Gathering together is an effectual way for improving quality and efficiency of the physical and chemical regenerative environmental control and life support system,as a regenerative gathering together technology,solid amine can simultaneously gather carbon dioxide and humidity with mild adsorption and desorption conditions,thus having the potential for miniaturization and low energy consumption,making it very suitable for manned deep space exploration missions.The current domestic and foreign systems cannot achieve perfect heat exchange between adsorption and desorption,resulting in low efficiency and less obvious comprehensive advantages.This study utilized multi-physics simulation methods to optimize system heat transfer,designed a combined control system for carbon dioxide and humidity,and verified various system characteristics such as flow rate and cycle time.The results show that:The designed porous thermal conductive medium can effectively reduce thermal resistance,and the obtained optimal filling ratio and structural size improve the heat transfer efficiency of the system.By adjusting the system characteristics,it is possible to dynamically satisfy the carbon dioxide and humidity control needs for 1～3 crews at different metabolic levels.This study verified the advantages of the regenerative combined carbon dioxide and humidity gathering system in terms of weight,power consumption,and volume,and obtained system characteristics,providing important technical support for manned deep space exploration missions.

Objective To prepare the Pt/CeO2/GAC catalyst used to catalyze oxidation of condensate wastewater and to investigate whether the doping of Ce can increase catalytic activity for oxidizing condensate wastewater.Methods Impregnation glycol reduction method was adopted to prepare Pt/CeO2/GAC catalyst,and it was characterized by BET,XPS and XRD.The catalytic activity was determined by batch experiment.Results The experimental results revealed that more than 93.4% of ethanol in the condensate wastewater was oxidized to aldehyde and acetic acid with 13.33 g?L-1 Pt/CeO2/GAC catalyst dose,for 2 h reaction time,at 40 ℃ and normal pressure.In contrast,the oxidation efficiency was only 85.0% with Pt/GAC catalyst without doping Ce in the same reaction condition.Conclusion It is proven that the doping of Ce in Pt/GAC improves the catalytic activity.The characterization of Pt/CeO2/GAC catalyst shows that Ce is presented as Ce4+ that not only increases the content of chemisorbed oxygen on the surface of the catalyst,but also increases the content of Pt greatly.