Kinetic and process study for ethanol reforming using a Rh/Pt washcoated monolith catalyst

The reforming of pure ethanol was studied over a bi-metallic precious metal (Rh/Pt) catalyst deposited on a ceramic monolith in order to analyze reforming process conditions. High ethanol conversion tests performed at low space velocities (<20,000 h ) confirmed that the catalyst could achieve 100% ethanol conversion to equilibrium concentrations of H2, CO, CO2 and CH4. Low conversion tests at high space velocities ( 50,000 h ) were conducted to produce an overall rate expressionwith an activation energy of 85 kJ mole . The reaction was found to have a 1.2 reaction order for ethanol and zero order for water for stoichiometric ethanol and water ratios. In addition, the impact of non-catalytic reactions was studied. The results showed that the catalystwas capable of reforming ethanol aswell as the by-products from non-catalytic reactions at 500–700 8C. This work is part 1 of a series to develop a process for steam reforming E85 (85% ethanol + 15% gasoline) to generate hydrogen for a fuel cell. 2008 Elsevier B.V. All rights reserved. * Corresponding author. E-mail address: [email protected] (M. Castaldi).