利用Fluent软件对N2O催化分解反应器数值模拟

Numerical simulation of N 2 O catalytic cracking reactor using Fluent software

为了设计N2O催化分解反应器,运用Fluent软件对整体式分子筛催化剂进行数值模拟,考察孔密度和操作条件对整体式分子筛催化剂转化率的影响。结果表明,在相同温度下,N2O的转化率随着催化剂孔密度的减小而降低。在反应器轴向距离120 mm处,气体反应最快;提高入口温度、浓度或降低空速,均有利于在较短的轴向距离内达到较高的N2O转化率。在固定床反应器中,比较棒状催化剂和整体式催化剂中床层温度、反应转化率及轴向压降的变化规律,为整体式分子筛催化剂工业化设计提供理论基础。

In order to carry out the design of N 2 O catalytic decomposition reactor,we use Fluent software to simulate the monolithic zeolite catalyst,and the effects of pore density and operating conditions on the conversion of monolithic zeolite catalyst were investigated.The results showed that at the same temperature,the conversion of N 2 O decreased with the decrease of pore density.When the axial distance of the reactor is 120 mm,the gas reaction rate is the fastest;increasing the inlet temperature,concentration or reducing the space velocity are conducive to achieving a higher N 2 O conversion rate in a shorter axial distance.In addition,the variation of bed temperature,reaction conversion and axial pressure drop in a fixed bed reactor was compared with that of a rod catalyst,which provided a theoretical basis for the industrial design of monolithic zeolite catalysts.