Trajectory of fine particles removal with diffusiophoresis and thermophoresis in a gas-liquid cross-flow array

doi:10.1039/c9ra04436a

	Trajectory of fine particles removal with diffusiophoresis and thermophoresis in a gas-liquid cross-flow array
	Zheng, Zhijian 3; Chen, Zhong2 ; Xiong, Guoxuan 3; Zhu, Jiahua 1
刊名	RSC ADVANCES
	2019-08-27
卷号	9 期号:46 页码:26748-26756
DOI	10.1039/c9ra04436a
通讯作者	Zheng, Zhijian(zhengzhijian0423@163.com)
英文摘要	A gas-liquid cross-flow array (GLCA) system is proposed for fine particles (diameter between 0.1 mu m and 2.5 mu m, simplified as PM2.5) removal in exhaust gas, where the continuous and smooth wastewater films, providing huge specific surface area, each act as independent traps to remove PM2.5. The removal efficiency of PM2.5 is important for evaluating the performance of a GLCA, and the trajectory across the films determines the migration and ultimate fate of PM2.5. An analytical model based on a single film is developed to analyze the critical removal trajectory with diffusiophoresis (DP) and thermophoresis (TP) in the thermal boundary layer to calculate the efficiency, where the role of each force is examined. And experiments with a lab-scale GLCA are carried out with different vapor concentration and temperature gradients to verify the model. They both reveal that the removal efficiency can be increase sharply by increasing the humidity gradient between the bulk gas and film surface, while it increases slowly as temperature gradient increasing. Thus DP and TP have important effects on PM2.5 removal in the GLCA, and DP has a much more important effect than TP. A GLCA with appropriate humidity and temperature gradient can remove PM2.5 in a costly and efficient manner.
资助项目	Natural Science Foundation of China[21276161]
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000483739800027
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9596]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Zheng, Zhijian
作者单位	1.Sichuan Univ, Sch Chem Engn, Chengdu 610065, Sichuan, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.East China Univ Technol, State Key Lab Breeding Base Nucl Resources & Envi, Nanchang 330013, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Zhijian,Chen, Zhong,Xiong, Guoxuan,et al. Trajectory of fine particles removal with diffusiophoresis and thermophoresis in a gas-liquid cross-flow array[J]. RSC ADVANCES,2019,9(46):26748-26756.
APA	Zheng, Zhijian,Chen, Zhong,Xiong, Guoxuan,&Zhu, Jiahua.(2019).Trajectory of fine particles removal with diffusiophoresis and thermophoresis in a gas-liquid cross-flow array.RSC ADVANCES,9(46),26748-26756.
MLA	Zheng, Zhijian,et al."Trajectory of fine particles removal with diffusiophoresis and thermophoresis in a gas-liquid cross-flow array".RSC ADVANCES 9.46(2019):26748-26756.