Membrane Performance of High-Silica CHA-Type Zeolite Membranes in Vapor Permeation for Dehydration of Hydrous 2-Propanol

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.

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Development of practically available up-scaled high-silica CHA-type zeolite membranes for industrial purpose in dehydration of N-methyl pyrrolidone solution

Journal of Membrane Science ◽

10.1016/j.memsci.2012.03.032 ◽

2012 ◽

Vol 409-410 ◽

pp. 82-95 ◽

Cited By ~ 42

Author(s):

Kiminori Sato ◽

Kazunori Sugimoto ◽

Naoto Shimotsuma ◽

Tomohisa Kikuchi ◽

Tomohiro Kyotani ◽

...

Keyword(s):

Zeolite Membranes ◽

Type Zeolite ◽

High Silica ◽

Methyl Pyrrolidone

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

Membranes ◽

10.3390/membranes11040249 ◽

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.

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Diffusion of phenolic compounds within high-silica MFI-type zeolite in the mesitylene solution

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2021.111044 ◽

2021 ◽

Vol 319 ◽

pp. 111044

Author(s):

Xinluona Su ◽

Yuta Nakasaka ◽

Ren Moriwaki ◽

Takuya Yoshikawa ◽

Takao Masuda

Keyword(s):

Phenolic Compounds ◽

Type Zeolite ◽

High Silica

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Influence of the hydrothermal synthetic parameters on the pervaporative separation performances of CHA-type zeolite membranes

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2011.03.006 ◽

2011 ◽

Vol 143 (2-3) ◽

pp. 270-276 ◽

Cited By ~ 28

Author(s):

Xiansen Li ◽

Hidetoshi Kita ◽

Hua Zhu ◽

Zhenjia Zhang ◽

Kazuhiro Tanaka ◽

...

Keyword(s):

Zeolite Membranes ◽

Type Zeolite ◽

Separation Performances

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The removal of nitrogen monoxide from polluted air using CHA- and DDR-type zeolite membranes: insights from molecular simulations

Materials Today Communications ◽

10.1016/j.mtcomm.2021.102651 ◽

2021 ◽

pp. 102651

Author(s):

Amir Hasanzadeh ◽

Siamak Pakdel ◽

Jafar Azamat ◽

Hamid Erfan-Niya ◽

Alireza Khataee

Keyword(s):

Molecular Simulations ◽

Nitrogen Monoxide ◽

Zeolite Membranes ◽

Type Zeolite

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Analysis of ethanol dehydration using membrane separation processes

Open Life Sciences ◽

10.1515/biol-2020-0013 ◽

2020 ◽

Vol 15 (1) ◽

pp. 122-132 ◽

Cited By ~ 2

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.

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