Vapor Permeation Properties of an NaY-Type Zeolite Membrane for Normal and Branched Hexanes

2002 ◽  
Vol 41 (7) ◽  
pp. 1768-1773 ◽  
Author(s):  
Byeong-Heon Jeong ◽  
Yasuhisa Hasegawa ◽  
Ken-Ichiro Sotowa ◽  
Katsuki Kusakabe ◽  
Shigeharu Morooka
Keyword(s):  
Zeolite Membrane ◽  
Vapor Permeation ◽  
Type Zeolite ◽  
Permeation Properties

scholarly journals Gas Permeation Properties of High-Silica CHA-Type Zeolite Membrane

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 249
Author(s):  
Yasuhisa Hasegawa ◽  
Chie Abe ◽  
Mayumi Natsui ◽  
Ayumi Ikeda
Keyword(s):  
Molecular Size ◽  
Gas Permeation ◽  
Zeolite Membrane ◽  
Type Zeolite ◽  
High Silica ◽  
Separation Of Co2 ◽  
Α Al2o3 ◽  
Separation Performances ◽  
Molecular Sieving ◽  
Permeation Properties

The polycrystalline CHA-type zeolite layer with Si/Al = 18 was formed on the porous α-Al2O3 tube in this study, and the gas permeation properties were determined using single-component H2, CO2, N2, CH4, n-C4H10, and SF6 at 303–473 K. The membrane showed permeation behavior, wherein the permeance reduced with the molecular size, attributed to the effect of molecular sieving. The separation performances were also determined using the equimolar mixtures of N2–SF6, CO2–N2, and CO2–CH4. As a result, the N2/SF6 and CO2/CH4 selectivities were as high as 710 and 240, respectively. However, the CO2/N2 selectivity was only 25. These results propose that the high-silica CHA-type zeolite membrane is suitable for the separation of CO2 from CH4 by the effect of molecular sieving.

Synthesis and Permeation Properties of a DDR-Type Zeolite Membrane for Separation of CO2/CH4Gaseous Mixtures

2007 ◽  
Vol 46 (21) ◽  
pp. 6989-6997 ◽  
Author(s):  
Shuji Himeno ◽  
Toshihiro Tomita ◽  
Kenji Suzuki ◽  
Kunio Nakayama ◽  
Kenji Yajima ◽  
...  
Keyword(s):  
Zeolite Membrane ◽  
Type Zeolite ◽  
Separation Of Co2 ◽  
Permeation Properties

Fabrication And Application Of Zeolite Membranes

2002 ◽  
Vol 752 ◽  
Author(s):  
Hidetoshi Kita
Keyword(s):  
Microwave Heating ◽  
Porous Ceramic ◽  
Heating System ◽  
Zeolite Membrane ◽  
Conventional Heating ◽  
Organic Liquids ◽  
Zeolite Membranes ◽  
Tubular Type ◽  
Vapor Permeation ◽  
Type Zeolite

ABSTRACTZeolite Membranes Were Prepared On A Porous Ceramic Support By Hydrothermal Synthesis Using Conventional Heating System And Microwave Heating. Naa And T Type Zeolite Membranes Were Highly Selective For Permeating Water Preferentially With The High Permeation Flux, While Silicalite Membranes Exhibited Preferential Organic Compound Permeation From Water Such As Ethanol/Water. Nay And Nax Zeolite Membranes Showed A High Alcohol Selectivity For Several Feed Mixtures With Methanol Or Ethanol And A High Benzene Selectivity For Benzene/Cyclohexane And Benzene/N-Hexane Separation. The Performance Of The Zeolite Membranes Was The Most Favorable One For Pervaporation Membranes Which Have Been Published So Far And A Tubular Type Module Using A Type Zeolite Membrane For Dehydration Of Organic Liquids Has Been Put Into Industrial Operation. The Tubular Type Pervaporation And Vapor Permeation Module Can Produce 99.8 Wt% Ethanol From 600 L/H, 90 Wt% Ethanol Feed At 120 °C. For The Mass Production Of Zeolite Membrane A New Synthetic Method Using A Microwave Heating Is Also Proposed.

Continuous dehydration of IPA–water mixture by vapor permeation using Y type zeolite membrane in a recycling system

2015 ◽  
Vol 147 ◽  
pp. 346-352 ◽  
Author(s):  
Naotsugu Itoh ◽  
Jun Ishida ◽  
Yuhei Kikuchi ◽  
Takafumi Sato ◽  
Yasuhisa Hasegawa
Keyword(s):  
Zeolite Membrane ◽  
Water Mixture ◽  
Recycling System ◽  
Vapor Permeation ◽  
Type Zeolite

scholarly journals Analysis of ethanol dehydration using membrane separation processes

2020 ◽  
Vol 15 (1) ◽  
pp. 122-132 ◽  
Author(s):  
Carolina Conde-Mejía ◽  
Arturo Jiménez-Gutiérrez
Keyword(s):  
Capital Investment ◽  
Membrane Separation ◽  
Biomass Pretreatment ◽  
Ethanol Dehydration ◽  
Purification Step ◽  
Silica Membrane ◽  
Separation Processes ◽  
Fermentation Processes ◽  
Vapor Permeation ◽  
Type Zeolite

AbstractAfter the biomass pretreatment and fermentation processes, the purification step constitutes a major task in bioethanol production processes. The use of membranes provides an interesting choice to achieve high-purity bioethanol. Membrane separation processes are generally characterized by low energy requirements, but a high capital investment. Some major design aspects for membrane processes and their application to the ethanol dehydration problem are addressed in this work. The analysis includes pervaporation and vapor permeation methods, and considers using two types of membranes, A-type zeolite and amorphous silica membrane. The results identify the best combination of membrane separation method and type of membrane needed for bioethanol purification.

Development of Biogas Separation Process Using DDR-Type Zeolite Membrane

2010 ◽  
Vol 36 (6) ◽  
pp. 545-551 ◽  
Author(s):  
Shuji Himeno ◽  
Kiwamu Takeya ◽  
Shoichi Fujita
Keyword(s):  
Separation Process ◽  
Zeolite Membrane ◽  
Type Zeolite
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