Development Of Novel CO₂ Adsorbent Materials And Non-thermal Plasma Catalytic Oxidation Of VOCs

The large amount of CO₂ emissions and VOCs pollution have become an severe environmental issue during the social and economic development of China,which has attracted the attention of the government and the public.Reducing CO₂ emissions and controlling VOCs pollution are greatly important requirements for the sustainable development of Chines society.In this work,novel starch-based CO₂ adsorption materials and low-temperature plasma VOCs catalytic oxidation materials with stable and excellent performance were investigated for CO₂ capture and treatment of VOCs pollution.Research works are mainly involved with?1?the preparation of new microporous adsorption materials using starch as carbon source and the study of its adsorption separation of CO₂/N₂;and?2?the development of a new Ag/Mn based catalyst and the study of its performance in degrading toluene in plasma systems,which are great significances of theoretical research and practical application.A starch-based porous carbon material was prepared and characterized.A series of starch-based porous carbon materials were prepared by polymerization,carbonization and activation processes separately using corn starch,potato starch and pea starch as carbon sources,and the materials were characterized.Results showed that the starch-based carbon material has excellent thermal stability.The CSC700-4 material has a specific surface area of1974 m²/g and a pore volume of 0.812 cm³/g.The CSC700-3 exhibited the cumulative volume of the pores with less than 0.8nm reaches 0.343 cm³/g,indicating its developed ultra-microporous structure.The CO₂ adsorption properties of the resulting starch-based carbon materials were studied.The adsorption isotherms of CO₂ and N₂ on the samples were determined by volumetric method.The adsorption heat and CO₂/N₂ adsorption selectivity of the materials were calculated.The results showed that the CO₂ adsorption capacity of the corn starch-based carbon material CSC700-3 was the highest among the samples,reaching 4.32 mmol/g?at298K,1bar?.The IAST predicted CO₂/N₂ selectivity reached 41,comparable to the most carbon materials and MOFs materials.A novel Ag/Mn-based catalyst was prepared by ultrasonic impregnation method.The resultant Ag/Mn-based catalyst exhibited excellent catalytic activity for oxidation of toluene in plasma catalytic oxidation system.Silver and manganese were mainly present on the catalyst in the form of silver element and M⁴⁺.The Ag/Mn-2 material has the highest catalytic activity for oxidation of toluene among the resultant samples,and its toluene degradation efficiency reaches 100%at 35? and energy density of 11.2 J/L.