褐煤与高硫石油焦在CO2气化中的协同作用

IF 3.8 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Lirui Mao, Tao Liu, Yanlin Zhao, Mingdong Zheng
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引用次数: 1

摘要

摘要高硫石油焦(PC)作为一种固体废弃物,其处理成本较高。气化技术可以利用PC和褐煤进行共气化。二者有机结合是扩大气化原料适应性的关键。本工作使用热分析技术研究了PC和褐煤系统在CO2气氛中的气化反应。结果表明,褐煤/高硫PC共气化的起始和终止温度均低于纯焦炭。炭化速率和气化反应指数的提高表明褐煤的气化性能有所提高。气化协同因子均大于1,表明共气化过程产生了明显的协同作用,800°C后的气化阶段协同作用更为明显。随着温度的升高,褐煤灰在高硫PC表面逐渐富集,Ca和Fe元素具有明显的催化作用,但催化作用具有饱和值。褐煤灰烬用作多组分气化催化剂可以提高褐煤/高硫PC系统的整体反应性,从而拓宽气化原料的选择范围,并有效利用两者的资源特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synergism between lignite and high-sulfur petroleum coke in CO2 gasification
Abstract High-sulfur petroleum coke (PC) as solid waste has high treatment cost. Gasification technology can utilize PC and lignite for co-gasification. Organically combining the two is the key to expanding the adaptability of gasification raw materials. This work used thermal analysis technology to study the gasification reaction of PC and lignite systems in a CO2 atmosphere. The results show that the starting and end temperatures of the co-gasification of lignite/high-sulfur PC are lower than those of pure coke. The improved carbonization rate and gasification reaction index indicate that lignite improves the gasification performance. The gasification synergy factors are all greater than 1, indicating that the co-gasification process produces obvious synergism, and the synergism is more obvious in the gasification stage after 800°C. The lignite ash is gradually enriched on the surface of high-sulfur PC with the temperature increase, and the Ca and Fe elements have an obvious catalytic effect, but the catalytic effect has a saturation value. Ashes from lignite used as a multi-component gasification catalyst can increase the overall reactivity in the lignite/high-sulfur PC system, which can broaden the selection of gasification raw materials, and make efficient use of the resource characteristics of both.
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来源期刊
Green Processing and Synthesis
Green Processing and Synthesis CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
6.70
自引率
9.30%
发文量
78
审稿时长
7 weeks
期刊介绍: Green Processing and Synthesis is a bimonthly, peer-reviewed journal that provides up-to-date research both on fundamental as well as applied aspects of innovative green process development and chemical synthesis, giving an appropriate share to industrial views. The contributions are cutting edge, high-impact, authoritative, and provide both pros and cons of potential technologies. Green Processing and Synthesis provides a platform for scientists and engineers, especially chemists and chemical engineers, but is also open for interdisciplinary research from other areas such as physics, materials science, or catalysis.
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