Study On Characteristics Of Biomass Chemical Looping Gasification Using Potassium-containing Organic Wastewater

The continuous development of industry has produced a large amount of industrial wastewater,and the large use of fossil fuels has led to the depletion of resources.Therefore,it is necessary to develop efficient new technologies for clean energy and environmental restoration to solve the current problems.Hydrogen energy acts a clean energy,and biomass as raw material for chemical looping hydrogen production has the advantages of energy saving and environmental protection,but the fixed carbon conversion rate is not high in this process.The use of waste liquid to drive the chemical looping gasification of biomass can use water vapor to convert fixed carbon while treating wastewater.In order to realize organic combination of clean energy production and environmental restoration,with improving the efficiency biomass gasification,this paper proposes a study on the chemical looping gasification of biomass containing potassium-containing organic waste liquid.On the one hand,it can realize the resource utilization of waste liquid.On the other hand,waste liquid can provide gasification agent for gasification of biomass chemical looping.In this study,the Fe2O3/Al2O3 oxygen carrier prepared by the impregnation method were synthesized to be used in this paper to conduct experiments using K2CO3/ethanol and KNO3/acetic acid waste liquid,and optimal conditions for hydrogen production were studies in terms of produced syngas distribution.Results found that 800℃,6%K2CO3 and the peroxidation coefficient of 0.2 is the best working condition for the carbonate-ethanol-containing waste liquid-biomass chemical looping gasification experiment,and compared with non-wastewater biomass CLG,the result showed that the carbon conversion rate,gas production and synthesis gas quality in the waste-driven experiment were better than those without the waste liquid driving.For the liquid nitrogen gasification experiment containing potassium nitrate acetate-biomass,750℃,8%KNO3,and a peroxidation coefficient of 0.2 are the best conditions.Moreover,thermodynamic analysis shows that under this condition,the autothermal cycle is exothermic,indicating that it is feasible to use biomass to drive biomass chemical looping gasification,which shows a double advantage of waste solution treatment and energy conversion.