Study on the equilibrium constants and initial formation temperature of NH4HSO4 and (NH4)2SO4 in coal-fired flue gas

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Xinfeng Yu, Zhuo Chen, Wentao Du, Rongyu Shao, Hao Zhou
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引用次数: 0

Abstract

With the development and utilization of high-sulfur coal, generating ammonium bisulfate (ABS) and ammonium sulfate (AS) during the coal combustion process has garnered increasing attention. This study examined the formation of ABS and AS under varying temperatures and different initial reactant ratios of SO3 and NH3 by establishing a self-constructed experimental setup. Based on the experimental data, the equilibrium constant change diagram for the ternary reactions leading to ABS and AS formation was derived. The initial temperatures for forming gaseous ABS and AS were estimated to be approximately 416.33°C and 393.56°C, respectively. Consequently, this study fills the data gap of the equilibrium constant of gaseous ABS formed at high temperatures and furnishes the selective catalytic reduction (SCR) system with quantifiable and notably expedient means of technical analysis.

燃煤烟气中 NH4HSO4 和 (NH4)2SO4 的平衡常数和初始形成温度研究
随着高硫煤的开发和利用,在煤燃烧过程中生成硫酸氢铵(ABS)和硫酸铵(AS)越来越受到关注。本研究通过自建实验装置,考察了在不同温度、不同初始反应物 SO3 和 NH3 比例下 ABS 和 AS 的生成情况。根据实验数据,得出了导致 ABS 和 AS 形成的三元反应的平衡常数变化图。据估计,形成气态 ABS 和 AS 的初始温度分别约为 416.33°C 和 393.56°C。因此,这项研究填补了在高温下形成气态 ABS 平衡常数的数据空白,并为选择性催化还原 (SCR) 系统提供了可量化的、显著便捷的技术分析手段。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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