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Volume 41 Issue 8
Aug.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(8): 1485-1491.
YANG Dongsheng, LIU Meng, PANG Liping, et al. H2O impact on CO2 removal performance of 5A molecular sieve in space station[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(8): 1485-1491. doi: 10.13700/j.bh.1001-5965.2014.0580(in Chinese)
Citation: YANG Dongsheng, LIU Meng, PANG Liping, et al. H2O impact on CO2 removal performance of 5A molecular sieve in space station[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(8): 1485-1491. doi: 10.13700/j.bh.1001-5965.2014.0580(in Chinese)
shu

H2O impact on CO2 removal performance of 5A molecular sieve in space station

doi: 10.13700/j.bh.1001-5965.2014.0580
  • 1.

    School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • 2. National Key Laboratory of Human Factors, China Astronaut Research and Training Center, Beijing 100094, China

  • Received Date: 22 Sep 2014
  • Publish Date: 20 Aug 2015
    Abstract
  • For the further research on reliability and robustness of molecular sieve CO2 removal system applied to the space station, the problem of the humidity failure protection of 4-bed molecular sieves (4-BMS) system in the space station was proposed and studied. The experiment was set up to test the impact of the CO2 absorbing capacity under different relative humidity of gas in two kinds of molecular sieves (TC-5A and PSA-5A) for crewed space mission. Meanwhile, it compared the effect of CO2 adsorption when CO2 concentration of inlet gas, particles and temperature changed under the definite humidity, and explored the competitive adsorption between CO2 and H2O in TC-5A and PSA-5A using different measures. Results show that the PSA-5A has a better performance on CO2 adsorption, but slightly less than TC-5A on H2O adsorption capacity. And presence of H2O in the air had a great influence on molecular sieve adsorption of CO2, when the relative humidity reached the 60%, the molecular sieve has basically lose the CO2 adsorption capacity. Besides, the TC-5A and the PSA-5A CO2 adsorption capacity drop significantly when the temperature rises, but has a relatively less impact on H2O adsorption, especially when RH is high. The experimental study can play a guiding role in evaluation of system reliability and robustness for the long-term orbiting space station study.

     

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