Synthesis, Characterization and Catalytic Performance of H 3 SiW 12 O 40 SiO 2 Prepared by Sol-Gel Technique
Joint Authors
Ismail, M.
Jahim, J. M.
Isahak, Wan Nor Roslam Wan
Nordin, N. M.
Yarmo, Mohd Ambar
Source
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-09-15
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Engineering Sciences and Information Technology
Chemistry
Abstract EN
The purpose of this work is to study the synthesis, characterization, and catalytic performance of two types of solid heteropoly acid catalysts, namely, silicotungstic acid bulk (STAB) and STA-silica sol-gel (STA-SG) compared with sulfuric acid.
From the XPS analyses, there was a significant formation of W-O-Si, W-O-W, and Si-O-Si bonding in STA-SG compared to that in STAB.
The main spectra of O1s (90.74%, 531.5 eV) followed by other O1s peak (9.26%, 532.8 eV) were due to the presence of W-O-W and W-O-Si bonds, respectively.
The STA-SG catalyst was found to be the more environmentally benign solid acid catalyst for the esterification reaction between oleic acid and glycerol due to its lower toxicity supported by silica via sol-gel technique.
In addition, the ease of separation for STA-SG catalyst was attributed to its insoluble state in the product phase.
The esterification products were then analysed by FTIR and HPLC.
Both the H2SO4 and the STAB gave high conversion of 100% and 98% but at a lower selectivity of GME with 81.6% and 89.9%, respectively.
On the contrary, the STA-SG enabled a conversion of 94% but with a significantly higher GME selectivity of 95%, rendering it the more efficient solid acid catalyst.
American Psychological Association (APA)
Isahak, Wan Nor Roslam Wan& Ismail, M.& Nordin, N. M.& Jahim, J. M.& Yarmo, Mohd Ambar. 2011. Synthesis, Characterization and Catalytic Performance of H 3 SiW 12 O 40 SiO 2 Prepared by Sol-Gel Technique. Journal of Nanotechnology،Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-477171
Modern Language Association (MLA)
Isahak, Wan Nor Roslam Wan…[et al.]. Synthesis, Characterization and Catalytic Performance of H 3 SiW 12 O 40 SiO 2 Prepared by Sol-Gel Technique. Journal of Nanotechnology No. 2011 (2011), pp.1-6.
https://search.emarefa.net/detail/BIM-477171
American Medical Association (AMA)
Isahak, Wan Nor Roslam Wan& Ismail, M.& Nordin, N. M.& Jahim, J. M.& Yarmo, Mohd Ambar. Synthesis, Characterization and Catalytic Performance of H 3 SiW 12 O 40 SiO 2 Prepared by Sol-Gel Technique. Journal of Nanotechnology. 2011. Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-477171
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-477171