2021
DOI: 10.3390/membranes11040249
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Gas Permeation Properties of High-Silica CHA-Type Zeolite Membrane

Abstract: 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 … Show more

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Cited by 25 publications
(10 citation statements)
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“…The effect of temperature on the gas permeation properties of several kinds of zeolite membranes was reported [ 22 , 23 , 24 , 25 ]. The permeance of adsorbed gases increased with temperature, reached the maximum, and decreased at higher temperatures.…”
Section: Resultsmentioning
confidence: 99%
“…The effect of temperature on the gas permeation properties of several kinds of zeolite membranes was reported [ 22 , 23 , 24 , 25 ]. The permeance of adsorbed gases increased with temperature, reached the maximum, and decreased at higher temperatures.…”
Section: Resultsmentioning
confidence: 99%
“…The SAPO-34 unit cell has chabazite (CHA)-type topology related to other aluminophosphates (such as SAPO-15, SAPO-11, SAPO-16, and SAPO-31), aluminosilicate (low-silica CHA and high-silica SSZ-13) and pure silicate (all-silica CHA). All these low and high-silica zeolite materials have been explored for gas separation applications [ 32 , 33 , 34 , 35 , 36 ].…”
Section: Introductionmentioning
confidence: 99%
“…In this work, we explored the efficiency of a pure silica PWN-type (Si-PWN) zeolite membrane for N 2 /CO 2 separation. The technique of employing the pure silica form of zeolite was first reported by Diaz–Cabanas, and high-silica membrane was greatly preferred in gas separation studies. ,, The kinetic diameters of N 2 and CO 2 gases are quite close, which makes their separation challenging. Additionally, applying a new zeolite membrane system for specific separation is very difficult and needs detailed information on the complex transport mechanisms at the molecular level.…”
Section: Introductionmentioning
confidence: 99%