摘要
The investigation of hydrodynamic behavior in three-phase external loop airlift reactors is important to their design and scale-up. Pressure difference was used to measure gas holdup and ultrasonic Doppler anemometry was used to measure liquid velocity. Gas holdup, liquid velocity and expansion rate increased with increasing superficial gas velocity. Under the same superficial gas velocity, gas holdup increased with increasing static solid height, and decreased with increasing solid particle diameter.Adding large particles could increase interfacial area, increase gas residual time and intensify mass transfer. Liquid circulation velocity and expansion rate decreased with increasing solid particle diameter and static solid height.Liquid velocity could be controlled in a suitable range by adding particles to improve the performance in airlift loop reactors.
The investigation of hydrodynamic behavior in three-phase external loop airlift reactors is important to their design and scale-up. Pressure difference was used to measure gas holdup and ultrasonic Doppler anemometry was used to measure liquid velocity. Gas holdup, liquid velocity and expansion rate increased with increasing superficial gas velocity. Under the same superficial gas velocity, gas holdup increased with increasing static solid height, and decreased with increasing solid particle diameter. Adding large particles could increase interfacial area, increase gas residual time and intensify mass transfer. Liquid circulation velocity and expansion rate decreased with increasing solid particle diameter and static solid height. Liquid velocity could be controlled in a suitable range by adding particles to improve the performance in airlift loop reactors.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第7期1213-1217,共5页
CIESC Journal
关键词
气升式环流反应器
气含率
循环液速
膨胀率
airlift loop reactor
gas holdup
liquid circulation velocity
expansion rate
