QQ客服 官方微博 反馈留言

	多级逆流微萃取系统开发与传质性能研究
	罗强 ; 李少伟 ; 郭绪强 ; 景山 ; LUO Qiang ; LI Shao-wei ; GUO Xu-qiang ; JING Shan
	2016-03-30 ; 2016-03-30
关键词	多级逆流 微萃取 萃取效率 单向流控制 脉冲进出料 multi-stage countercurrent micro-extraction extraction efficiency one-way flow control pulse feeding and discharging TQ028.4
其他题名	Development and Mass Transfer Performance of a Multi-stage Countercurrent Micro-extraction System
中文摘要	为开发多级逆流微萃取系统,实现稳定逆流操作,研究液-液两相在此系统中的传质规律,以及探索传质性能的最优化操作条件。以双向四缸往复泵和四个缓冲室通过单向阀与料液罐相连,构成脉冲进料出料系统,以单向阀控制两相单向流动,实现微萃取系统的逆流操作;以30%(v/v)TBP-煤油/水体系为研究对象,选择硝酸为待萃取物,以平行并列微通道为微萃取设备,进行单级微萃取实验,研究脉冲频率、脉冲体积、浓度等操作条件对传质性能的影响;在此基础上,进行四级逆流微萃取的研究,总结出最优化操作条件。结果表明,在两相脉冲冲程均为80μL,脉冲频率为0.13 Hz时,单级微萃取的萃取级效率达到最大;在四级逆流微萃取系统中,总萃取效率超过90%。; The purpose of this work is to develop a multi-stage countercurrent micro-extraction system to achieve stable operation of countercurrent flow, and investigate liquid-liquid mass transfer performance. The countercurrent flow was achieved by using a pulse feeding discharging system and a one-way control system. The pulse feeding discharging system was composed of a reciprocating pump with four pistons moving at opposite directions, and four chambers connected with the material vessels by check valves. The single-stage extraction performance was first investigated in a multi-channel micro-extraction device with 30% TBP-kerosene / water- nitric acid as the liquid-liquid extraction system. The effect of operation conditions including pulse frequency, pulse volume and concentration on the mass transfer performance was investigated, and then the extraction performance of the four-stage micro-extraction system was tested. Optimal operation conditions were finally obtained. The highest extraction efficiency of the single-stage extraction is achieved when the pulse frequency is at 0.13Hz, with the pulse stroke of both phases at 80μL. The total extraction efficiency of the four-stage micro-extraction system is higher than 90% in all experiments.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/143895]
专题	清华大学
推荐引用方式 GB/T 7714	罗强,李少伟,郭绪强,等. 多级逆流微萃取系统开发与传质性能研究[J],2016, 2016.
APA	罗强.,李少伟.,郭绪强.,景山.,LUO Qiang.,...&JING Shan.(2016).多级逆流微萃取系统开发与传质性能研究..
MLA	罗强,et al."多级逆流微萃取系统开发与传质性能研究".(2016).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。