摘要
以硅胶为研究对象,以平衡理论为基础,建立了固定床CO2吸附的穿透曲线模型,同时分析了CO2吸附的传质动力学,并通过实验手段,在不同实验条件下的验证了模型的准确性。研究结果表明:模型的计算结果和实验结果相一致,且具有较高的准确性。升高温度能促进颗粒内传质速率,但对于流体界膜传质速率和总传质速率影响较小;增加气体流速,CO2的流体界膜的传质速率得到改善,而颗粒内传质速率不随流速的变化而变化,总传质速率得到改善;增加CO2入口浓度,颗粒内部传质速率保持不变,流体界膜的传质速率及总传质速率增加较小。
A fixed-bed breakthrough model of CO2 adsorption on silica gel was built with based on equilibrium theory, and the mass transfer kinetics of CO2 adsorption were analyzed. The adsorption experiments were carried out under different operating conditions to test the model accuracy. The results show that the breakthrough model fit well with the experimental results, and the model accuracy was good. With the increase of temperature, the mass transfer rate inside the holes （ βks） was promoted, while the effect of temperature on the mass transfer rate in fluid boundary film （kF） and the overall mass transfer （ KF） was not obvious; With the increase of gas flow rate, kF and KF was promoted, but βks was constant; With the increase of inlet CO2 concentration, βks was constant, kF and KF increased slightly.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2012年第4期107-112,共6页
Journal of North China Electric Power University：Natural Science Edition
关键词
穿透曲线模型
CO2
吸附
硅胶
传质
breakthrough model
carbon dioxide
adsorption
silica gel
mass transfer
