Low-temperature NO decomposition with high efficiency and low energy consumption remains a huge challenge.Herein,we reported a novel adsorption-microwave catalytic decomposition method for the deep removal of NO using...Low-temperature NO decomposition with high efficiency and low energy consumption remains a huge challenge.Herein,we reported a novel adsorption-microwave catalytic decomposition method for the deep removal of NO using NaY-MgCo_(2)O_(4)-40%BaCO_(3) as the bi-functional adsorbent/catalyst material under complex flue gas.At room temperature,under the condition of excess O_(2),NO was first adsorbed on the bi-functional material for concentration,and then the adsorbed NO was quickly decomposed into N_(2) and O_(2)by microwave(MW)catalysis at a low temperature of 250℃.It was found that the conversion of adsorbed NO reached 99.5%after only 15 min of microwave irradiation.NaY-MgCo_(2)O_(4)-40%BaCO_(3) had excellent recyclability with a high NO removal rate of 98.2%in the 4-cycles’operation.Moreover,the application of the adsorption-microwave catalytic decomposition method for denitrification under complex flue gas(the presence of SO_(2)or CO_(2))was studied for the first time,and NaY-MgCo_(2)O_(4)-40%BaCO_(3) showed superior resistance to SO_(2)and CO_(2).This work provides a new and attractive approach for the deep removal of NOx at low temperature without adding an additional reducing agent,and it is green,efficient and energy-saving.展开更多
基金supported by the National Natural Science Foundation of China(No.22178295,21706225,21676227)the Research Foundation of Hunan Provincial Education Department(No.19B540)+2 种基金the Natural Science Foundation of Hunan Province(No.2020JJ4572,2021JJ30665)the Research Foundation of Zhongye Changtian International Engineering Co.,Ltd(No.2020JCYJ02)the Hunan Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization.
文摘Low-temperature NO decomposition with high efficiency and low energy consumption remains a huge challenge.Herein,we reported a novel adsorption-microwave catalytic decomposition method for the deep removal of NO using NaY-MgCo_(2)O_(4)-40%BaCO_(3) as the bi-functional adsorbent/catalyst material under complex flue gas.At room temperature,under the condition of excess O_(2),NO was first adsorbed on the bi-functional material for concentration,and then the adsorbed NO was quickly decomposed into N_(2) and O_(2)by microwave(MW)catalysis at a low temperature of 250℃.It was found that the conversion of adsorbed NO reached 99.5%after only 15 min of microwave irradiation.NaY-MgCo_(2)O_(4)-40%BaCO_(3) had excellent recyclability with a high NO removal rate of 98.2%in the 4-cycles’operation.Moreover,the application of the adsorption-microwave catalytic decomposition method for denitrification under complex flue gas(the presence of SO_(2)or CO_(2))was studied for the first time,and NaY-MgCo_(2)O_(4)-40%BaCO_(3) showed superior resistance to SO_(2)and CO_(2).This work provides a new and attractive approach for the deep removal of NOx at low temperature without adding an additional reducing agent,and it is green,efficient and energy-saving.
