The increased concentration of CO_(2) due to continuous breathing and no discharge of human beings in the manned closed space,like spacecraft and submarines,can be a threat to health and safety.Effective removal of lo...The increased concentration of CO_(2) due to continuous breathing and no discharge of human beings in the manned closed space,like spacecraft and submarines,can be a threat to health and safety.Effective removal of low concentration CO_(2) from the manned closed space is essential to meet the requirements of long-term space or deep-sea exploration,which is an international frontier and trend.Ionic liquids(ILs),as a widespread and green solvent,already showed its excellent performance on CO_(2) capture and absorption,indicating its potential application in low concentration CO_(2) capture.In this review,we first summarized the current methods and strategies for direct capture from low concentration CO_(2) in both the atmosphere and manned closed spaces.Then,the multi-scale simulation methods of CO_(2) capture by ionic liquids are described in detail,including screening ionic liquids by COSMO-RS methods,capture mechanism by density functional theory and molecular dynamics simulation,and absorption process by computational fluid dynamics simulation.Lastly,some typical IL-based green technologies for low concentration CO_(2) capture,such as functionalized ILs,co-solvent systems with ILs,and supported materials based on ILs,are introduced,and analyzed the subtle possibility in manned closed spaces.Finally,we look forward to the technology and development of low concentration CO_(2) capture,which can meet the needs of human survival in closed space and proposed that supported materials with ionic liquids have great advantages and infinite possibilities in the vital area.展开更多
In this work,nitric oxide absorption process by using ferrate(Ⅵ)/urea was proposed.The respective influences of the four factors including pH value,ferrate(Ⅵ) concentration,urea concentration,and the temperature and...In this work,nitric oxide absorption process by using ferrate(Ⅵ)/urea was proposed.The respective influences of the four factors including pH value,ferrate(Ⅵ) concentration,urea concentration,and the temperature and the interactive function of them on nitric oxide absorption were investigated with the response surface methodology(RSM) by central composite design(CCD).The proposed model system showed good consistency with the experiment results,by a correlated coefficient(R^(2)) of 0.9875.In addition,the interactive influences between any two variables were elaborated through analysis of response surface.The optimal parameters were found at pH of 7.1,reaction temperature of 43.8C,urea concentration of 6.3 wt%,ferrate(Ⅵ) concentration of 4.4 mmol/L for 85.2% NO absorption.Finally,Ncontaining product analysis shows that nitric oxide was primarily transformed to N2 and NO_(3)^(-).展开更多
基金supported by the National Natural Science Foundation of China(21878295,22078024)the Natural Science Foundation of Beijing(2192052)the Project funded by Liaoning Provincial Department of Education(LQ2020001)。
文摘The increased concentration of CO_(2) due to continuous breathing and no discharge of human beings in the manned closed space,like spacecraft and submarines,can be a threat to health and safety.Effective removal of low concentration CO_(2) from the manned closed space is essential to meet the requirements of long-term space or deep-sea exploration,which is an international frontier and trend.Ionic liquids(ILs),as a widespread and green solvent,already showed its excellent performance on CO_(2) capture and absorption,indicating its potential application in low concentration CO_(2) capture.In this review,we first summarized the current methods and strategies for direct capture from low concentration CO_(2) in both the atmosphere and manned closed spaces.Then,the multi-scale simulation methods of CO_(2) capture by ionic liquids are described in detail,including screening ionic liquids by COSMO-RS methods,capture mechanism by density functional theory and molecular dynamics simulation,and absorption process by computational fluid dynamics simulation.Lastly,some typical IL-based green technologies for low concentration CO_(2) capture,such as functionalized ILs,co-solvent systems with ILs,and supported materials based on ILs,are introduced,and analyzed the subtle possibility in manned closed spaces.Finally,we look forward to the technology and development of low concentration CO_(2) capture,which can meet the needs of human survival in closed space and proposed that supported materials with ionic liquids have great advantages and infinite possibilities in the vital area.
基金supported by the National Natural Science Foundation of China (Nos.21808031 and 11905029)。
文摘In this work,nitric oxide absorption process by using ferrate(Ⅵ)/urea was proposed.The respective influences of the four factors including pH value,ferrate(Ⅵ) concentration,urea concentration,and the temperature and the interactive function of them on nitric oxide absorption were investigated with the response surface methodology(RSM) by central composite design(CCD).The proposed model system showed good consistency with the experiment results,by a correlated coefficient(R^(2)) of 0.9875.In addition,the interactive influences between any two variables were elaborated through analysis of response surface.The optimal parameters were found at pH of 7.1,reaction temperature of 43.8C,urea concentration of 6.3 wt%,ferrate(Ⅵ) concentration of 4.4 mmol/L for 85.2% NO absorption.Finally,Ncontaining product analysis shows that nitric oxide was primarily transformed to N2 and NO_(3)^(-).
