شماره ركورد كنفرانس :
4518
عنوان مقاله :
Synthesis and characterization of W-type zeolite membrane:effect of synthesis temprature
Author/Authors :
Hojjatollah Maghsoodloorad Research Centre for Membrane Separation processes- Faculty of Chemical Engineering - Iran University of Science and Technology, Tehran , Toraj Mohammadi Research Centre for Membrane Separation processes- Faculty of Chemical Engineering - Iran University of Science and Technology, Tehran Research Centre for Membrane Separation processes- Faculty of Chemical Engineering - Iran University of Science and Technology, Tehran , Afshin Pak Research Centre for Membrane Separation processes- Faculty of Chemical Engineering - Iran University of Science and Technology, Tehran Research Centre for Membrane Separation processes- Faculty of Chemical Engineering - Iran University of Science and Technology, Tehran
كليدواژه :
W-type zeolite membrane , Gas separation , effect of synthesis temptature , Optimum synthesis condition
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
چكيده لاتين :
In this paper, effects of synthesis temperature on synthesis of W-type zeolite membrane were
investigated. Experiments were carried out at these levels of synthesis temperature: 165, 185 and
200 °C and synthesis time: 12. Permeation measurements and SEM analysis were used for
characterization of the synthesized membranes. The results showed that increasing synthesis
temperature from 165 up to 185 °C increases separation factor of O2/SF6, however, further
increasing decreases the separation performance. The same trend was observed for synthesis time
for the synthesized zeolite W membrane. This behavior was attributed to the effect of synthesis
temperature on selectivity. More zeolite crystals are deposited, and larger crystals are formed at
higher synthesis temperatures. Formation of larger crystals increases zeolite layer integration rate,
which is responsible for gas separation, in one hand and reduces deposited zeolite layer density,
due to the more void formation, on the other hand. In the optimum condition, W-type zeolite
membrane was synthesized at 185 °C for 12 h with a high separation factor of 12.
