Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity

The immobilization of three homogeneous catalysts namely; sulfonic acid, 1,1,3,3-tetramethyl guanidine and 1,5,7-triazabicyclo[4.4.0]dec-5-ene guanidine was carried out on silica from rice husk ash. Sodium silicate from the rice husk ash was immobilised with 3-(mercaptopropyl)trimethoxysilane. Th...

Full description

Saved in:

Bibliographic Details
Main Author:	Batagarawa, Muazu Samaila
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TP1-1185 Chemical technology
Online Access:	http://eprints.usm.my/46167/1/Muazu%20Samaila%20Batagarawa24.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.46167
record_format	uketd_dc
spelling	my-usm-ep.461672020-02-11T02:41:17Z Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity 2014-02 Batagarawa, Muazu Samaila TP1-1185 Chemical technology The immobilization of three homogeneous catalysts namely; sulfonic acid, 1,1,3,3-tetramethyl guanidine and 1,5,7-triazabicyclo[4.4.0]dec-5-ene guanidine was carried out on silica from rice husk ash. Sodium silicate from the rice husk ash was immobilised with 3-(mercaptopropyl)trimethoxysilane. This was further oxidised to sulfonic acid in a simple one pot method. The solid acid catalyst was denoted as RHAPrSO3H. Analysis of the catalyst by nitrogen adsorption-desorption using Brunauer, Emmet and Teller (BET) method showed its surface area to be 340 m2g-1 with average pore volume of 0.24 cc g-1 and pore diameter of 2.9 nm. Acidity tests by cation exchange capacity and pyridine FT-IR adsorption, revealed the presence of acid sites on the catalyst surface. Similarly, the 29Si MAS NMR of RHAPrSO3H revealed the presence of Q4, Q3, T3, T2 and T1 silicon centres, while only Q4 and Q3 silicon centres were present in RHASiO2. The catalyst was used in the acetalization reaction of glycerol with benzaldehyde. Under the best reaction conditions of 120 °C temperature, 2:1 molar ratio of glycerol: benzaldehyde, 0.15g mass of catalyst and 8 h reaction time, significant conversion was achieved with high selectivity towards five member ring isomer. 2014-02 Thesis http://eprints.usm.my/46167/ http://eprints.usm.my/46167/1/Muazu%20Samaila%20Batagarawa24.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TP1-1185 Chemical technology
spellingShingle	TP1-1185 Chemical technology Batagarawa, Muazu Samaila Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity
description	The immobilization of three homogeneous catalysts namely; sulfonic acid, 1,1,3,3-tetramethyl guanidine and 1,5,7-triazabicyclo[4.4.0]dec-5-ene guanidine was carried out on silica from rice husk ash. Sodium silicate from the rice husk ash was immobilised with 3-(mercaptopropyl)trimethoxysilane. This was further oxidised to sulfonic acid in a simple one pot method. The solid acid catalyst was denoted as RHAPrSO3H. Analysis of the catalyst by nitrogen adsorption-desorption using Brunauer, Emmet and Teller (BET) method showed its surface area to be 340 m2g-1 with average pore volume of 0.24 cc g-1 and pore diameter of 2.9 nm. Acidity tests by cation exchange capacity and pyridine FT-IR adsorption, revealed the presence of acid sites on the catalyst surface. Similarly, the 29Si MAS NMR of RHAPrSO3H revealed the presence of Q4, Q3, T3, T2 and T1 silicon centres, while only Q4 and Q3 silicon centres were present in RHASiO2. The catalyst was used in the acetalization reaction of glycerol with benzaldehyde. Under the best reaction conditions of 120 °C temperature, 2:1 molar ratio of glycerol: benzaldehyde, 0.15g mass of catalyst and 8 h reaction time, significant conversion was achieved with high selectivity towards five member ring isomer.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Batagarawa, Muazu Samaila
author_facet	Batagarawa, Muazu Samaila
author_sort	Batagarawa, Muazu Samaila
title	Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity
title_short	Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity
title_full	Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity
title_fullStr	Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity
title_full_unstemmed	Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity
title_sort	studies on the heterogenisation of sulphonic acid and guanidines on silica and their catalytic activity
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2014
url	http://eprints.usm.my/46167/1/Muazu%20Samaila%20Batagarawa24.pdf
_version_	1747821624769380352

Studies On The Heterogenisation Of Sulphonic Acid And Guanidines On Silica And Their Catalytic Activity

Similar Items