Experiment And Mechanism Analysis Of Hydrogen Production By Biomass Pyrolysis

As the situation of fossil fuels consumption and environmental pollution becomesmore and more severe, it’s a focus to find the new energy in every area. Hydrogen isconsidered as the potential and clean energy in the21st century, and also a newalternative energy of fossil fuels. The technology of hydrogen production is one of thekeys of hydrogen energy development. In this paper, a new route of biomass pyrolysisfor hydrogen-rich gas production was proposed, in which molten alkali adopted ascatalyst, dispersant and heat carrier during the pyrolysis of biomass.Before experiment, rice straw was pretreated by water, acid, alkali. In paper, thebasic nature of the pretreated feedstock was anlysised separately, including:determination contents of cellulose, hemicellulose and lignin by chemical analysis;contents of water, ash, etc were measured by elementary analysis and proximateanalysis.The pyrolysis process of biomass was carried out by thermogravimetry（TG）. Theexperiment investigated effect of the pyrolysis process, including composition ofinorganic alkali, various Ni-containing additives, the content of NiCl2, and differentbiomass materials.Experiment on the pyrolysis of pretreated rice straw in hydroxide molten alkali hasbeen carried out in a reactor under nitrogen atmosphere and atmospheric pressure.Based on the experiment setup and technics, a product analysis method was formed,especially quantitative analysis of gas product. Experiment analysised gaseous, liquidand solid product distribution，and the content of water of bio-oil before and afterwashing, acid and alkali pretreatment. The H2yield is58.93g/kg biomass after3wt%H2SO4pretreatment. Biomass pyrolysis generates CO, CO₂in the existence ofnon-molten alkali. According to effects of reaction, the study of molten NaOH react with CO, CO₂respectively and the mechanism of pyrolysis of biomass in moltenalkali was investigated.