A scheme for solving strongly coupled chemical reaction equations appearing in the removal of SO2 and NOx from flue gases

被引：5

作者：

Zhang, Jianhong ^{[1
]}

Sun, Jizhong ^{[1
]}

Gong, Ye ^{[1
]}

Wang, Dezhen ^{[1
]}

Ma, Tengcai ^{[1
]}

Liu, Yue ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Mat Modificat Laser Ion & Electron, Dalian 116024, Peoples R China

来源：

VACUUM | 2008年 / 83卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Removal of SO2 and NOx; Chemical reaction dynamics; Treanor's method; Numerical simulation;

D O I：

10.1016/j.vacuum.2008.03.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The removal of NOx from mixtures of NO-NO2-N-2 and NO-NO2-O-2-H2O is discussed theoretically in this study, and the removal of SO2 and NOx is further discussed when a gas system of NOx-N-2-O-2-H2O contains CO2 and SO2. The involved chemical reaction rate equations in the process of SO2/NOx removal are solved numerically using Treanor's method, in which a scheme separating chemical reactions into fast and slow groups has been proposed for improving the numerical stability. Numerical results show that the contribution of ion reactions to NOx removal is negligible, and that high temperature is not beneficial for the NO oxidation. However, high concentration Of 02 is conducive to the NO oxidation. Addition of water facilitates the NOx removal, and increasing water vapor concentration enhances the NOx removal efficiency; inclusion of CO2 and SO2 into the system favors the NO removal. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：133 / 137

页数：5

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