Indirect sulfation characteristics of limestone under O<sub>2</sub>/H<sub>2</sub>O combustion atmosphere

LÜ Chen; LIU Xiaowei; GUO Junzhe; ZHANG Penghui; XU Minghou

doi:10.11949/j.issn.0438-1157.20161246

您当前的位置：

首页 >

文章列表页 >

Indirect sulfation characteristics of limestone under O₂/H₂O combustion atmosphere

更新时间：2025-11-26

- Indirect sulfation characteristics of limestone under O₂/H₂O combustion atmosphere
- CIESC Journal Issue 1, Pages: 353-359(2017)
- 作者机构：
  
  华中科技大学煤燃烧国家重点实验室,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161246
  CLC： 511
- Online First：05 January 2017，
  
  Published：05 January 2017
- 稿件说明：
移动端阅览
LÜ Chen, LIU Xiaowei, GUO Junzhe, et al. Indirect sulfation characteristics of limestone under O₂/H₂O combustion atmosphere[J]. CIESC Journal, 2017, (1): 353-359. DOI: 10.11949/j.issn.0438-1157.20161246.
DOI：

LÜ Chen, LIU Xiaowei, GUO Junzhe, et al. Indirect sulfation characteristics of limestone under O₂/H₂O combustion atmosphere[J]. CIESC Journal, 2017, (1): 353-359. DOI: 10.11949/j.issn.0438-1157.20161246. DOI：

摘要

利用水平管式炉和热重实验台架，对O2/H2O、O2/N2和O2/CO2 3种不同燃烧方式下石灰石的间接硫化反应特性进行了研究。重点探究了燃烧方式、水蒸气浓度对石灰石间接硫化反应的影响规律与机理。同时，对硫化产物进行了X射线荧光光谱（XRF）、X射线衍射（XRD）、孔结构特性和扫描电镜（SEM）分析。结果表明，O2/H2O燃烧方式相比于相同氧浓度下的O2/N2和O2/CO2燃烧方式，石灰石间接硫化反应的钙转化率在化学反应控制阶段基本相同，在扩散控制阶段O2/H2O燃烧方式下的钙转化率有显著的提高。主要原因是水蒸气促进了硫化反应后期产物层内的固态离子扩散。此外，O2/H2O燃烧方式下，不同的水蒸气浓度对石灰石的钙转化率基本没有影响。

Abstract

A tube furnace(TF) and thermogravimetric analyzer(TGA) were used to investigate the indirect sulfation of limestone under O2/H2O combustion compared with O2/N2 and O2/CO2 combustion.It focused on the effects of combustion atmosphere and steam concentration on the calcium conversion ratio of the limestone.Besides

the sulfated products were collected for X-ray fluorescence(XRF)

X-ray powder diffraction(XRD)

pore structure characteristics and scanning electron microscopy(SEM) analysis.The results indicate that the indirect sulfation reaction has a negligible difference at the kinetically-controlled stage under different atmosphere but it is greatly enhanced at the diffusion-controlled stage under O2/H2O atmosphere compared with O2/N2 and O2/CO2 atmosphere.This is due to the fact that the presence of steam promotes the solid-state diffusion in the product layer.Besides

the calcium conversion ratio has no obvious increase when increasing the concentration of steam under O2/H2O atmosphere.

关键词

Keywords

references

Views

266

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Combustion characteristics of syngas under oxygen steam conditions

Life-cycle greenhouse gas emissions and cost of potassium extraction and CO2 mineralization via K-feldspar—industrial solid waste calcination

Influence mechanism of H2S on reactivity of NiFe2O4 oxygen carriers for chemical looping combustion

O2 generation path in Fe2+/H2O2 system

Characterization and modeling of limestone calcination and sulfation in oxy-fuel combustion atmosphere

Related Author

SUN Shaozeng

MENG Shun

ZHAO Yijun

XU Huanhuan

GUO Yangzhou

LIU Mo

QIN Yukun

MO Chun

Related Institution

National Engineering Laboratory for Reducing Emissions from Coal Combustion

School of Energy Science and Engineering, Harbin Institute of Technology

Institute of New Energy and Low-Carbon Technology

School of Chemical Engineering, Sichuan University

Institute of Civil Engineering & Architecture, Northeast Petroleum University

⁰

Indirect sulfation characteristics of limestone under O2/H2O combustion atmosphere

DOI：10.11949/j.issn.0438-1157.20161246

摘要

Abstract

关键词

Keywords

references

Indirect sulfation characteristics of limestone under O₂/H₂O combustion atmosphere