Browsing by Author "Zaidul, I.S.M."

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    The effect of flow rate at different pressures and temperatures on cocoa butter extracted from cocoa nib using supercritical carbon dioxide
    (2016-05) Asep, E.K.; Russly, A.R.; Ghafoor, K.; Zaidul, I.S.M.; Jinap, S.; Jahurul, M.H.A.
    The effects of flow rate, different pressures and temperatures on cocoa butter extracted from cocoa nib using supercritical carbon dioxide (scCOz) were investigated. The yield was analyzed for total fat content, triacylglycerol (TG) profile, and fatty acid (FA) profile. ExlTactions were carried out at pressW'es of 20 and 35 MPa, temperaturcs of 50 and 60 °C, and CO2 flow rates of 0.5, 1,2,4 mL min-I. The result shows that the yield of cocoa butter extract increased with increasing pressW'e, temperature, and flow rate and the optimum conditions for the maximum cocoa butter extraction were 35 MPa, 60 °C and 2 mL min-I, repectively. TGs and FAs were found to be similar in composition to those ofcocoa butter obtained by conventional methods. The lower molecular weight TGs and f As showed higher selectivity compared to higher molecular weight TGs and FAs.
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    Effects of supercritical carbon dioxide extraction parameters on virgin coconut oil yield and medium-chain triglyceride content
    (2009) Nik Norulaini, N.A.; Setianto, W.B.; Zaidul, I.S.M.; Nawi, A.H.; Azizi, C.Y.M.; Mohd Omar, A.K.
    The extraction of coconut oil has been performed using supercritical carbon dioxide (SC-CO2). The extractions were performed at pressure and temperature ranges of 20.7–34.5 MPa and 40–80 C, respectively. It was observed that almost all (more than 99%) of the total oil could be extracted. Response surface methodology (RSM) was applied to evaluate the effects of the parameters (pressure, temperature and CO2 consumption) on the extraction yield and medium-chain triglycerides (MCTs), in terms of the fatty acid content in the extracted oil. A correlation was established with p-values for both responses significant at the 95% confidence level.