SINTESIS BIODIESEL DARI MINYAK GORENG BEKAS MENGGUNAKAN KATALIS CaO DARI CANGKANG SIPUT GONGGONG (Strombus canarium) DIIMPREGNASI KOH VARIASI: RASIO MOL MINYAK-METANOL DAN BERAT KATALIS

Abstract

The gonggong snail are widely consumed as a part of culinary tour that is in demanded by tourists. As a result, the waste of gonggong snail shells increases. Therefore, to reduce its waste, the gonggong snails are used as a heterogeneous catalyst in making biodiesel using used cooking oil as raw material. The shells of calcined gonggong snails are calcined at a temperature of 900 °C, then impregnated with KOH, and then the catalyst was calcined once again at 600 °C for 5 hours. The catalyst activity was tested studied through a transesterification reaction with a oil:methanol mole ratio of 1:15 and 3% w/w catalyst weight, at temperature of 60 °C, and stirring speed of 500 rpm for 3 hours. The yield of CaO catalyst biodiesel from gonggong snail shells was 91,1801%. The characterization of biodiesel produced in this study were water content of 0,018%, specific gravity of 888 kg/m3, viscosity of 3,29 mm2/s, acid number 0,52 mh KOH/g, number of lathering 388,05 mh KOH/g, number of iodine 54,71 g Iod/100g according to SNI 7182-2015.