超重力CO2吸收过程的Aspen模拟计算

Simulation and calculation of CO2 absorption under high gravity environment by Aspen Plus software

关键词:  超重力  CO₂脱除  Aspen Plus  模拟计算 

Key words:  high gravity  CO₂ removal  Aspen Plus  simulation calculation

摘要:

目的 模拟超重力CO₂的吸收过程,从而为实验工艺参数的优化提供指导。方法 建立了超重力NaOH碱液吸收CO₂的Aspen计算模型,考查了多个影响因素对CO₂脱除率的影响。结果 通过对比可知,将超重力反应器等价转化为常规填料塔后,NaOH质量分数、碱液进料量和压力对CO₂脱除率的影响与超重力实验室的变化规律一致,但模拟值仅为实验值的1/2左右。对传质参数进行进一步修正,修正后的模拟计算结果与实验值接近,平均偏差仅为0.77%。结论 建立的超重力CO₂吸收模型准确可靠,可为后续实验提供一定的方向性指导。

Abstract:

Objective The CO₂ absorption process under high gravity environment is simulated so as to provide guidance for the optimization of experimental process parameters. Methods An Aspen Plus calculation model for CO₂ absorption using NaOH alkaline solution under high gravity was established, and the influence factors on the CO₂ removal rate were investigated. Results While the high gravity reactor was equivalent to a conventional packed tower through the equivalent conversion method, the influence of sodium hydroxide mass fraction, solution feed rate and pressure on the CO₂ removal rate were similar to that of the high gravity laboratory value, but the simulated value was only about 1/2 of the experimental value. The corrected simulation results were close to the experimental values, and the average deviation was only 0.77%. Conclusion sThe established CO₂ absorption model under high gravity environment is accurate and reliable, which can provide some directional guidance for subsequent experiments.