Influence of O<sub>2</sub>/CO<sub>2</sub> combustion on interaction of Ca and Fe in Shenhua coal

WU Le; WU Jianqun; YU Dunxi; YAO Hong; XU Minghou

doi:10.11949/j.issn.0438-1157.20141162

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Influence of O₂/CO₂ combustion on interaction of Ca and Fe in Shenhua coal

更新时间：2025-12-10

- Influence of O₂/CO₂ combustion on interaction of Ca and Fe in Shenhua coal
- CIESC Journal Issue 2, Pages: 753-758(2015)
- 作者机构：
  
  1. 广东电网公司电力科学研究院,广东,广州,510080
  2. 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.0438-1157.20141162
  CLC： K124
- Online First：05 February 2015，
  
  Published：05 February 2015
- 稿件说明：
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WU Le, WU Jianqun, YU Dunxi, et al. Influence of O₂/CO₂ combustion on interaction of Ca and Fe in Shenhua coal[J]. CIESC Journal, 2015, (2): 753-758. DOI: 10.11949/j.issn.0438-1157.20141162.
DOI：

WU Le, WU Jianqun, YU Dunxi, et al. Influence of O₂/CO₂ combustion on interaction of Ca and Fe in Shenhua coal[J]. CIESC Journal, 2015, (2): 753-758. DOI: 10.11949/j.issn.0438-1157.20141162. DOI：

摘要

选用高Ca、高Fe含量的神华煤

在沉降炉系统中进行空气以及O2/CO2燃烧实验。利用X射线荧光探针(XRF)、X射线衍射仪(XRD)、先进计算机控制扫描电镜(CCSEM)分别对总灰元素、晶相组成以及主要矿物元素的共生特性进行深入表征。结果表明氧/燃料燃烧促进了Fe、Ca与其他矿物元素的交互反应

总灰中Fe在Fe-rich类矿物分布减少

而在铁铝硅酸盐(Fe-alsil)

尤其是在Fe与Ca发生交互反应的Fe+Ca类矿物的分布增加

同时Ca也存在类似的分布规律。对总灰中Fe+Ca类矿物深入分析发现

氧/燃料燃烧条件下总灰中Fe+Ca类矿物结渣倾向更严重(Fe2O3/CaO摩尔比为0.5～3)。

Abstract

Shenhua coal

with high concentration of Ca and Fe

was subjected to combustion in the drop tube furnace (DTF) in both air and O2/CO2 atmosphere. XRF

XRD and CCSEM were used to characterize elemental composition

mineralogy and element symbiotic properties of bulk ash. Oxy-fuel combustion promoted interaction of Fe and Ca with other minerals. However

the amount of Fe distributed in iron aluminosilicate (Fe-alsil)

especially in Fe+Ca minerals increased. The same distribution tendency of Ca was observed. Further analysis found that Fe+Ca mineral in oxy-fuel combustion bulk ash had more serious slagging propensity (with Fe2O3/CaO mole ratios 0.5—3) than that in air combustion bulk ash.

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Related Author

FAN Bin

YU Dunxi

ZENG Xianpeng

LÜ Weizhi

WU Jianqun

XU Minghou

WU Le

LUO Jia

Related Institution

State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology

School of Materials Science and Engineering, Jingdezhen Ceramic Institute

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Department of Chemical Engineering and Institute for Clean and Secure Energy, University of Utah

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Influence of O2/CO2 combustion on interaction of Ca and Fe in Shenhua coal

DOI：10.11949/j.issn.0438-1157.20141162

摘要

Abstract

关键词

Keywords

references

Influence of O₂/CO₂ combustion on interaction of Ca and Fe in Shenhua coal