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The effect of mechanical grinding on the mesoporosity of steam-activated palm kernel shell activated carbons


Citation

Mak, S. M. and Tey, Beng Ti and Cheah, Kien Yoo and Siew, Wai Lin and Tan, Kheng Ka (2009) The effect of mechanical grinding on the mesoporosity of steam-activated palm kernel shell activated carbons. Journal of Chemical Technology and Biotechnology, 84 (9). pp. 1405-1411. ISSN 0268-2575; ESSN: 1097-4660

Abstract

Background: Palm kernel shell activated carbon (OPSA) produced by steam gasification at high temperatures generally results in high surface areas of 1146 to 1600 m2 g−1, attributed to the high volume of micropores (0.43 to 0.56 cm3 g−1). The mesoporosity of naturally occurring activated carbons is observed to increase with decreasing particle size. Mechanical grinding was therefore performed to investigate its effect on the mesoporosity and microporosity of OPSA. Results: Mechanical grinding had a strong effect on mesopore volume and average pore diameter, with an increase in mesopore volume from 47 to 66% as particle size decreases. Interestingly, no significant effect on the micropore fraction was observed in ground OPSA particles. Conclusions: The mechanically ground OPSA particles possessed dual adsorption capabilities due to the high microporosity and moderate mesoporosity contained in the structures. This results in interesting porosity behaviour of palm kernel shell activated carbons and the potential to provide materials of distinct sorption capacities with minimal treatment.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1002/jctb.2235
Publisher: Society of Chemical Industry
Keywords: Mesoporosity; Microporosity; Palm kernel shell activated carbon; Adsorption isotherms; Mechanical grinding
Depositing User: Nabilah Mustapa
Date Deposited: 14 Aug 2015 12:37
Last Modified: 22 Oct 2015 01:36
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1002/jctb.2235
URI: http://psasir.upm.edu.my/id/eprint/15584
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