SINTESIS DAN KARAKTERISASI KATALIS CaO-SiO2 DARI CANGKANG KERANG DARAH DAN SABUT PINANG UNTUK PRODUKSI BIODIESEL
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Date
2023-12
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Elfitra
Abstract
Calcium oxide (CaO) is a catalyst that is widely used for biodiesel synthesis reactions
because it has relatively high base strength, but the CaO catalyst has the weakness of a low
surface area. Therefore, to increase biodiesel yield the CaO catalyst needs to be modified
using silica to increase the surface area of the catalyst and its catalytic activity. The aim of
this research is to synthesize and characterize the CaO catalyst modified by SiO2 areca palm
ash using the impregnation method with the SiO2 ratio of 3% w/w to the weight of CaO. The
resulting catalyst was applied for biodiesel production with yield optimization using a
Response Surface Methodology (RSM) design. Analysis using BET shows that the surface
area of CaO-SiO2 has increased. XRF analysis for the 3% CaO-SiO2 catalyst obtained a SiO2
composition of 0.66 and a CaO composition of 97.496%. Based on the optimum results, the
highest biodiesel yield was 94.29%.
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Keywords
biodiesel, catalyst, and silica
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