K<sub>2</sub>CO<sub>3</sub>催化剂在煤焦热解中的形态转变及其对煤焦催化气化的影响

王西明; 竹怀礼; 王兴军; 刘海峰; 于广锁; 王辅臣

K₂CO₃催化剂在煤焦热解中的形态转变及其对煤焦催化气化的影响

王西明¹,
竹怀礼¹,
王兴军^1,2,,
刘海峰^1,2,
于广锁^1,2,
王辅臣^1,2

1.
华东理工大学煤气化及能源化工教育部重点实验室, 上海 200237;
2.
上海煤气化工程技术研究中心, 上海 200237

基金项目: 国家重点基础研究发展规划（973计划，2010CB227000）。

详细信息

通讯作者:
王兴军，E-mail：wxj@ecust.edu.cn，Tel：021-64250734。

中图分类号: TQ546
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出版历程
- 收稿日期: 2013-06-28
- 修回日期: 2013-08-24
- 刊出日期: 2014-02-28

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

摘要

摘要: 在固定床中考察了不同温度下神府煤焦催化热解中K₂CO₃的转变形态，以及在TG-DSC分析仪上研究了K₂CO₃添加方式和粒径对其气化速率的影响。结果表明，随着气化温度的升高，催化剂的添加方式对煤焦气化反应速率的影响减弱；对热解残渣的SEM/EDX谱图显示，随着温度升高，K催化剂在煤焦中能展现更好的分散性；在热解过程中，煤焦中的碳通过与K₂CO₃反应释放出CO₂和CO，生成的气体量与温度相关；在较低温度650 ℃下，不同粒径对气化效果影响差别较大，粒径越小气化反应性越好。K₂CO₃的流动性随着温度升高而增强，催化活性也越强；低于700 ℃时，要考虑添加方式对气化反应性的影响。
- 碳酸钾 /
- 流动 /
- 催化气化 /
- 添加方式 /
- 粒径
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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