Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio

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	Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio
	Zhang Weipeng; Yong Yumei; Zhang Guangji; Yang Chao; Mao Zaisha
刊名	CHINESE JOURNAL OF CHEMICAL ENGINEERING
	2014-06-01
卷号	22 期号:6 页码:611-621
关键词	airlift loop reactor macro-mixing micro-mixing bubble behavior hydrodynamics
ISSN号	1004-9541
其他题名	Chin. J. Chem. Eng.
中文摘要	The present study summarizes the results of macro-and micro-mixing characteristics in an airlift internal loop reactor with low aspect ratio (H/D <= 5) using the electrolytic tracer response technique and the method of parallel competing reactions respectively. The micro-mixing has never been investigated in airlift loop reactors. The dual-tip electrical conductivity probe technique is used for measurement of local bubble behavior in the reactor. The effects of several operating parameters and geometric variables are investigated. It is found that the increase in superficial gas velocity corresponds to the increase in energy input, liquid circulation velocity and shear rate, decreasing the macro-mixing time and segregation index. Moreover, it is shown that top clearance and draft diameter affect flow resistance. However, the bubble redistribution with a screen mesh on the perforated plate distributor for macro-mixing is insignificant. The top region with a high energy dissipation rate is a suitable location for feeding reactants. The analysis of present experimental data provides a valuable insight into the interaction between gas and liquid phases for mixing and improves the understanding of intrinsic roles of hydrodynamics upon the reactor design and operating parameter selection.
英文摘要	The present study summarizes the results of macro-and micro-mixing characteristics in an airlift internal loop reactor with low aspect ratio (H/D <= 5) using the electrolytic tracer response technique and the method of parallel competing reactions respectively. The micro-mixing has never been investigated in airlift loop reactors. The dual-tip electrical conductivity probe technique is used for measurement of local bubble behavior in the reactor. The effects of several operating parameters and geometric variables are investigated. It is found that the increase in superficial gas velocity corresponds to the increase in energy input, liquid circulation velocity and shear rate, decreasing the macro-mixing time and segregation index. Moreover, it is shown that top clearance and draft diameter affect flow resistance. However, the bubble redistribution with a screen mesh on the perforated plate distributor for macro-mixing is insignificant. The top region with a high energy dissipation rate is a suitable location for feeding reactants. The analysis of present experimental data provides a valuable insight into the interaction between gas and liquid phases for mixing and improves the understanding of intrinsic roles of hydrodynamics upon the reactor design and operating parameter selection.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	GAS-LIQUID SEPARATOR ; MICROMIXING EFFICIENCY ; DRAFT-TUBE ; CHEMICAL-REACTION ; HYDRODYNAMICS ; SEGREGATION ; BIOREACTOR ; SIMULATION ; PHASE ; PERFORMANCE
收录类别	SCI
原文出处	://WOS:000335311100001
语种	英语
WOS记录号	WOS:000335311100001
公开日期	2014-08-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/11038]
专题	过程工程研究所_研究所（批量导入）
作者单位	Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang Weipeng,Yong Yumei,Zhang Guangji,et al. Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2014,22(6):611-621.
APA	Zhang Weipeng,Yong Yumei,Zhang Guangji,Yang Chao,&Mao Zaisha.(2014).Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio.CHINESE JOURNAL OF CHEMICAL ENGINEERING,22(6),611-621.
MLA	Zhang Weipeng,et al."Mixing Characteristics and Bubble Behavior in an Airlift Internal Loop Reactor with Low Aspect Ratio".CHINESE JOURNAL OF CHEMICAL ENGINEERING 22.6(2014):611-621.