化学工程2009，Vol.37Issue(7)：42-46,5.
氨在超临界水中氧化的平衡热力学研究
Equilibrium thermodynamics of ammonia oxidation in supercritical water
摘要
Abstract
The sewage sludge contains a lot of nitrogen-containing organics whose intermediate product during the supercritical water oxidation (SCW) process is ammonia. A thermodynamic model was developed to predict the performance of ammonia oxidation in supercritical water. Based on Peng-Robinson EOS formulations and direct Gibbs free energy minimization, the equilibrium composition of the reaction system for different conditions was calculated. The result shows that as the reaction system reaches equilibrium, ammonia can be completely oxidized in the supercritical water, and most of which converts to N2; NO2 and NO axe the minor by-produets and N2O is hardly produced in the system. Increasing temperature and excess oxygen can increase the equilibrium composition of NOx. But the highest selectivity of NOx is less than 2%. Comparing the calculated results with experimental results from other papers, it shows that the N2O is only an intermediate product in the supereritical water oxidation of ammonia, and the degradation of ammonia is mostly affected by dynamic factors.关键词
超临界水氧化/氨/热力学分析Key words
supereritieal water oxidation/ammonia/thermodynamic analysis分类
化学化工引用本文复制引用
陈崇明,王树众,张钦明,徐东海,公彦猛,胡昕..氨在超临界水中氧化的平衡热力学研究[J].化学工程,2009,37(7):42-46,5.基金项目
国家高技术研究发展计划项目(2006AA06Z313) （2006AA06Z313）
国家重点基础研究发展计划项目(2003CB214500) （2003CB214500）
