHITA K, TSUTSUMI A, LI C Z, CHIBA T. Roles of inherent metallic species in secondary reactions of tar and char during rapid pyrolysis of brown coals in a drop-tube reactor[J]. Fuel, 2002, 81(15): 1977-1987.

战书鹏, 王兴军, 洪冰清, 于广锁, 王辅臣. 褐煤催化加氢气化实验[J]. 燃料化学学报, 2012, 40(1): 8-14. (ZHAN Shu-peng, WANG Xing-jun, HONG Bing-qing, YU Guang-suo, WANG Fu-chen. Experimental study on catalytic hydrogasification of lignite[J]. Journal of Fuel Chemistry and Technology, 2012, 40(1): 8-14.)

HUHN F, KLEIN J, JÜNTGEN H. Investigations on the alkali-catalysed steam gasification of coal: Kinetics and interactions of alkali catalyst with carbon[J]. Fuel, 1983, 62(2): 196-199.

MOULIJN J A, KAPTEIJN F. Towards a unified theory of reactions of carbon with oxygen-contain molecules[J]. Carbon, 1995, 33(8): 1155-1165.

KARIMI A, SEMGINA N, GRAY M R. Kinetics of catalytic steam gasification of bitumen coke[J]. Fuel, 2011, 90(3): 1285-1291.

LINARES-SOLANO A, LOZANO-CASTELLÓD, LILLO-RÓDENAS M A, CAZORLA-AMORS D. Carbon activation by alkaline hydroxides: Preparation and reactions, porosity and performance[J]. Chem Phys Carbon, 2007, 30(1): 1-62.

HUTTINGER K J, MINGES R. Influence of the catalyst precursor anion in catalysis of water vapour gasification of carbon by potassium: 1 Activation of the catalyst precursors[J]. Fuel, 1986, 65(8): 1112-1121.

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