Characteristics construction of biomass porous carbon and feasibility analysis of N2O adsorption
This article aimed at the current situation and causes of N2O emission,the research on the application of N2O emission purification on the biochar from agricultural soil were summarized,and the crucial role of physicochemical properties of biomass porous carbon on N2O adsorption was further analyzed.Importantly,the effects of different preparation conditions on the physicochemical properties of biomass porous carbon were emphatically discussed.Among them,the microporous structure was easily formed by using biomass raw materials with greater lignin content during the high temperature pyrolysis.Under different temperatures(400 ℃-1000 ℃)and biomass precursors,the specific surface area and the micropore volume of porous carbon were maximally achieved to 2979m2/g and 1.130cm3/g,respectively.In addition,the chemical properties of biomass porous carbon,such as surface polarity,acid-base properties,hydrophilicity and hydrophobicity,were modified via the method of activator and heteroatom doping,and then the surface functional groups were also increased,thereby improving the adsorption capacity of biomass porous carbon by the enhancement of chemical adsorption.Furthermore,according to the characteristics of biomass porous carbon,the feasibility of N2O adsorption and enrichment was further illustrated from three aspects,such as adsorption capacity,renewability and selectivity.It provides a scientific basis for the application of N2O adsorption by biomass porous carbon.
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