DDR-type zeolite membrane synthesis, modification and gas permeation studies

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.

Download Full-text

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

Download Full-text

Synthesis and preliminary gas permeation studies of a tubular NaA zeolite membrane (NZM)

Chemical Engineering Communications ◽

10.1080/00986445.2017.1347566 ◽

2017 ◽

Vol 204 (10) ◽

pp. 1157-1166 ◽

Cited By ~ 2

Author(s):

Nong Xu ◽

Sang Moon Lee ◽

Sung Su Kim ◽

Anwu Li ◽

C. Jim Lim ◽

...

Keyword(s):

Gas Permeation ◽

Zeolite Membrane ◽

Naa Zeolite ◽

Permeation Studies ◽

Naa Zeolite Membrane

Download Full-text

Separation of Methane from Shuttle Tanker Vents Gases by Adsorption on a Polyurethane/Zeolite Membrane

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.733.42 ◽

2017 ◽

Vol 733 ◽

pp. 42-46

Author(s):

Habiba Shehu ◽

Edidiong Okon ◽

Edward Gobina

Keyword(s):

Carbon Dioxide ◽

Physical Properties ◽

Crude Oil ◽

Deep Water ◽

Separation Factor ◽

Gas Permeation ◽

Zeolite Membrane ◽

Alumina Support ◽

Molar Flux

Shuttle tankers are becoming more widely used in deep water installations as a means of transporting crude oil to storage plants and refineries. The emissions of hydrocarbon vapours arise mainly during loading and offloading operations. Experiments have been carried out on the use of polyurethane/zeolite membrane on an alumina support for the separation of methane from carbon dioxide and oxygen. The physical properties of the membrane were investigated by FTIR. Single gas permeation tests with methane, propane, oxygen and carbon dioxide at a temperature of 293 K and pressure ranging from 0.1 to 1.0 x 10-5 Pa were carried out. The molar flux of the gases through the membrane was in the range of 3 x 10-2 to 1 x 10-1 molm-2s-1. The highest separation factor of CH4/CO2 and CH4/O2 and CH4/C3H8 was determined to be 1.7, 1.7 and 1.6 respectively.

Download Full-text