Study On Combustible Gas Production From Biomass Catalytic Pyrolysis

With the more demand for energy and the less fossil fuel,to find a new continuable energy is to be an urgency mission for us in near future.Biomass energy as a renewable energy has been paid more attention in the countries all over the world,and how to study, exploit and utilize it has become an important task,too.Biomass pyrolysis/catalytic pyrolysis is one of the promising technologies converting biomass to bioenergy.Pyrolysis and Catalytic pyrolysis experiments,using micron pine sawdust as test materials,were performed in a fixed-bed with nickel-based catalysts prepared by ourselves, and the products and its components were analyzed.The influences of parameters such as catalysts,temperature and steam on experiment were also discussed.The results showed that the catalytic pyrolysis with nickel-based catalyst,which is superior to dolomite, promoted significantly the cracking of tar in gas and improved effectively the quality and yield of product gas.The yields of tar and char decreased while that of gas increased markedly,and content of CO and H₂ in gas also enhanced as the increasing temperature, which is helpful for producing more combustible gas.At the same time,the contents of tar and coke lessened while that of H₂ and the quantity of gas enhanced prominently with vopour in catalyst pyrolysis.Meanwhile,this dissertation studied on characteristic of residual carbon after steam activation derived from biomass pyrolysis and its adsorption performance on copper ion in waste water.The effect of adsorption time,particle size and solution pH on adsorption of copper ion were discussed.The results indicated that the optimal adsorption condition was as follows:particle size 0.3-0.45mm,adsorption time 120min,pH6.2.The corresponding adsorption efficiency was above 85%.