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Surface modification of ?-Alumina support in synthesis of silica membrane for hydrogen purification
- Source :
- International journal of hydrogen energy 39 (2014): 18585–18591. doi:10.1016/j.ijhydene.2014.05.056, info:cnr-pdr/source/autori:Jabbari A.; Ghasemzadeh K.; Khajavi P.; Assa F.; Abdi M.A.; Babaluo A.A.; Basile A./titolo:Surface modification of ?-Alumina support in synthesis of silica membrane for hydrogen purification/doi:10.1016%2Fj.ijhydene.2014.05.056/rivista:International journal of hydrogen energy/anno:2014/pagina_da:18585/pagina_a:18591/intervallo_pagine:18585–18591/volume:39
- Publication Year :
- 2014
- Publisher :
- Pergamon Press., New York, Regno Unito, 2014.
-
Abstract
- In this work, an experimental study was carried out on the synthesis of silica membrane for hydrogen purification, in which synthesis of γ-alumina intermediate layer using cheaper and safer source was investigated. For this purpose, aluminum hydroxide was selected and the bohmite sols were prepared by acid or base catalyzed hydrolysis of the different salts for comparing with alkoxide source. The SEM micrographs showed no distinct γ-alumina layer on the substrate coated by base catalyzed sol of salt (sample 1), while a homogeneous γ-alumina layer was formed by acid catalyzed sol of salt (sample 2). After γ-alumina layer formation, the gas permeance mechanism was approximately changed. These results were similar to SEM results and N 2 permeance experiments of sample 3 in which substrate was coated with alkoxide sol. However, the γ-alumina layer of sample 2 had no good adhesion to the substrate. Nevertheless, use of aluminum hydroxide can be promised to synthesis of γ-alumina layer; the membrane was synthesized on the modified support with aluminum tri-sec-butylate sol. In particular, in the synthesized silica membrane as the temperature increases, permselectivity of H 2 /CO 2 and H 2 /N 2 increases from 4.7 and 7.3 at room temperature to 9.4 and 11.6 at 100 °C and to 23.4 and 31.3 at 200 °C, respectively.
- Subjects :
- chemistry.chemical_classification
Materials science
Activated molecular sieving
Base (chemistry)
genetic structures
Hydrogen purification
Renewable Energy, Sustainability and the Environment
Inorganic chemistry
Energy Engineering and Power Technology
Substrate (chemistry)
Permeance
Aluminum hydroxide ?-Alumina layer
equipment and supplies
Condensed Matter Physics
Catalysis
chemistry.chemical_compound
Amorphous silica membrane
Fuel Technology
Membrane
chemistry
Chemical engineering
Alkoxide
Hydroxide
Layer (electronics)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- International journal of hydrogen energy 39 (2014): 18585–18591. doi:10.1016/j.ijhydene.2014.05.056, info:cnr-pdr/source/autori:Jabbari A.; Ghasemzadeh K.; Khajavi P.; Assa F.; Abdi M.A.; Babaluo A.A.; Basile A./titolo:Surface modification of ?-Alumina support in synthesis of silica membrane for hydrogen purification/doi:10.1016%2Fj.ijhydene.2014.05.056/rivista:International journal of hydrogen energy/anno:2014/pagina_da:18585/pagina_a:18591/intervallo_pagine:18585–18591/volume:39
- Accession number :
- edsair.doi.dedup.....7064ccbf4c86a39c45389519385732b0