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Synthesis and Characterization of Bio-Glycerol from Cameroon palm kernel seed oil

Green and Sustainable Chemistry 2022年第2期12卷 28-40页

作者： Michael Bong Alang Ndikontar Maurice Kor Peter T. Ndifon Department of Applied Chemistry National School of Agro-Industrial Sciences (ENSAI) University of Ngaoundéré Ngaoundéré Cameroon Department of Inorganic Chemistry University of Yaoundé I Yaoundé Cameroon

Bio-glycerol was synthesized from Cameroon palm kernel oil (PKO) through the transesterification procedure. palm kernel oil extracted from palm kernel seeds using mechanical expression and solvent extraction was purified and characterized by physico-chemical methods and used in the transesterification process to give biodiesel and bio-glycerol. The biodiesel was purified and characterized as reported in previous articles. Our focus in this article is on glycerol, an important by-product of the transesterification process which has potential pharmaceutical, cosmetic and engineering applications. The bio-glycerol was purified by acidification and the purified glycerol was subjected to physical and chemical characterization. The specific gravity of glycerol was obtained as 1.2 kg/L, viscosity at 40°C gave 1500 cSt and 500 cSt at 100°C;pH was 7.4;the flash point was 160°C, and the ASTM color was 2.0 before purification and zero after purification. The sulfur content was 0.016%w/v. This sulfur content is low thus posing no environment threat. The chemical composition of the synthesized bio-glycerol determined using IR spectroscopy and gas chromatography-mass spectrometry (GC-MS) confirmed the known chemical structure of glycerol. The purification and analysis of bio-glycerol is important as it can find applications in the pharmaceutical, cosmetic and food industries inter alia.

关键词： palm kernel seed oil Transesterification Biodiesel Bio-Glycerol Physico-Chemical Characterization Viscosity GC-MS Flash Point

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