PENGARUH LAJU ALIR GAS PEMBAWA TERHADAP PEMBUATAN KATALIS HETEROGEN NANOKOMPOSIT ZnO/Fe 2 O 3

Abstract

<strong><strong></strong></strong><p>Abstract: Biodiesel is an alternative fuel. Biodiesel was produced through the transesterification<br />of vegetable oils or animal with the aid of a catalyst. One of them is the ZnO heterogeneous<br />catalyst which have high reaction yield. To increase the yield of the reaction, the size of the<br />catalyst needs to be minimized, but the separation be more difficult. Fe<br />2<br />O<br />3<br />compounds was<br />added to separation due to its magnetic properties. This study was conducted to obtain nanocomposite<br />ZnO/<br />Fe<br />2<br />O<br />3<br />heterogeneous catalysts and determine the effect of carrier gas flow rate<br />on the characteristics of the catalyst particle by pyrolisis flame spray method. Precursor solution<br />of Zn(NO<br />3<br />)2<br />and Fe (NO<br />3<br />)3<br />was nebulized on Nebulizer OMRON NEU-17 and flows to the<br />burner tube with the different carrier gas flow rate. At the same time, LPG gas burners and<br />combustion air was passed through the inner and outer annular burner. The solid combustion<br />products was inhaled by exchauster and filtered by using a particle filter. The solid particles<br />obtained was analyzed by XRD, SEM, and BET. The results of XRD analysis showed that the<br />smaller the carrier gas flow rate the greater intensity of radiation so that it gained the better<br />crystallinity. The results of SEM and BET analysis showed that the mostly of the particles were<br />nano-sized. So the smaller the carrier gas flow rate, the smaller diameter is formed and the<br />larger the specific surface area.<br />Keywords: nanocomposite, carrier gas, flame spray pyrolysis</p>