Pengaruh Penambahan MgO Pada SiO2 Berbasis Silika Sekam Padi Terhadap Karakteristik Komposit MgO-SiO2 Dan Kesesuaiannya Sebagai Bahan Pendukung Katalis

Abstract

This research have been studied the effect of adding MgO on SiO on composite characteristics MgO-SiO22 based rice husk silica. Preparation of composites made by sol-gel method. composite calcined at of 700 °C. composites were characterized by SEM and catalytic activity test covers percent conversion and viscosity. Composite was applied as a catalyst. The results of the analysis of the microstructure (SEM) in the sample indicates that the sample has not formed granules, is a process of agglomeration, visible on the surface of the composite microstructure indicating Cluster MgO-SiO22 amorphous shape and EDS results showed the distributed main elements Mg, Si, and O in the sample. Test was conducted by catalyst applications test with transesterified reaction using pure coconut oil or VCO. Based on the test results of transesterification test for the six comparison samples, analysis of percent conversion and viscosity of the best results obtained on samples with a ratio of 1:1 with 82% conversion and viscosity of 12.693 mm /s. From the analysis of viscosity, the biodiesel obtained in the present study has not yet been said in the SNI biodiesel standard, because the viscosity values was obtained greater than the value of standard biodiesel.

Keywords: MgO-SiO
, sol-gel, transesterfication, SEM,% conversion and viscosity
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