<p>Abstract: Biodiesel as alternative energy can be produced by trans-esterification reaction of<br />vegetable oils or animal oils with homogeneous or heterogeneous catalysts. Heterogeneous<br />catalysts have several advantages over homogeneous catalysts that it is easier to be separated.<br />ZnO is one of the compounds that it has very high catalytic properties with a yield of 86.1%.<br />Making the catalyst is easier to be separated, Fe<br />2<br />O<br />3<br />is added to the matrix of ZnO. This<br />research was conducted to determine the effect of flow rate of burner gas (LPG) to the size of<br />catalyst particles with a fixed precursor composition (1:1) using a flame spray pyrolysis method.<br />The first procedure performed was nebulizing the precursor solution of Zn(NO<br />3<br />,<br />then the droplet was flowed through the tube to the burner. At the same time, turning on the<br />carrier gas and the burner gas (LPG) through inner pipe and annulus. Solids from the<br />combustion in the burner were sipped with exhauster and solid nanoparticles were filtered using<br />a bag filter. Then the solid product were separated from bag filter for further analysis. The<br />results were analyzed by XRD, SEM, and BET. From the results of XRD analysis, it was known<br />that the nanocomposite particles obtained were ZnO/Fe<br />2<br />O<br />3<br />. The results of SEM analysis<br />showed that the particles only have some nano-sized particles. They consisted of particles of<br />about 1 nm to 100 nm with percentage 35%; some submicron-sized particles (101 nm to 500<br />nm with percentage 45%; and some micron-sized particles (more than 500 nm) with percentage<br />20%. While the results of BET analysis described the specific area of particles, so that the<br />particle diameter could be calculated. It showed that the particles were nano-sized, namely<br />26.652 – 133.771 nm.<br />Keywords: nanocomposite, burner gas, flame spray pyrolysis<br />)2<br />and Fe(NO<br />3<br />)3</p>
CoAl2O4 blue nanopigments prepared by liquid-feed flame spray pyrolysis method
