Praveen Bollini, University of Houston (IMAGE) University of Houston Caption Praveen Bollini, assistant professor of chemical and biomolecular engineering at the University of Houston, says a catalyst using bulk cerium oxide -- the most abundant of the rare earth elements in the earth's crust -- can efficiently remove the excess oxygen from biomass, allowing it to be economically converted to fuels and chemicals. Credit University of Houston Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.