CO2与H2O对煤炭急速气化反应活性的影响分析

王倩倩; 李治刚; 郭红光; 王明远; 佐佐木久郎

CO2与H2O对煤炭急速气化反应活性的影响分析

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- 发布日期: 2020-08-19

Analysis of the Influence of CO2 and H2O on Coal Rapid Gasification Reactivity

摘要

摘要: 为探讨煤气化反应过程中合成气CO和碳氢化合物(HCs)的产量,以及水对煤气化反应活性的影响,应用自制的CO2激光束以200 ℃/s的急速加热系统在CO2富集环境中(O2浓度≤10%),通过改变实验的升温速率、氧气浓度及煤样润湿度等条件,进行了煤的气化与燃烧特性实验。实验结果表明:在煤的气化与燃烧过程中,随着加热温度的升高,煤样的质量损失与合成气的产量不断增加,且煤样的质量损失与转化气体环境之间的关系为Air>富CO2>富N2;在富CO2气体环境中,随着加热温度的升高,O2浓度5%环境的CO气体和HCs气体的产量相对较大;此外发现CO气体生成量相对降低,而HCs生成量相对增加,这一结果表明煤在CO2富集气体环境的气化燃烧过程中,CO气体的生成主要依赖于O2浓度,而HCs的生成则主要依赖于H2O。
- 气化燃烧 /
- CO2富集环境 /
- 急速加热 /
- 合成气 /
- 气化反应活性
Abstract: In order to discuss the production of syngas CO and hydrocarbons (HCs) and the effect of water on coal gasification reactivity, the　gasification and combustion characteristics of coal were tested in a CO2 enrichment environment (O2 concentration≤10%) using a self-made CO2 laser beam with a 200 °C/s rapid heating system by changing the heating rate, oxygen concentration and moisture content of coal samples. The experimental results show that with the increase of heating temperature in the process of coal gasification and combustion, the mass loss of coal sample and the output of syngas increases continuously, and the relationship between the mass loss of coal sample and the transformed gas environment is air atmosphere>CO2-rich atmosphere> N2-rich atmosphere. On the other hand, in a CO2-rich gas environment, with the increase of heating temperature, the production of CO gas and HCs gas at 5%O2 concentration is relatively large. In addition, it is found that the amount of CO gas generated is relatively reduced, while the amount of HCs generated is relatively increased. This result shows that during the gasification and combustion of coal in CO2 enriched gas environment, the generation of CO gas mainly depends on O2 concentration, while the generation of HCs mainly depends on H2O.
- gasification and combustion /
- 　CO2-rich atmosphere /
- rapid heating /
- syngas /
- gasification reactivity

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