The Effect Of Metal Catalyst On Gaseous Product From Pyrolysis Of Biomass In Molten Alkali

Hydrogen Production from Pyrolysis of Biomass can effectively cope with environmental and energy which are two hot issues. and it has bright prospective space of development, There are three means mainly to produce hygdrogen from biomass, that is by fast pyrolysis of biomass, synthesis gas exchange from biomass gasification and biomass hydrolysis. This paper discuss about the method of hydrogen production with molten salt as the medium of biomass fast pyrolysis.Based on the optimization and improvement, fast catalytic pyrolysis of biomass for hydrogen production in molten salt media is carried out in this paper. Molten salt acts as thermal carriers, solvents and catalysts. The composition of the gaseous product, liquid composition and content of the product, as well as solid carbide extent are investigated. And further research in the effect of alkali salt, temperature, and residence time on fast pyrolysis of biomass for hydrogen production.Experimental data show that melting alkali is benefit of fast pyrolysis of biomass for hydrogen production. H2 production rate increases with the increase of pyro lysis temperature. However, the carbon also increased, triggering device plug. It should choose the appropriate pyrolysis temperature, to achieve the highest efficiency of hydrogen economy. There are 76g hydrogen by Pyrolysis of rice straw per kg in theory Analysis showed that At 550℃, carrier gas flow rate of 100 L/h, biological fast pyrolysis by Molten alkali to produce 83 g H2 per kilogram. The reason that the real hydrogen production is larger than the theorical production is that the reaction of NaOH and CO, and reforming of C and H2O produce extra hydrogen. The product gas is almost H2 and CH4, except carrier gas, H2% is 89%, the remains is CH4 and precious little H2O. It means that the pyrolysis gas product is only two components mainly at the experimental conditions, and is convenient to purify hydrogen., so it will generate a considerable economic benefits. Meanwhile, no greenhouse gas CO2 emits.,it also shows that the hydrogen production process is environment-friendly technology, and can be expected to take a place of hydrogen production technology.