摘要
采用一种改进型的多组分等温线模型,运用Aspen Adsorption软件模拟空分过程中吸附塔内13X分子筛吸附空气中微量水蒸气和二氧化碳的过程。考察了操作压力、温度变化对穿透时间的影响以及水蒸气、二氧化碳在床层中的负载分布。研究结果表明:当压力从120 kPa增大到350 kPa,H2O和CO2的穿透时间分别增加32%和116%;在10～30℃,随着温度的升高,穿透时间点逐渐前移,但变化幅度较小;在CO2和H2O的竞争吸附中,CO2吸附能力明显弱于H2O,其饱和吸附量仅为H2O饱和吸附量的0.34%。
The modified adsorption isotherm model and Aspen Adsorption software were used to simulate for air-prepurification in zeolite 13X bed where CO2 and H2O were adsorbed and the effects of operation pressure and temperature on breakthrough time were studied.Moreover,the variations of the concentrations of CO2 and H2O with adsorption time and the distributions of CO2、H2O adsorption quantity in the Z direction were obtained.The results showed that the breakthrough time of CO2 and H2O increase 32% and 116% respectively with the pressure increase from 120 kPa to 350 kPa but the effect of temperature on the breakthrough curve is very small within the range of 10~30 ℃.In the competitive adsorption of CO2 and H2O,the saturated adsorption quantity of CO2 is significantly less than that of H2O and only makes up 0.34 percent of H2O′s saturated adsorption quantity.
出处
《低温与特气》
CAS
2013年第3期19-24,共6页
Low Temperature and Specialty Gases
