生物质添加对脱油沥青气化的影响及动力学研究OA北大核心CSTPCD

Using gasification technology to convert the deoiled asphalt into synthesis gas is an environmentally friendly and efficient method to enhance its added value.However,the gas-ification reaction activity of deoiled asphalt is low,and the amount of carbon black generated dur-ing gasification is large.The alkali metal elements in biomass can effectively catalyze the gasifica-tion reaction of fossil fuels.Therefore,co-gasification of straw(RS)and deoiled asphalt was se-lected to improve its gasification reaction rate.An atmospheric thermogravimetric analyzer(TGA)was employed to investigate the co-gasification reaction characteristics of DOA and RS at different mixing ratios(mDOA∶mRS is 9∶1,8∶2,7∶3,1∶1,3∶7 respectively).The results were then compared with those obtained when only DOA was used.Scanning electron microscopy with energy-dispersive X-ray spectroscopy(SEM-EDS)was used to characterize the microstruc-ture and elemental distribution of co-gasification products,and the Coats-Redfern method was se-lected in conjunction with Malek's most probable mechanism function to calculate the co-gasifica-tion kinetic parameters and kinetic equations.The results show that RS mainly catalyzes gasifica-tion reactions through potassium elements in the ash.During co-gasification,potassium is trans-ferred from RS to the surface of DOA,and the gasification reaction active sites are increased on the surface of DOA by expanding pores and forming new pores;The synergistic effect of co-gasi-fication is most significant when the mixing ratio of DOA and RS is 3∶7,and the activation ener-gy is reduced by approximately 94.7 kJ/mol compared to DOA gasification alone.