Hydrogen Production Form Ethanol Steam Reforming That Chelated With React And Absorbtion

In this article,Hydrogen production from ethanol steam reforming over Ni/Al₂O₃ catalyst which was prepared by chelated with chitsan and Impregnation was investgated.Reaction effect with different ways of preparation and reaction condition were researched.And basicoxide were joined in by impregnation and mixed,then whose reaction effect was reseached.At last,specific surface,X radial diffraction,and the thermogravimetric analysis on Ni/Al₂O₃ was performed.The condition of preparation had a marked influence on catalyst 's effection.Carrier was aired at ambient'temperature which the proportion of aluminium nitrate and chitosan was 3.Then it was calcined at 600℃for 2 hours.Ni whose weight rate was 10%was loaded by impregnation with nickel nitrate.The impregnated catalyst was placed in air for 24h,and dried at 120℃ for 8h,then calcined at 550℃for 1h.In the fixed-bed reactor,the catalyst was reduced at 650℃for 1h.In this circs,the activity and selectivity of catalyst was ideal.When the reaction temperature was 500℃,the molar ratio of water and ethanol was 4,and space velocity was 9.6h^-1,selectivity of H₂ was 66.6%, ethanol translated completely,selectivity of CO and CH₄ were 4.2%and 12.9%,and selectivity of CO₂ was 16.3%.Basicoxide was joined as sorbent in by mixed(weight ratio of MgO and CaO are 10%and 90%)and impregnation(weight ratio of MgO and CaO are 5%and 10%).But the reaction result was not good as expected.And CaO was not suit as sorbent apparently.The result of token showed that oxidation state of 10Ni/Al₂O₃,oxide nickel dispersed among the surface of carrier.after it was reduced, monoplasmatic nickel crystal showed up.When reacting,Hydrogen produced from ethanol steam reforming by the combined action of oxide nickel and monoplasmatic nickel.And there was a proper proportion between them.After nickel was loaded,surface area,Diameter and volume of bore diminished. May be it had agglomerated after it was calcined.