Organic Vapor Permeability of High Barrier Polymer Membranes by a Dynamic Purge and Trap/thermal Desorption Procedure PDF Download
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Author: Yueh-Yi Chang
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 204
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Book Description
Author: Yueh-Yi Chang
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 204
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Book Description
Author: AL. Baner
Publisher:
ISBN:
Category : Aroma barrier
Languages : en
Pages : 14
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Book Description
Two test methods have been developed which provide quantitative and reliable values for the rate of diffusion of organic vapors through polymer membranes. Method I is based on a quasi-isostatic procedure and utilizes gas chromatography analysis for quantifying the amount of organic vapor that has permeated through the membrane. The permeability of a number of permeant/polymer membrane combinations was determined by this method, with studies being carried out at constant temperature and with varying permeant concentrations. The effect of permeant concentration on the permeability rate, P, permeability constant, ̄P, the apparent diffusion coefficient, Da, and the limiting diffusion coefficient, D0, was determined for the diffusion of toluene vapor through oriented polypropylene, Saran, and a Saran-coated oriented polypropylene structure.
Author: Jonathan Bernard Shaw
Publisher:
ISBN:
Category : Mass transfer
Languages : en
Pages : 236
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Book Description
Author: Li Xiong
Publisher:
ISBN:
Category : Chemical detectors
Languages : en
Pages : 620
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Book Description
Author: Roney Oren Laine
Publisher:
ISBN:
Category : Permeability
Languages : en
Pages : 188
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Book Description
Author: Chen-Pang Anthony Liu
Publisher:
ISBN:
Category :
Languages : en
Pages : 227
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Book Description
Author: A Basile
Publisher: Woodhead Publishing
ISBN: 9781782422464
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
Vapour permeation and membrane distillation are two emerging membrane technologies for the production of vapour as permeate, which, in addition to well-established pervaporation technology, are of increasing interest to academia and industry. As efficient separation and concentration processes, they have high potential for use in the energy, water, chemical, food and pharmaceutical sectors. Part One begins by covering the fundamentals, preparation and characterization of pervaporation, before going on to outline the associated systems and applications. State of the art uses, future trends and next generation pervaporation are then discussed. Part Two then explores the preparation, characterization, systems and applications of membranes for vapour permeation, followed by modelling and the new generation of vapour permeation membranes. Finally, Part Three outlines the fundamentals of membrane distillation and its applications in integrated systems, before the book concludes with a view of the next generation.
Author: Xianshe Feng
Publisher:
ISBN:
Category : Gases
Languages : en
Pages :
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Book Description
Author: Stacye Regina Thrasher
Publisher:
ISBN:
Category : Separation (Technology)
Languages : en
Pages : 318
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
A process for restoring the selectivity of high-flee-volume, glassy polymer membranes for condensable components over less-condensable components or non-condensable components of a gas mixture. The process involves exposing the membrane to suitable sorbent vapor, such as propane or butane, thereby reopening the microvoids that make up the free volume. The selectivity of an aged membrane may be restored to 70-100% of its original value. The selectivity of a membrane which is known to age over time can also be maintained by keeping the membrane in a vapor environment when it is not in use.
