title: [C2H4 reducing facility for controlled ecological life support system].
abstract: OBJECTIVE
  To develop an experimental facility for reducing C2H4 produced by plants' growing in the controlled ecological life support system (CELSS).
  
  
  METHODS
  Based on technical parameters and performance requirements, project planning, design drawing, fabrication, and debug were conducted. Then, an experimental test for reducing C2H4 was done by measuring the content of C2H4 in gases between the inlet and the outlet of the facility. Its C2H4 decomposing capacity was evaluated.
  
  
  RESULTS
  The facility worked well, and the parameters, such as energy consumption, and volume, met the design requirements. The experimental test results demonstrated that the content of C2H4 was reduced from 0.034 mg/kg to below 0.010 mg/kg, under the condition that the relative humidity and velocity of flow of the inlet-gas was 20% and 1.0-3.0 L/min respectively, and power of the lamp was 48 W. Considering the composition and the content of the gas in the outlet of the facility, there was no harmful product to the plants, except CO2 and H2O.
  
  
  CONCLUSIONS
  The facility has reasonable technical indices, and smooth and dependable performances. It can be used as a facility for decomposing C2H4 in plants growing system in CELSS.
authors.affiliation: Institute of Space Medico-Engineering, Beijing, China. aiweidang@126.com
authors.forename: Wei-dang
authors.initials: WD
authors.lastname: Ai
authors.forename: Shuang-sheng
authors.initials: SS
authors.lastname: Guo
authors.forename: Xiang-yang
authors.initials: XY
authors.lastname: Liu
authors.forename: Wen-hua
authors.initials: WH
authors.lastname: Leng
mesh_terms: D000389:Air Conditioning / Q000295:instrumentation / Q000379:methods*; D000393:Air Pollutants / Q000737:chemistry; D016902:Air Pollution, Indoor / Q000517:prevention & control; D002384:Catalysis; D018504:Ecological Systems, Closed; D005030:Ethylenes / Q000096:biosynthesis / Q000737:chemistry*; D005069:Evaluation Studies as Topic; D006813:Humidity; D008021:Life Support Systems / Q000295:instrumentation*; D010777:Photochemistry; D063245:Plant Development; D010937:Plant Growth Regulators / Q000096:biosynthesis / Q000737:chemistry*; D010944:Plants / Q000378:metabolism
chemical_list: D000393:Air Pollutants; D005030:Ethylenes; D010937:Plant Growth Regulators; C036216:ethylene