Influence of temperature and Ca(OH)<sub>2</sub> on releasing tar and coal gas during lignite coal pyrolysis and char gasification

Sunel Kumar; Zhihua Wang; Zhang Kang; Jun Xia; Ronald Whiddon; Yong He; Jaffri Gul-e-Rana; Zain Ali Saleh Bairq; Kefa Cen

doi:10.1016/j.cjche.2019.05.013

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Influence of temperature and Ca(OH)₂ on releasing tar and coal gas during lignite coal pyrolysis and char gasification

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Influence of temperature and Ca(OH)₂ on releasing tar and coal gas during lignite coal pyrolysis and char gasification
- Chinese Journal of Chemical Engineering Vol. 27, Issue 11, Pages: 2788-2798(2019)
- Affiliations：
  
  1. State Key Laboratory of Clean Energy Utilization, Zhejiang University,Hangzhou,China,310027
  2. Department of Mechanical, Aerospace and Civil Engineering, Brunel University London, Uxbridge,UK,UB8 3PH
  3. Fuel Research Centre, PCSIR,Karachi,Pakistan,75280
  4. College of Chemistry and Chemical Engineering, Hunan University,Changsha,China,410082
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.05.013
  CLC：
- Published：2019
- Accepted：
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on releasing tar and coal gas during lignite coal pyrolysis and char gasification[J]. 中国化学工程学报, 2019, 27(11): 2788-2798.
DOI：

on releasing tar and coal gas during lignite coal pyrolysis and char gasification[J]. 中国化学工程学报, 2019, 27(11): 2788-2798. DOI： 10.1016/j.cjche.2019.05.013.

摘要

Abstract

The yield of tar and syngas has been investigated by catalytic pyrolysis of Pingzhuang lignite (PZL) over Ca(OH)

catalyst in temperature range of 600℃-1000℃ in a tube furnace. The results show that the yield of volatile pyrolysis increases and char decreases with rising temperature for both raw and catalyzed Pingzhuang lignite. The hydrogen fraction (H

) increased from 20% to 40% for the PZL sample; but

for the PZL-Ca(OH)

sample

fraction fluctuated randomly between 35% to 42%

with the maximum H

fraction found at 1000℃. The Gaschromatography mass-spectroscopic (GC-MS) analysis revealed that the maximum tar yield at 800℃ and 700℃ was obtained for PZL and PZL-Ca(OH)

respectively. The surface morphology of PZL and PZL-Ca(OH)

chars underwent different transformation in the presence of catalyst as illustrated by SEM/EDX

FTIR

and BET analysis. Furthermore

char sample was investigated for the carbon conversion and reactivity index using TGA analysis under N

and CO atmosphere.

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⁰

Influence of temperature and Ca(OH)2 on releasing tar and coal gas during lignite coal pyrolysis and char gasification

DOI：10.1016/j.cjche.2019.05.013

摘要

Abstract

关键词

Keywords

references

Influence of temperature and Ca(OH)₂ on releasing tar and coal gas during lignite coal pyrolysis and char gasification