Study On Catalytic Steam Reforming Of Ethanol For Hydrogen Production

Hydrogen is regarded as a kind of environmentally friendly clean energy and has been paid more and more attention. Catalytic steam reforming of bi-oil is a kind of feasible solution for future hydrogen production.In this paper, the thermodynamic analysis of bio-oil and reaction conditions of ethanol steam reforming were studied and thermodynamic analysis was analysed by Gibbs energy minimization method.With using thermal gravimetric analysis of bio-oil in different heating rates (10,20,30℃/min), TG, DTG, DSC curve was derived. After analysis, the process of weight loss of the bio-oil-soluble in an air atmosphere is divided into three stages, volatile of low-volatile substances, pyrolysis of light components of oil, combustion of coke. With the increase of heating rate, the temperature peak of maximum weight loss tended to be increased and the maximum weight loss rate was10.3%/min,26.4%/min and42.5%/min. Due to the activation energy for volatilization was relatively higher than pyrolysis section, the thermal stage was more easier.With adding CeO2or La2O3and the active group NiO to catalyst support attapulgite, Ni/attapulgite and Ni/attapulgite-CeO2-La2O3were prepared. The affect of reaction temperature, water alcohol ratio, feed airspeed, content of nickel were studied by steam reforming reaction of ethanol.Based on the minimization of Gibbs free energy, the content of each component of the product at different temperatures, water alcohol ratio was calculated by Matlab7.6.0fsolve function.