Thermodynamic Analysis of Hydrogen Production from Methanol-Ethanol-Glycerol Mixture Through Dry Reforming
Zaki Yamani Zakaria, Mazura Jusoh, Ramli Mat, Mohd Johari Kamarudin, Jega Jewaratnam
Abstract. Thermodynamic properties of methanol-ethanol-glycerol dry reforming have been studied with the method of Gibbs free energy minimization for hydrogen production from methanolethanol-glycerol mixture. Equilibrium compositions were determined as a function of CO2/methanol-ethanol-glycerol molar ratios (CMEG) (1:6-6:1) where methanol-ethanol-glycerol is 1:1:1; reforming temperatures (573-1273 K) at atmospheric pressure (unless stated otherwise).
Optimum conditions for hydrogen production are CMEG 1:6, temperature 1273, 1 bar pressure. This point is also optimum for the production of synthesis gas. Higher pressure and higher CMEG ratio does not encourage hydrogen formation. Under identified optimum conditions, carbon formation can be thermodynamically inhibited. Nevertheless, the carbon yield can be reduced through reforming at higher temperatures.
Keywords: methanol-ethanol-glycerol mixture, dry reforming, hydrogen production
