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Unformatted text preview: SPENT BLEACHING CLAY Boey Peng Lim and Shangeetha Ganesan School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] A study was done to convert the residual oil adsorbed on spent bleaching cla y into biodiesel and subsequently regenerate the recovered clay. Ultrasound aided in-situ transesterification was done to convert the adsorbed residual oil into biodiesel. Petroleum ether was added as a co -solvent in the reaction mixture to enhance the yield of methyl esters. The methyl ester produced was analyzed using gas chromatography and the conversion was found to be 75.2 %. Then, the remaining clay was calcined and FTIR analysis of the calcined clay showed same significant peaks as the fresh bleachin g clay. TGAFTIR analysis showed that regenerated clay has two signatures endothermic weight loss peaks, similar to the thermal decomposition of fresh bleaching clay. Surface area and pore structure analysis showed that the regenerated clay have smaller surface area and bigger average pore diameter compared to the fresh bleaching clay. The regenerated clay was reutilized for bleaching of crude palm oil. The efficiency of the regenerated clay was determined by measuring the carotene content of the bleached o il. Stability test, deterioration of bleachability index (DOBI) was done on the oil bleached with regenerated clay and fresh bleaching clay and compared with DOBI of crude palm oil. Results showed that the quality of bleached oil was not affected by the regenerated clay. IND-P4 TRANSESTERIFICATION OF PALM OLEIN USING RICE HUSK ASH AS A HETEROGENEOUS CATALYST Boey Peng Lim, Gaanty Pragas Maniam and Lingeswarran Muniandy School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] Production of methyl esters or commonly known as biodiesel from vegetable oils by transesterification using heterogeneous catalysts has created a wave this past decade as the rush for fossil fuel has become more desperate and expensive. In this study, normal and acid treated rice husk ash were used as heterogeneous catalysts to carry out transesterification of palm olein. The catalyst has been characterised...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11