Glycerol purification using reactivated spent bleaching earth from palm oil refineries: Zero-waste approach

Yuliana, Maria, Trisna, Luciana, Sari, Feprita and Lunardi, Valentino Bervia (2022) Glycerol purification using reactivated spent bleaching earth from palm oil refineries: Zero-waste approach. Glycerol purification using reactivated spent bleaching earth from palm oil refineries: Zero-waste approach, 9 (3). p. 105239. ISSN p-ISSN: 2213-2929 e-ISSN: 2213-3437

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Abstract

This work uses reactivated spent bleaching earth (RSE) from palm oil refineries to reduce the impurities content (e.g., free fatty acid (FFA), carotenoid and chlorophyll) in crude glycerol. The influences of three important reactivation parameters on the removal of impurities are studied. The maximum removal percentage of all impurities is obtained using the RSE fabricated at activation temperature T = 40 ◦C, n-hexane to spent earth ratio mh = 15, and surfactant loading mc = 0.75 wt%; which, hereinafter referred to as RSE-m. Further glycerol purification test using RSE-m at various adsorption temperature (Ta) and RSE-m loading (ma) show that FFA, carotenoid, and chlorophyll are effectively reduced by 47.45, 93.39, and 96.63 wt%, respectively, at Ta = 50 ◦C and ma = 10 wt%., with all specification comparable, if not superior, to those of commercial industrial grade glycerol. The kinetic, isotherm and thermodynamic studies also suggest that the adsorption of the pigmented compounds on the RSE-m surface is spontaneous, endothermic, and driven by physical attraction via hydrophobic binding (for both pigments) and electrostatic interaction (for chlorophyll only). The adsorption results indicate that RSE-m has a great affinity to all glycerol impurities, and can be considered as a promising adsorbent for glycerol purification. As this study implements the zero-waste approach by using RSE, it will prominently reduce the solid waste generated by the pal the refining of glycerol.

Item Type:	Article
Uncontrolled Keywords:	Reactivated spent bleaching earth Surfactant intercalation Glycerol purification Mechanism study Isotherm study Zero-waste approach
Subjects:	Engineering > Chemical Engineering
Divisions:	Journal Publication
Depositing User:	F.X. Hadi
Date Deposited:	17 Nov 2023 01:43
Last Modified:	02 Feb 2024 03:26
URI:	http://repository.ukwms.ac.id/id/eprint/37367

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