The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil

Nanoscale CaO was demonstrated as a high activity and selectivity catalyst for transesterification of crude palm oil. The CaO catalyst with particle sizes diameter of 12±4 nm and specific surface areas 70 m2g-1 was synthesized by sol-gel process. Photoluminesence spectra clearly demonstrated high nu...

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Main Authors: Rattana Thaoklua, Jaroon Janjaroen, Karaked Tedsree
Format: บทความวารสาร
Language:English
Published: Science Faculty of Chiang Mai University 2019
Online Access:http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=8976
http://cmuir.cmu.ac.th/jspui/handle/6653943832/64087
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spelling th-cmuir.6653943832-640872019-05-07T09:59:46Z The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil Rattana Thaoklua Jaroon Janjaroen Karaked Tedsree Nanoscale CaO was demonstrated as a high activity and selectivity catalyst for transesterification of crude palm oil. The CaO catalyst with particle sizes diameter of 12±4 nm and specific surface areas 70 m2g-1 was synthesized by sol-gel process. Photoluminesence spectra clearly demonstrated high number of oxide ions at low coordination sites (edges and corners) of nano CaO. FT-IR spectra showed that oxide ions at low coordination sites can accelerate deprotonation of methanol and glycerol at room temperature. Highly reactive calcium methoxide and calcium glyceroxide species were formed at room temperature leading to high reaction kinetic of transesterification. A high yield of fatty acid methyl esters (% FAME) of 98% was achieved within 30 min with 2.0 wt% of nano CaO catalyst. High formation of calcium methoxide at room temperature leads to high selectivity of transesterification leading to decrease in the level of calcium soap from saponification of free fatty acid. These active species promote transesterification in the forward direction, increasing the rate of conversion and reduction of soap formation. 2019-05-07T09:59:46Z 2019-05-07T09:59:46Z 2018 บทความวารสาร 0125-2526 http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=8976 http://cmuir.cmu.ac.th/jspui/handle/6653943832/64087 Eng Science Faculty of Chiang Mai University
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Nanoscale CaO was demonstrated as a high activity and selectivity catalyst for transesterification of crude palm oil. The CaO catalyst with particle sizes diameter of 12±4 nm and specific surface areas 70 m2g-1 was synthesized by sol-gel process. Photoluminesence spectra clearly demonstrated high number of oxide ions at low coordination sites (edges and corners) of nano CaO. FT-IR spectra showed that oxide ions at low coordination sites can accelerate deprotonation of methanol and glycerol at room temperature. Highly reactive calcium methoxide and calcium glyceroxide species were formed at room temperature leading to high reaction kinetic of transesterification. A high yield of fatty acid methyl esters (% FAME) of 98% was achieved within 30 min with 2.0 wt% of nano CaO catalyst. High formation of calcium methoxide at room temperature leads to high selectivity of transesterification leading to decrease in the level of calcium soap from saponification of free fatty acid. These active species promote transesterification in the forward direction, increasing the rate of conversion and reduction of soap formation.
format บทความวารสาร
author Rattana Thaoklua
Jaroon Janjaroen
Karaked Tedsree
spellingShingle Rattana Thaoklua
Jaroon Janjaroen
Karaked Tedsree
The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil
author_facet Rattana Thaoklua
Jaroon Janjaroen
Karaked Tedsree
author_sort Rattana Thaoklua
title The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil
title_short The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil
title_full The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil
title_fullStr The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil
title_full_unstemmed The Study of Activity and Selectivity of Calcium Oxide Nanocatalyst for Transesterification of High Free Fatty Acid Crude Palm Oil
title_sort study of activity and selectivity of calcium oxide nanocatalyst for transesterification of high free fatty acid crude palm oil
publisher Science Faculty of Chiang Mai University
publishDate 2019
url http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=8976
http://cmuir.cmu.ac.th/jspui/handle/6653943832/64087
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