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Kaolin-carbon adsorbents for carotene removal of red palm oil

Kaolin-carbon adsorbents were prepared with and without sulfuric acid pretreatment followed by activation-carbonization at 500°C. The total surface area of the resulting kaolin-carbon adsorbents was found to be decreased with the increase in kaolin loading. Sulfuric acid pretreatment of the precurso...

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Main Authors: Hussein, Mohd Zobir, Kuang, Dzulkefly, Zainal, Zulkarnain, Teck, Tan Kian
Format: Article
Language:English
Published: Academic Press 2001
Online Access:http://psasir.upm.edu.my/id/eprint/114751/1/114751.pdf
http://psasir.upm.edu.my/id/eprint/114751/
https://linkinghub.elsevier.com/retrieve/pii/S0021979700971753
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spelling my.upm.eprints.1147512025-01-28T07:50:12Z http://psasir.upm.edu.my/id/eprint/114751/ Kaolin-carbon adsorbents for carotene removal of red palm oil Hussein, Mohd Zobir Kuang, Dzulkefly Zainal, Zulkarnain Teck, Tan Kian Kaolin-carbon adsorbents were prepared with and without sulfuric acid pretreatment followed by activation-carbonization at 500°C. The total surface area of the resulting kaolin-carbon adsorbents was found to be decreased with the increase in kaolin loading. Sulfuric acid pretreatment of the precursor prior to the carbonization-activation processes resulted in the enhancement of total surface area but reduced the micropore surface area of the resulting adsorbents. At the same time, this improved carotene adsorption capacity from red palm oil. However, recovery of carotene from the carotene-adsorbed adsorbent is only improved when the acid pretreatment of the precursor was done at a high loading percentage of activated carbon. Similarly, the peroxide value (PV) increased. A maximum removal of carotene from red palm oil was obtained at 20% kaolin loading for both adsorbents prepared with and without sulfuric acid pretreatment with about 45 and 65% carotene removal, respectively, from a 30-ppm solution. This indicates that pretreatment with sulfuric acid, prior to the activation-carbonization process, increased the carotene uptake by the resulting adsorbent. However, a further increase in the kaolin loading resulted in the decrease of carotene removal. About 3-4% of carotene adsorbed can be recovered from both types of adsorbents under optimum condition, in which the percentage recovered decreased with the increase in kaolin loading. On the other hand, the PV increased with kaolin loading at around 54-64 mEq/kg for both types of adsorbents. It was also found that carotene uptake by the adsorbents is high if the adsorbent contains a high percentage of activated carbon. Similarly, carotene recovery is high and less oxidation can be observed, as indicated by the lower PV value. © 2001 Academic Press. Academic Press 2001 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/114751/1/114751.pdf Hussein, Mohd Zobir and Kuang, Dzulkefly and Zainal, Zulkarnain and Teck, Tan Kian (2001) Kaolin-carbon adsorbents for carotene removal of red palm oil. Journal of Colloid and Interface Science, 235 (1). pp. 93-100. ISSN 0021-9797; eISSN: 0021-9797 https://linkinghub.elsevier.com/retrieve/pii/S0021979700971753 10.1006/jcis.2000.7175
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Kaolin-carbon adsorbents were prepared with and without sulfuric acid pretreatment followed by activation-carbonization at 500°C. The total surface area of the resulting kaolin-carbon adsorbents was found to be decreased with the increase in kaolin loading. Sulfuric acid pretreatment of the precursor prior to the carbonization-activation processes resulted in the enhancement of total surface area but reduced the micropore surface area of the resulting adsorbents. At the same time, this improved carotene adsorption capacity from red palm oil. However, recovery of carotene from the carotene-adsorbed adsorbent is only improved when the acid pretreatment of the precursor was done at a high loading percentage of activated carbon. Similarly, the peroxide value (PV) increased. A maximum removal of carotene from red palm oil was obtained at 20% kaolin loading for both adsorbents prepared with and without sulfuric acid pretreatment with about 45 and 65% carotene removal, respectively, from a 30-ppm solution. This indicates that pretreatment with sulfuric acid, prior to the activation-carbonization process, increased the carotene uptake by the resulting adsorbent. However, a further increase in the kaolin loading resulted in the decrease of carotene removal. About 3-4% of carotene adsorbed can be recovered from both types of adsorbents under optimum condition, in which the percentage recovered decreased with the increase in kaolin loading. On the other hand, the PV increased with kaolin loading at around 54-64 mEq/kg for both types of adsorbents. It was also found that carotene uptake by the adsorbents is high if the adsorbent contains a high percentage of activated carbon. Similarly, carotene recovery is high and less oxidation can be observed, as indicated by the lower PV value. © 2001 Academic Press.
format Article
author Hussein, Mohd Zobir
Kuang, Dzulkefly
Zainal, Zulkarnain
Teck, Tan Kian
spellingShingle Hussein, Mohd Zobir
Kuang, Dzulkefly
Zainal, Zulkarnain
Teck, Tan Kian
Kaolin-carbon adsorbents for carotene removal of red palm oil
author_facet Hussein, Mohd Zobir
Kuang, Dzulkefly
Zainal, Zulkarnain
Teck, Tan Kian
author_sort Hussein, Mohd Zobir
title Kaolin-carbon adsorbents for carotene removal of red palm oil
title_short Kaolin-carbon adsorbents for carotene removal of red palm oil
title_full Kaolin-carbon adsorbents for carotene removal of red palm oil
title_fullStr Kaolin-carbon adsorbents for carotene removal of red palm oil
title_full_unstemmed Kaolin-carbon adsorbents for carotene removal of red palm oil
title_sort kaolin-carbon adsorbents for carotene removal of red palm oil
publisher Academic Press
publishDate 2001
url http://psasir.upm.edu.my/id/eprint/114751/1/114751.pdf
http://psasir.upm.edu.my/id/eprint/114751/
https://linkinghub.elsevier.com/retrieve/pii/S0021979700971753
_version_ 1823093261696237568
score 13.244413

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