A Study On The Hydrogen Production From Biomass Pyrolysis

According to china's energy utilization and based on the technology of hydrogenproduction from biomass both abroad and at home. The importance and practical significanceof the studies on the release of hydrogen from biomass pyrolysis were pointed out. In order todetermine the influence of the factors (the temperature, reaction time, pellet granularity,biomass material, ratio of steam and biomass (S/B) and so on) on the hydrogen release, themajor works were summarized as follows: First, the process of hydrogen production from biomass pyrolysis was studied in detail.The thermogrametric analysis of the three biomass materials (rice husk, peanut shell andwood waster) was conducted. The reaction behaviors of the different materials under thesame condition in the hydrogen release process were explored. The pyrolysis mechanism ofthe hydrogen release was comprehensive analyzed. Those would be the theory foundation forthe further study of the release of hydrogen production from the biomass pyrolysis. Based on the above research and our experiment purpose, a so-called "tube furnacepyrolyzer" was designed for the experiments. The hydrogen production experiments wereconducted in the tube furnace pyrolyzer through controling the parameters such as thetemperature, reaction time, pellet granularity, biomass material, S/B and so on, which selectrice husk ,rice stalk powder,peanut shell powder,sawdust as feedstock.Finally, the influences of the parameters on the behavior of the hydrogen release frombiomass pyrolysis were studied. The result shows that: the temperature is the primary factorthat influences the hydrogen release, and the hydrogen content obviously rises along with theenhancing of the pyrolysis temperature and the reaction time until the end of the reaction. Atthe temperature of 750℃ and the reaction time of 12 minutes, if S/B is less than 0.48, thehydrogen content increases along with the increases of the S/B, while the hydrogen contentdecreases slowly if it is over 0.48. These important conclusions and basic rules that obtainedunder the different pyrolysis conditions would provide as the reference for the further studyof technology of hydrogen production from biomass by thermochemistry conversion.