摘要
在密封式错流旋转填料床中,利用浓度为0.926 mol/L的NaOH溶液吸收空气中体积分数为0.5%—1%的CO2气体,对气膜控制过程传质性能进行了研究。实验表明:密封式错流旋转填料床CO2的吸收率随气体流量的增大而减小,在低转速下随旋转填料床的转速增大气体吸收率上升较快,高转速时影响变小;转速大于1 000 r/min情况下,CO2的吸收率随液量的增大而上升,转速小于1 000 r/min情况下,CO2的吸收率随液量增大而变小。建立了密封式错流旋转填料床气膜控制过程的气体吸收模型,经验证实验结果与模型计算结果吻合较好。
The gas-film controlled mass transfer characteristic was investigated in sealed cross-flow rotating packed bed（RPB）, where the CO2 in the air （φ= 0.5%-1% ） was absorbed by NaOH solution [ c（NaOH） = 0. 926 mol/L]. The experimental data shows that the CO2 removal efficiency decreases with increasing of gas flux; it increases with the increase of liquid flux under the condition of rotating speed higher than 1 000 r/min ; however, it decreases with the increase of liquid flux under the condition of rotating speed less than 1 000 r/min. A mathematical model was developed for gas-film controlled mass transfer in sealed cross-flow RPB. The calculation values from mathematical model accord with the experimental values well.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2007年第12期1-4,50,共5页
Chemical Engineering(China)
基金
山西省自然基金资助项目(20051015)
关键词
旋转填料床
错流
传质
气膜控制
rotating packed bed
cross-flow
mass transfer
gas-film controlled
