Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production

Calcination temperature greatly influences the total basicity and surface area of catalysts. Investigations were conducted on calcium and niobium (CaO-Nb2O5) mixed oxides catalysts prepared via conventional solid state method (oxides were mixed and ground in agate mortar) and calcined at different t...

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Main Authors:	Y.C., Wong, Y.P., Tan, Y.H., Taufiq-Yap, Ramli, I.
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2014
Online Access:	http://journalarticle.ukm.my/7161/ http://journalarticle.ukm.my/7161/ http://journalarticle.ukm.my/7161/1/18_Y.C._Wong.pdf

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recordtype	eprints
spelling	ukm-71612016-12-14T06:43:16Z http://journalarticle.ukm.my/7161/ Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production Y.C., Wong Y.P., Tan Y.H., Taufiq-Yap Ramli, I. Calcination temperature greatly influences the total basicity and surface area of catalysts. Investigations were conducted on calcium and niobium (CaO-Nb2O5) mixed oxides catalysts prepared via conventional solid state method (oxides were mixed and ground in agate mortar) and calcined at different temperatures ranging from 300-800oC for 5 h. The catalysts were then characterized by using X-ray diffraction (XRD), CO2 temperature-programmed desorption (TPD-CO2), Brunauer-Emmett-Teller (BET) surface area analyzer and scanning electron microscope (SEM). The formation of Ca(OH)2 and CaCO3 at lower calcination temperatures (< 600oC) reduced the surface area of the catalyst and masked the basic active sites, hence lowered the total basicity of the catalyst. Besides, low surface area and total basicity were observed at higher calcination temperatures (> 600oC), due to sintering of the fine crystals, which promotes cluster agglomeration. Thus, the optimum calcination temperature for CaO/Nb2O5 mixed oxides was 600oC, which produced the largest surface area (7 m2/g) and total basicity (1301 μmol/g). The biodiesel was produced via transesterification of palm oil, methanol and the catalysts calcined at various temperatures. CaO/Nb2O5 mixed oxide calcined at 600oC showed the highest biodiesel conversion (98%) with methanol/oil molar ratio of 12, 3 wt.% of catalyst, a reaction temperature of 65oC and reaction time of 2 h. Universiti Kebangsaan Malaysia 2014-05 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/7161/1/18_Y.C._Wong.pdf Y.C., Wong and Y.P., Tan and Y.H., Taufiq-Yap and Ramli, I. (2014) Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production. Sains Malaysiana, 43 (5). pp. 783-790. ISSN 0126-6039 http://www.ukm.my/jsm/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Calcination temperature greatly influences the total basicity and surface area of catalysts. Investigations were conducted on calcium and niobium (CaO-Nb2O5) mixed oxides catalysts prepared via conventional solid state method (oxides were mixed and ground in agate mortar) and calcined at different temperatures ranging from 300-800oC for 5 h. The catalysts were then characterized by using X-ray diffraction (XRD), CO2 temperature-programmed desorption (TPD-CO2), Brunauer-Emmett-Teller (BET) surface area analyzer and scanning electron microscope (SEM). The formation of Ca(OH)2 and CaCO3 at lower calcination temperatures (< 600oC) reduced the surface area of the catalyst and masked the basic active sites, hence lowered the total basicity of the catalyst. Besides, low surface area and total basicity were observed at higher calcination temperatures (> 600oC), due to sintering of the fine crystals, which promotes cluster agglomeration. Thus, the optimum calcination temperature for CaO/Nb2O5 mixed oxides was 600oC, which produced the largest surface area (7 m2/g) and total basicity (1301 μmol/g). The biodiesel was produced via transesterification of palm oil, methanol and the catalysts calcined at various temperatures. CaO/Nb2O5 mixed oxide calcined at 600oC showed the highest biodiesel conversion (98%) with methanol/oil molar ratio of 12, 3 wt.% of catalyst, a reaction temperature of 65oC and reaction time of 2 h.
format	Article
author	Y.C., Wong Y.P., Tan Y.H., Taufiq-Yap Ramli, I.
spellingShingle	Y.C., Wong Y.P., Tan Y.H., Taufiq-Yap Ramli, I. Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production
author_facet	Y.C., Wong Y.P., Tan Y.H., Taufiq-Yap Ramli, I.
author_sort	Y.C., Wong
title	Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production
title_short	Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production
title_full	Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production
title_fullStr	Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production
title_full_unstemmed	Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production
title_sort	effect of calcination temperatures of cao/nb2o5 mixed oxides catalysts on biodiesel production
publisher	Universiti Kebangsaan Malaysia
publishDate	2014
url	http://journalarticle.ukm.my/7161/ http://journalarticle.ukm.my/7161/ http://journalarticle.ukm.my/7161/1/18_Y.C._Wong.pdf
first_indexed	2023-09-18T19:48:55Z
last_indexed	2023-09-18T19:48:55Z
_version_	1777406087515865088

Effect of calcination temperatures of CaO/Nb2O5 mixed oxides catalysts on biodiesel production

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