UPM Institutional Repository

Regeneration and characterization of spent bleaching clay


Abd. Wafti, Nur Sulihatimarsyila and Cheah, Kien Yoo and Siew, Wai Lin and Choong, Thomas Shean Yaw and Abdullah, Luqman Chuah (2011) Regeneration and characterization of spent bleaching clay. Journal of Oil Palm Research, 23 (Apr.). pp. 999-1004. ISSN 1511-2780


Spent bleach­ing clay (SBC), a solid waste gen­er­ated from the palm oil refin­ery, may be recy­cled rather than being sim­ply dis­posed off in land­fills. The aim of this research was to inves­ti­gate the heat regen­er­a­tion of SBC and to eval­u­ate the per­for­mance of the heat-treated SBC in bleach­ing crude oil. Two types of SBC were used, i.e. (a) acid-activated clay, and (b) nat­ural clay. Two types of regen­er­a­tion processes were per­formed, i.e. (a) sol­vent extrac­tion fol­lowed by heat treat­ment, and (b) direct heat treat­ment. Heat treat­ment was con­ducted in a box fur­nace at tem­per­a­tures rang­ing from 400°C to 800°C. Red colour indices of oils were used to deter­mine the regen­er­a­tion effi­ciency. Spent bleach­ing clay pro­duced by the direct heated-regenerated spent bleach­ing clay (HRSBC) yielded a higher regen­er­a­tion effi­ciency than the deoiled-heated-regenerated spent bleach­ing clay (DHRSBC) pro­duced by sol­vent extrac­tion and heat treat­ment. This is because mois­ture, impu­ri­ties and dirt were more com­pletely removed by direct heat­ing than by sol­vent extrac­tion. Spe­cific sur­face area, total pore vol­ume and aver­age pore size of SBC were mea­sured using the nitro­gen adsorption-desorption method. The results show that the HRSBC at 500°C pos­sessed a higher spe­cific sur­face area and total pore vol­ume and gave a bet­ter bleach­ing effi­ciency than HRSBC at 400°C and 800°C. All the regen­er­ated SBC sam­ples were meso­porous material.

Download File

PDF (Abstract)
Regeneration and characterization of spent bleaching clay.pdf

Download (86kB) | Preview

Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Malaysian Palm Oil Board
Keywords: Spent bleaching clay; Adsorbent; Regeneration; Physical properties
Depositing User: Muizzudin Kaspol
Date Deposited: 05 Aug 2014 04:14
Last Modified: 23 Feb 2018 03:57
URI: http://psasir.upm.edu.my/id/eprint/23465
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item