化工学报2025，Vol.76Issue(2)：718-730,13.DOI:10.11949/0438-1157.20240870
合成氨反应器尾气变压吸附氨分离工艺的模拟与分析
Simulation and analysis of ammonia separation process by pressure swing adsorption from synthetic ammonia reactor-off gas
摘要
Abstract
Ammonia separation and recovery are widely used in industry,but traditional ammonia separation methods are often accompanied by high energy consumption.Pressure swing adsorption(PSA)technology,as a gas separation method with low energy consumption,simple equipment and flexible operation,has been widely used in the field of gas separation.At present,there is a lack of extensive analysis and research on the ammonia separation process of pressure swing adsorption.Based on this,this paper takes the simplified synthetic ammonia reactor-off gas as the research object,and uses a high silica-aluminium ratio molecular sieve HS-1 made in the laboratory as the adsorbent,and determines the adsorption data of three gases,NH3,N2 and H2,on this adsorbent,which provides the relevant parameters for the simulation.A two-bed vacuum pressure swing adsorption(VPSA)process was proposed,the numerical simulation method was used to study the pressure swing adsorption process for ammonia separation of the ammonia synthesis reactor tail gas.In addition,the performance of process separation under different operating conditions is studied to investigate the effect of operating parameters on process performance.The simulation results show that under the conditions of adsorption pressure of 5 bar(1 bar=105 Pa),adsorption time of 250 s,and feed amount of 1.2 mol·min-1,the purity of NH3 separated by this process can reach 89.30%,the recovery rate can reach 94.67%,and the separation energy consumption is 38.02 kJ·mol-1.关键词
合成氨/氨分离/真空变压吸附/吸附剂/数值模拟Key words
synthetic ammonia/ammonia separation/vacuum pressure swing adsorption/adsorbents/numerical simulation分类
化学工程引用本文复制引用
贾晶宇,孔德齐,沈圆辉,张东辉,李文彬,唐忠利..合成氨反应器尾气变压吸附氨分离工艺的模拟与分析[J].化工学报,2025,76(2):718-730,13.基金项目
国家自然科学基金项目(22478282) （22478282）
