摘要
采用气体动态吸收法,对高温高压下浆态鼓泡床中气液传质系数进行了测定,考察了系统压力、温度、表观气速及固含量等操作条件对传质系数的影响.结果表明,在温度298～473 K、气体压力1.0～3.0 MPa、表观气速0.03～0.10 m/s、固含量0%～20%(ω)的实验条件下,体积传质系数随着压力、温度及表观气速的增加而增大,随固含量的增加而减小.同时对不同塔径的传质系数进行了比较,表明在相同的操作条件下,大塔的传质系数略高于小塔.
The dynamic method was used to measure the gas-liquid mass transfer coefficient under high temperature and high pressure in a slurry bubble column reactor. The influences of the main operation conditions on mass transfer such as temperature, pressure, superficial gas velocity and solid concentration, were studied systematically. It has been found that under the conditions of temperature 293~473 K, pressure 1.0~3.0 MPa, gas velocity 0.03~0.10 m/s and solid concentration 0%~20%(w), the gas-liquid mass transfer coefficient increases with increasing pressure, temperature, and superficial gas velocity, but decreases with the increase of solid concentration. Moreover, the discrepancy of kLa in two different slurry reactors was compared. The result shows that the kLa values in a bigger reactor are a little larger than those in a smaller one at the same superficial gas velocity.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2004年第4期289-294,共6页
The Chinese Journal of Process Engineering
基金
中国石化股份有限公司科技开发项目(编号:201003)
关键词
传质系数
浆态鼓泡床
气液传质
反应器
mass transfer coefficient
slurry bubble column reactor
gas-liquid mass transfer
reactor
