Kinetic modeling of urea decomposition based on systematic thermogravimetric analyses of urea and its most important by-products

被引：111

作者：

Brack, Wolfgang ^{[1
]}

Heine, Barbara ^{[1
]}

Birkhold, Felix ^{[1
]}

Kruse, Matthias ^{[1
]}

Schoch, Guenter ^{[2
]}

Tischer, Steffen ^{[2
]}

Deutschmann, Olaf ^{[2
]}

机构：

[1] Robert Bosch GmbH, D-70839 Gerlingen, Germany

[2] Karlsruhe Inst Technol, Inst Chem Technol & Polymer Chem, D-76128 Karlsruhe, Germany

来源：

CHEMICAL ENGINEERING SCIENCE | 2014年 / 106卷

关键词：

Urea; Biuret; Cyanuric acid; Thermal decomposition; SCR; Kinetic model; THERMAL-DECOMPOSITION; PYROLYSIS; HYDROLYSIS; ACID;

D O I：

10.1016/j.ces.2013.11.013

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A kinetic reaction model for thermal decomposition of urea is presented. Systematic thermogravimetric analyses of urea and its most important by-products, such as biuret and cyanuric acid, are performed to gain the main reactions and their rates. Gaseous products are analyzed and the concentrations of solid products are determined. The reaction scheme, as well as the kinetic parameterization, is validated at different heating rates. The proposed kinetic reaction model matches all performed thermogravimetric analyses and it is also able to reproduce changes in the measurement conditions, such as differences in crucibles geometry or variations of the initial sample mass. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1 / 8

页数：8

共 25 条

[1] Hydrolysis and thermolysis of urea and its decomposition byproducts biuret, cyanuric acid and melamine over anatase TiO2 [J].