Effect of SiO2 Concentration and Time on Stability of TiO2 Zeolite Nanocomposite Membrane in Light Gas Dehumidification

Document Type : Original Article

Authors

1 Department of Chemical Engineering, Arak Branch, Islamic Azad University, Arak, Iran

2 Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran

Abstract

The main goal of this research is to use zeolite TiO2 nanocomposite membranes in order to remove moisture from gas. For this reason, a certain TiZ-V membrane was selected and manufactured as a standard membrane, which was the result of the initial assessment of a suitable membrane for gas dehumidification, and this membrane was used as a standard to measure the effect of manufacturing parameters. The findings showed that increasing the concentration of SiO2 had greatest effect on increasing the water flux of the membrane due to the effect of increasing the reaction time of the vapor phase carrier and reducing the selectivity drop at higher pressures. Also, the experiments of changing the relative humidity of the feed have shown the improving efficiency of the membrane in relative humidities lower than 80%, so that under the conditions of lower relative humidity, the selectivity of the membrane has increased. Another positive point found is a slight change in the selectivity efficiency of the membrane with respect to different relative humidities. This case showed the stability of membrane performance under the different conditions of humidity of the feed gas. Next, in order to increase the performance of membrane as much as possible, the sweeper gas was added from the inside of membrane. Increase in the sweeper gas, which increases the water concentration gradient and decreases the gas concentration gradient on the sides of membrane wall, increases the selectivity of membrane to the highest level of 543.

Graphical Abstract

Effect of SiO2 Concentration and Time on Stability of TiO2 Zeolite Nanocomposite Membrane in Light Gas Dehumidification

Keywords

Main Subjects

References

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International Journal of Engineering
Volume 37, Issue 2
TRANSACTIONS B: Applications
February 2024
Pages 365-376

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