Study On Secondary Gasphase Reaction Of Biomass Catalytic Pyrolysis

The yield and distribution of products from secondary gas phase reaction were investigated with plant biomass in low temperature catalytic pyrolysis way, involving kinetics equation and fluidized technology. The paper make a progress and a reference in disposing and regenerating solid waste, and make a positive significance in utilizing biomass energy sources and protecting environment.In order that researching deeply catalytic pyrolysis characteristic of biomass at low temperature and normal pressure and ordering more reference data, catalytic pyrolysis of biomass was investigated with a powder particle fluidized bed (PPFB). The kinetics model was built by carrying out the TA experiment. Further more, the effect of different kinds of catalyst, operational conditions and kinds of biomass on the yields and distributions of products were examined. Meanwhile, the effect of reactivation of catalyst on the yields and distributions of products was investigated.The results were as follows:With largening the rate of increasing temperature, all the curses of weight loss moved towards high temperature. The most rate of weight loss of pine was higher cotton stalk; it is the same as the temperature which the most rate of weight lass correspond to. The pyrolysis of pine was comparatively stable. The straw produced more IOG and HCG than the wood. In contrast to NiMo-A, the yield the benzene was larger with CoMo-A. CoMo-A and NiMo-A affected further the HCG yield from pine; rice hunk, however, was almost unaffected. The yields of HCL from pine was almost the same with γ-Al2O3、NiMo-A、CoMo-A. There was the most yield of BTXN from rice hunk with CoMo-A. Increasing temperature affect further the yields of H2and HCG from rice hunk than pine. The yield of HCL with CoMo-A at863Kwas6.3wt%,daf, which was twice as much as the yield of HCL with SiO2. The pyrolysis temperature with CoMo-A lowered by310K in contrast with SiO2. With reactivating times of CoMo-A, the yield of H2and IOG trended decreasingly, which indicated that catalyst was partially deactivated.