INFLUENCE OF FLUE GAS COMPONENTS ON NO ABSORPTION BY METHYLUREA-BASED DEEP EUTECTIC SOLVENT
Deep eutectic solvents(DESs),as a new kind of green solvent,are non-toxic and harmless,hard to evaporate,and have good thermal stability.Using deep eutectic solvents to soak up toxic gases in flue(especially NO)becomes one of the key lookup contents.In this study,methyl urea(MTU)and acetylcholine chloride(AchCl)were used to prepare a deep eutectic solvent(MTU-AchCl DES)to learn about its NO absorption performance,and impact of DESs'mixing ratio,NO concentration,O2,H2O and carbon dioxide on the absorption performance.The experimental consequences showed that the overall denitrification performance of MTU-AchCl DESs was best when the molar ratio was 1∶2.When there was O2 in the flue gas,the highest absorption capacity of NO by MTU-AchCl DESs was 0.223 g/g.O2 promoted the absorption with the aid of oxidizing NO into NO2.When CO2 was delivered into the flue gas,the absorption of MTU-AchCl DESs on NO had promotion in a certain degree.When H2O was once introduced,the absorption of DESs decreased,and H2O had an inhibitory impact on the absorption of NO in the DESs system.Through FI-IR and Gaussian simulation results,it was discovered that MTU-AchCl DESs and NO were mixed in the structure of nitrogen-oxygen double bond(N=O),nitrogen-oxygen single bond(N—O)and nitrogen-nitrogen single bond(N—N).After the addition of O2,CO2 and H2O,the response enthalpy of the DESs machine changed from-53.334 kJ/mol to-56.212 kJ/mol,-55.423 kJ/mol and-50.982 kJ/mol.The simulation result was further verified that the components of flue gas had different effects on the absorption of NO.
deep eutectic solventflue gas componentsdenitrationmethyl ureaabsorption
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