Pressurized catalytic gasification of high ash fusion temperature coal: catalytic activity of K<sub>2</sub>CO<sub>3</sub> and potassium recovery

CHEN Zhaohui; LIU Lei; JIN Yadan; WU Lifeng; WU Heng; ZHAN Yueping; LI Kezhong; BI Jicheng

doi:10.11949/j.issn.0438-1157.20161678

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Pressurized catalytic gasification of high ash fusion temperature coal: catalytic activity of K₂CO₃ and potassium recovery

更新时间：2025-12-10

- Pressurized catalytic gasification of high ash fusion temperature coal: catalytic activity of K₂CO₃ and potassium recovery
- CIESC Journal Issue 5, Pages: 2155-2161(2017)
- 作者机构：
  
  1. 新奥科技发展有限公司煤基低碳能源国家重点实验室,河北,廊坊,065001
  2. 清华大学化学工程系,北京,100084
  3. 中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西,太原,030001
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161678
  CLC： Q530.2
- Online First：05 May 2017，
  
  Published：05 May 2017
- 稿件说明：
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CHEN Zhaohui, LIU Lei, JIN Yadan, et al. Pressurized catalytic gasification of high ash fusion temperature coal: catalytic activity of K₂CO₃ and potassium recovery[J]. CIESC Journal, 2017, (5): 2155-2161. DOI: 10.11949/j.issn.0438-1157.20161678.
DOI：

CHEN Zhaohui, LIU Lei, JIN Yadan, et al. Pressurized catalytic gasification of high ash fusion temperature coal: catalytic activity of K₂CO₃ and potassium recovery[J]. CIESC Journal, 2017, (5): 2155-2161. DOI: 10.11949/j.issn.0438-1157.20161678. DOI：

摘要

以高灰熔点煤和含钾催化剂的灰渣为研究对象，分别考察了加压固定床反应器中K2CO3催化半焦水蒸气气化的反应性和灰渣中钾催化剂的回收特性。实验结果表明煤中添加K2CO3能够促进碳的转化，随着K2CO3负载量和气化温度的增加，碳转化率增大，CH4收率增加。在3.5 MPa和800℃下，K2CO3负载量为15%时，碳转化率达到96.1%，CH4收率达到0.24 m3·（kg C）-1。灰渣中钾催化剂的回收率随碳转化率的增加先升高后减小，这与催化剂在灰渣中的存在方式有关。通过优化水洗和消解条件，高碳转化率下灰渣中的钾催化剂的总回收率高达96.5%。

Abstract

In this study

catalytic steam gasification of high ash fusion temperature coal using K2CO3 as catalyst was carried out in a pressurized fixed bed. The potassium catalyst recovery was also conducted via wash and digestion by Ca(OH)2. It turned out that increasing temperature and K2CO3 loading enhanced the carbon conversion and CH4 yield. At 800℃ and loading of 15% K2CO3

the carbon conversion reached 96.1% and CH4 yield was 0.24 m3·(kg C)-1. The potassium recovery increased to a peak as the carbon conversion rose and then declined

which was more relevant to existing forms of potassium with carbon and ash. By optimizing the conditions of wash and digestion

the potassium recovery in ash with high carbon conversion reached 96.5%.

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Pressurized catalytic gasification of high ash fusion temperature coal: catalytic activity of K2CO3 and potassium recovery

DOI：10.11949/j.issn.0438-1157.20161678

摘要

Abstract

关键词

Keywords

references

Pressurized catalytic gasification of high ash fusion temperature coal: catalytic activity of K₂CO₃ and potassium recovery