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- W2069156935 abstract "Immobilized lipase has the potential to be the catalyst of choice for biodiesel production since it is efficient, effective, and environmentally friendly; however, the stability and activity of lipase must be addressed before enzymatic biodiesel production processes can be industrially accepted. This study investigates an enzyme immobilization procedure that immobilizes lipase in a sol–gel supported on diatomaceous earth (Celite® R632), and determines its potential for biodiesel production in terms of achievable conversion and apparent stability. Four immobilized materials (lipase sol–gels with and without Celite® at two protein loading levels) were compared in terms of their immobilized protein content, conversion of methanol to methyl oleate, lipase activity, long term stability, and glycerol–water adsorption. The Celite® R632 sol–gel with high protein loading achieved the maximum conversion in the 6-h reaction period (90%). A drying step was found to be advantageous prior to the reaction, and the absorption of glycerol–water on the Celite® was only found to be significant at high levels of glycerol. The material was found to be very stable upon storage at 4 °C for up to 1.5 years, losing only about 15% of its percent conversion capacity per year. Based on this study, the supported immobilization technique shows significant potential as a novel catalyst for biodiesel production." @default.
- W2069156935 created "2016-06-24" @default.
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- W2069156935 date "2012-05-01" @default.
- W2069156935 modified "2023-10-05" @default.
- W2069156935 title "Evaluation of diatomaceous earth supported lipase sol–gels as a medium for enzymatic transesterification of biodiesel" @default.
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- W2069156935 doi "https://doi.org/10.1016/j.molcatb.2012.01.014" @default.
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