A Study on Detailed Mechanism of H<sub>2</sub>S Formation During Pulveri-ed Coal Combustion

doi:10.7652/xjtuxb202004009

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A Study on Detailed Mechanism of H₂S Formation During Pulveri-ed Coal Combustion

更新时间：2025-07-09

- A Study on Detailed Mechanism of H₂S Formation During Pulveri-ed Coal Combustion
- Vol. 54, Issue 4, Pages: 68-75(2020)
- 作者机构：
  
  太原理工大学电气与动力工程学院,太原,030024
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202004009
  CLC： TK224.1
- Online First：10 April 2020，
  
  Published：2020
- 稿件说明：
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A Study on Detailed Mechanism of H₂S Formation During Pulveri-ed Coal Combustion[J]. 2020, 54(4): 68-75. DOI: 10.7652/xjtuxb202004009.
DOI：

A Study on Detailed Mechanism of H₂S Formation During Pulveri-ed Coal Combustion[J]. 2020, 54(4): 68-75. DOI: 10.7652/xjtuxb202004009. DOI：

摘要

为从自由基层面揭示煤粉燃烧过程中H

S的生成机理

构建了由34个组分和115个基元反应构成的详细反应机理模型

并采用数值模拟和实验研究相结合的方法

验证了模型的可靠性

同时进行了主要含硫组分和重要自由基的生成速率分析以及H

S生成的敏感性分析。组分浓度分布的预测值与实验值的对比结果表明:CO

、CO、H

、H

S、SO

和COS的误差均小于5%

最大误差为25%

模型具有较高的可信度。生成速率分析显示:H

S主要通过基元反应H

S+HSH+H

、CS

OH

S+COS和COS+H

OH

S+CO

生成; SO

先被CO和H还原为SO、HOSO等

再转化为S、SH

并最终还原为H

S; CS

、COS也是H

S生成的重要来源

SH是H

S生成的关键自由基。敏感性分析说明:基元反应HOSO(+M)H+SO

(+M)、SO

+COSO+CO

、CS

OH

S+COS和COS+H

OH

S+CO

对H

S的浓度表现出较高的敏感性

较高的温度(>1 500 K)能够促进SO

、COS、CS

向H

S转化。该结果可为煤粉锅炉中高温腐蚀的预测提供理论依据。

Abstract

A detailed reaction mechanism model involving 34 species and 115 elementary reactions is developed to reveal the reaction mechanism of H

S formation during coal combustion from the level of free radical. Furthermore

numeric

al simulation and experimental methods are applied to verify the credibility of the model and to analy-e the rate-of-production(ROP)of main sulfur species and important free radicals

and the sensitivity of H

S formation. A comparison between the experimental and the predicated results shows that the errors of CO

and COS are all within 5%

and that the maximum error of CS

is 25%. Therefore

the model has a high reliability. Rate-of-production(ROP)analysis indicates that H

S is mainly generated via elementary reactions ofH

S+H-SH+H

O-H

S+COS

andCOS+H

O-H

S+CO

.SO

关键词

Keywords

references

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Related Author

马红和 1

李军 1

周璐 1

赵军 2

Related Institution

Department of Thermal Engineering, Taiyuan University of Technology

⁰

A Study on Detailed Mechanism of H2S Formation During Pulveri-ed Coal Combustion

DOI：10.7652/xjtuxb202004009

摘要

Abstract

关键词

Keywords

references

A Study on Detailed Mechanism of H₂S Formation During Pulveri-ed Coal Combustion