共查询到19条相似文献,搜索用时 125 毫秒
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中空纤维膜萃取的传质特性及其过程强化 总被引:2,自引:0,他引:2
膜萃取是膜过程和液液萃取过程相结合的一种新型分离技术.与通常的液液萃取过程不同,膜萃取传质中没有相的分散过程,具有其特殊的优势.文中详细介绍了中空纤维膜萃取的传质特性及其过程强化的研究进展. 相似文献
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乙醇连续发酵与膜分离耦合过程研究进展 总被引:5,自引:0,他引:5
在简述乙醇连续发酵与膜分离耦合过程的发展历史和技术实施基础上,着重介绍了膜超滤与乙醇连续发酵的耦合过程,并从膜过程、微生物种类及工艺流程和动力学方面进行了分析。 相似文献
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膜萃取过程的传质特性研究 总被引:3,自引:0,他引:3
本文以100%磷酸三丁酯(TBP)——对硝基苯酚——水为实验体系,在中空纤维膜器中研究了膜草取过程的传质特性。研究结果表明,TBP 萃取对硝基苯酚的膜过程基本上不存在膜阻,其速度控制步骤在于水相的传质。如果选用对溶质更易溶解的一相浸润的材料制备中空纤维,膜萃取过程的膜阻将会减至最小,从而可获得最大的膜萃取总传质系数。 相似文献
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过程强化是化学工程与技术领域的研究热点之一,化学工程研究的新进展大大推动了过程强化技术的进步.介绍了“场”“流”分析的基本概念,并以此为出发点,讨论了过程耦合技术,以及化学作用、外场介入对分离过程的强化. 相似文献
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A multicomponent membrane based on polysulfone nanofibers and titanium dioxide nanoparticles is produced by the coupling of electrospinning and electrospraying techniques. The manufactured product can satisfy a number of conflicting requirements begetting its technical and functional versatility as well as the reliability of the process. As nanoparticle dispersion is a critical issue in nanoparticle technology, their distribution and morphology have been extensively studied before and after electrospraying, and process optimization has been carried out to obtain nanoparticles uniformly spread over electrospun nanofibers. These membranes have been proved to be a good candidate for supported catalysis due to the photocatalytic activity of TiO(2), tested for degradation of CEPS, a mustard agent simulant. At the same time, an effective improvement in filtering properties in terms of pressure drop has also been studied. 相似文献
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膜分离法空气净化的应用与研究进展 总被引:1,自引:0,他引:1
气体膜分离技术已经成为空气净化的重要技术之一。文章全面综述了近年来的膜法空气净化技术的应用及研究进展,介绍了用于空气净化的分离膜及膜分离工艺,展望了膜法空气净化技术的发展趋势。指出,由于膜分离空气净化工艺具有连续操作、低能耗和高效等优点,有望替代或部分替代传统空气的颗粒物分离、脱湿及脱二氧化碳过程。 相似文献
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离子膜法氯碱工艺具有产品质量高、工艺简单、能耗低、环境友好等优点,目前已逐渐替代传统工艺。本文介绍了目前中国离子膜法氯碱生产技术的发展概况并展望了中国对该工艺的技术创新。 相似文献
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根据膜分离技术的基本原理和各种膜的性能特征,从膜法澄清、浓缩、分离、除菌四方面综述了膜技术在茶叶资源深加工中的研究与应用,并展望了茶叶资源膜法深加工的发展前景与高效膜工艺. 相似文献
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膜法医药用水生产技术的回顾与展望 总被引:4,自引:1,他引:3
回顾了膜法医药用水生产技术的国外进展,在分析了膜分离技术的优势,医药用水水质要求和存在的问题,以及膜与膜过程的最新发展的基础上,讨论了该技术的应用前景。 相似文献
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A great challenge is the coupling of very sensitive microelectronic devices to wet biological systems in the generation of biomimetic sensors. Lipid membranes on solid supports (electrodes or semiconductors) may become the matrix of future bioelectronic devices probing and controlling biomolecular processes for scientific and technical applications. A sufficient electrical isolation between the coupling region and the surrounding electrolyte is mandatory. An attached lipid membrane with integral natural or designed proteins may be the material of choice if the biological components are kept in a proper environment. To retain the fluidity and stability of the lipid membrane and to provide an ion reservoir and space for bulky integral proteins, a separating layer composed of crystalline arrays of monomolecular proteinaceous subunits, termed S-layer, can be self-assembled on metal or semiconductor surfaces. In this way S-layer-supported lipid membranes are biomimetic structures mimicking the supramolecular principle of archeal cell envelopes. These composite architectures may ascend toward exciting new key devices, particularly in fields of membrane protein-based biosensors or lab-on-a-chip technology. 相似文献