Preparation of Al-Containing ZSM-58 Zeolite Membranes Using Rapid Thermal Processing for CO2/CH4 Mixture Separation

The synthesis of DDR-type zeolite membranes faces the problem of cracks that occur on the zeolite membrane due to differences in the thermal expansion coefficient between zeolite and the porous substrate during the detemplating process. In this study, Al-containing ZSM-58 zeolite membranes with DDR topology were prepared by rapid thermal processing (RTP), with the aim of developing a reproducible method for preparing DDR zeolite membrane without cracks. Moreover, we verified the influence of RTP before performing conventional thermal calcination (CTC) on ZSM-58 membranes with various silica-to-aluminum (Si/Al) molar ratios. Using the developed method, an Al-containing ZSM-58 membrane without cracks was obtained, along with complete template removal by RTP, and it had higher CO2/CH4 selectivity. An all-silica ZSM-58 membrane without cracks was obtained by only using the ozone detemplating method. ZSM-58 crystals and membranes with various Si/Al molar ratios were analyzed by using Fourier-transform infrared (FTIR) spectroscopy to confirm the effects of RTP treatment. Al-containing ZSM-58 zeolites had higher silanol concentrations than all-silica zeolites, confirming many silanol condensations by RTP. The condensation of silanol forms results in the formation of siloxane bonds and stronger resistance to thermal stress; therefore, RTP caused crack suppression in Al-containing ZSM-58 membranes. The results demonstrate that Al-containing ZSM-58 zeolite membranes with high CO2 permeance and CO2/CH4 selectivity and minimal cracking can be produced by using RTP.

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Optimized rapid thermal processing for the template removal of SAPO-34 zeolite membranes

Journal of Membrane Science ◽

10.1016/j.memsci.2018.01.066 ◽

2018 ◽

Vol 552 ◽

pp. 13-21 ◽

Cited By ~ 24

Author(s):

Na Chang ◽

Hongbo Tang ◽

Lu Bai ◽

Yanfeng Zhang ◽

Gaofeng Zeng

Keyword(s):

Thermal Processing ◽

Rapid Thermal Processing ◽

Zeolite Membranes ◽

Template Removal

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Gas permeation properties of A-type zeolite membrane formed on porous substrate by hydrothermal synthesis

Journal of Membrane Science ◽

10.1016/s0376-7388(97)00300-1 ◽

1998 ◽

Vol 141 (2) ◽

pp. 197-205 ◽

Cited By ~ 135

Author(s):

Kanna Aoki ◽

Katsuki Kusakabe ◽

Shigeharu Morooka

Keyword(s):

Hydrothermal Synthesis ◽

Gas Permeation ◽

Zeolite Membrane ◽

Porous Substrate ◽

Type Zeolite ◽

Permeation Properties

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Grain Boundary Defect Elimination in a Zeolite Membrane by Rapid Thermal Processing

Science ◽

10.1126/science.1176095 ◽

2009 ◽

Vol 325 (5940) ◽

pp. 590-593 ◽

Cited By ~ 204

Author(s):

Jungkyu Choi ◽

Hae-Kwon Jeong ◽

Mark A. Snyder ◽

Jared A. Stoeger ◽

Richard I. Masel ◽

...

Keyword(s):

Grain Boundary ◽

Thermal Processing ◽

Molecular Sieve ◽

Rapid Thermal Processing ◽

Zeolite Membrane ◽

Separation Performance ◽

Transport Pathways ◽

Scalable Production ◽

Defect Elimination ◽

High Separation

Microporous molecular sieve catalysts and adsorbents discriminate molecules on the basis of size and shape. Interest in molecular sieve films stems from their potential for energy-efficient membrane separations. However, grain boundary defects, formed in response to stresses induced by heat treatment, compromise their selectivity by creating nonselective transport pathways for permeating molecules. We show that rapid thermal processing can improve the separation performance of thick columnar films of a certain zeolite (silicalite-1) by eliminating grain boundary defects, possibly by strengthening grain bonding at the grain boundaries. This methodology enables the preparation of silicalite-1 membranes with high separation performance for aromatic and linear versus branched hydrocarbon isomers and holds promise for realizing high-throughput and scalable production of these zeolite membranes with improved energy efficiency.

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Fabrication And Application Of Zeolite Membranes

MRS Proceedings ◽

10.1557/proc-752-aa11.1 ◽

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.

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Influence of Organic Solvent Species on Dehydration Behaviors of NaA-Type Zeolite Membrane

Membranes ◽

10.3390/membranes11050347 ◽

2021 ◽

Vol 11 (5) ◽

pp. 347

Author(s):

Yasuhisa Hasegawa ◽

Wakako Matsuura ◽

Chie Abe ◽

Ayumi Ikeda

Keyword(s):

Ethanol Solution ◽

Zeolite Membrane ◽

Effect Of Temperature ◽

Dimethyl Formamide ◽

Permeation Flux ◽

Vapor Pressures ◽

Zeolite Membranes ◽

Separation Factors ◽

Type Zeolite

In this study, an NaA-type zeolite membrane was prepared, and the dehydration performances of the membrane were determined by the pervaporation for several organic solvents to understand the lower dehydration performances of zeolite membranes for NMP solutions than those for alcohols. For a 90 wt% ethanol solution at 348 K, the permeation flux and separation factor of the membrane were 3.82 kg m−2 h−1 and 73,800, respectively. The high dehydration performances were also obtained for alcohols and low boiling solvents (acetonitrile, acetone, methyl ethyl ketone (MEK) and tetrahydrofuran (THF)). However, the permeation flux and separation factors decreased significantly for high boiling solvents, such as N,N-dimethylacetamide (DMA), N,N-dimethyl formamide (DMF), dimethyl sulfoxide (DMSO) and N-methyl-2-pyrrolidone (NMP). The influences of the water content and temperature on the dehydration performances for the NMP solutions were determined to understand the lower dehydration performances for those solvents. Those results suggest that the lower dehydration performances for the high boiling solvents were attributed to the lower vapor pressures of water and the higher permeances of those solvents. Furthermore, this study proposes that the permeation behaviors through zeolite membranes could be understood by the determination of the effect of temperature on the permeance of individual components.

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Development of Methanol Permselective FAU-Type Zeolite Membranes and Their Permeation and Separation Performances

Membranes ◽

10.3390/membranes11080627 ◽

2021 ◽

Vol 11 (8) ◽

pp. 627

Author(s):

Ayumi Ikeda ◽

Chie Abe ◽

Wakako Matsuura ◽

Yasuhisa Hasegawa

Keyword(s):

Separation Factor ◽

Carbon Number ◽

Zeolite Membrane ◽

Separation Performance ◽

Solvent Mixtures ◽

Permeation Flux ◽

Aqueous Mixtures ◽

Chemical Production ◽

Zeolite Membranes ◽

Type Zeolite

The separation of non-aqueous mixtures is important for chemical production, and zeolite membranes have great potential for energy-efficient separation. In this study, the influence of the framework structure and composition of zeolites on the permeation and separation performance of methanol through zeolite membranes were investigated to develop a methanol permselective zeolite membrane. As a result, the FAU-type zeolite membrane prepared using a solution with a composition of 10 SiO2:1 Al2O3:17 Na2O:1000 H2O showed the highest permeation flux of 86,600 μmol m−2 s−1 and a separation factor of 6020 for a 10 wt% methanol/methyl hexanoate mixture at 353 K. The membrane showed a molecular sieving effect, reducing the single permeation flux of alcohol with molecular size for single-component alcohols. Moreover, the permeation flux of methanol and the separation factor increased with an increase in the carbon number of the alcohols and methyl esters containing 10 wt% methanol. In this study, the permeation behavior of FAU-type zeolite membranes was also discussed based on permeation data. These results suggest that the FAU-type zeolite membrane has the potential to separate organic solvent mixtures, such as solvent recycling and membrane reactors.

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On the performance of c-oriented MFI zeolite Membranes treated by rapid thermal processing

Journal of Membrane Science ◽

10.1016/j.memsci.2013.02.028 ◽

2013 ◽

Vol 436 ◽

pp. 79-89 ◽

Cited By ~ 32

Author(s):

Taehee Lee ◽

Jungkyu Choi ◽

Michael Tsapatsis

Keyword(s):

Thermal Processing ◽

Rapid Thermal Processing ◽

Mfi Zeolite ◽

Zeolite Membranes

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Synthesis and Performance of Deca- Dodecasil 3 Rhombohedral (DDR)-Type Zeolite Membrane In CO2 Separation– A Review

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.49708 ◽

2015 ◽

Vol 14 (2) ◽

pp. 48 ◽

Cited By ~ 8

Author(s):

Muhammad Mubashir ◽

Yeong Yin Fong ◽

Lau Kok Keong ◽

Mohd. Azmi Bin Sharrif

Keyword(s):

Secondary Growth ◽

High Energy ◽

Zeolite Membrane ◽

Co2 Separation ◽

Inorganic Membranes ◽

Zeolite Membranes ◽

Type Zeolite ◽

And Performance ◽

Cryogenic Distillation ◽

Growth Methods

CO2 capture technologies including absorption, adsorption, and cryogenic distillation are reported. Conventional technologies for CO2 separation from natural gas have several disadvantages including high cost, high maintenance, occupy more space and consume high energy. Thus, membrane technology is introduced to separate CO2 due to their several advantages over conventional separation techniques. Inorganic membranes exhibit high thermal stability, chemical stability, permeability and selectivity for CO2 and CH4 separation as compared to other type of membranes. Zeolite membranes are potential for CO2 separation due to their characteristics such as, well define the pore structure and molecular sieving property. Among the zeolite membranes, DDR membranes exhibit highest selectivity for CO2 and CH4 separation. DDR membranes are synthesized by conventional hydrothermal and secondary growth methods. These methods required very long synthesis duration (25 days) due to extremely low nucleation and crystal growth rate of DDR zeolite. In this review, synthesis and performance of DDR membrane in CO2 separation from CH4 reported by various researchers are discussed. Challenges and upcoming guidelines related to the synthesis DDR membrane and performance of DDR membrane also included.

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