Development status of a Low-Power CO2 Removal and Compression System for Closed-Loop Air Revitalization

Varghese, Mini; Mulloth, Lila; Luna, Bernadette; Hogan, John A.

doi:10.2514/6.2010-6060

Cited by 5 publications

(4 citation statements)

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“…Although the CDRA is capable of lowering the concentration of the harmful gas to c.a. 5300 ppm (12,13), clinical studies suggest that the spacecraft maximum allowable concentration (SMAC) of CO 2 should be reduced to 2500 ppm or lower, as for future long-duration (>1000 days) space missions current SMACs may still present undesired physiological effects in the crew (14,15).…”

Section: Removal Of Carbonmentioning

confidence: 99%

“…Specifically, breakthrough curves for CO 2 in dry nitrogen (synthetic air) at concentrations of c.a. 5300 and 2500 ppm are presented since those are the working parameters of the CDRA unit (12) and the under-development Low Power CO 2 Removal (LPCOR) system, respectively (13,24). CO 2 concentrations of 1000 ppm were also tested since it is in the low partial pressures that the Sr 2+ -SAPO-34 was shown to be significantly superior to the currently used 5A Zeolite.…”

Section: Removal Of Carbonmentioning

confidence: 99%

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Removal of Carbon Dioxide from Light Gas Mixtures using a Porous Strontium(II) Silicoaluminophosphate Fixed Bed: Closed Volume and Portable Applications

García-Ricard

Arévalo-Hidalgo

et al. 2014

Separation Science and Technology

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A Sr 2+ -SAPO-34 bed was assembled to study CO 2 dynamic adsorption under conditions that emulate those found in closed volume and portable applications. Although the surface area was reduced by 7% during pelletization, adsorption capacities estimated from breakthrough curves compared well with static volumetric adsorption data. Modeling of the breakthrough adsorption was achieved using a Linear Driving Force mass transfer rate model, showing good agreement with the experimental data and confirming fast kinetics and efficient use of the bed. Fast kinetics were also evidenced by the length of the unused section of the bed as calculated from a Mass Transfer Zone model. Adsorption capacity degradation was not observed after multiple regeneration cycles. Apparent and equilibrium adsorption isotherm data estimated from the bed and static volumetric experiments at 25 C were compared to that of 5A Zeolite. These showed that Sr 2+ -SAPO-34 is a superior adsorbent for CO 2 removal in the low partial pressure range (<1500 ppm). CO 2 and H 2 O multicomponent adsorption breakthrough curves were also gathered for a CO 2 inlet concentration of 1000 ppm and dew points of −5 and 8 C. The addition of moisture resulted in a decrease in total processed gas volume by 31 and 47%, respectively.

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Section: Removal Of Carbonmentioning

confidence: 99%

Section: Removal Of Carbonmentioning

confidence: 99%

Removal of Carbon Dioxide from Light Gas Mixtures using a Porous Strontium(II) Silicoaluminophosphate Fixed Bed: Closed Volume and Portable Applications

García-Ricard

Arévalo-Hidalgo

et al. 2014

Separation Science and Technology

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“…The only removal of CO2 at extremely dilute conditions has been already shown elsewhere as being viable for many adsorption materials [22][23][24][25][26]. CO2 removal technologies such as the air revitalization system in the International Space Station [27] or CO2 separation in commercial cryogenic air separation units [28] have worked for years. The real technological challenge is not to separate CO2 from air but concentrate and compress that amount of CO2 at the specifications dictated by long term geological storage [13].…”

Section: Introductionmentioning

confidence: 99%

Adsorption artificial tree for atmospheric carbon dioxide capture, purification and compression

Santori

Charalambous

Ferrari

et al. 2018

Energy

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The current concentration of carbon dioxide in the atmosphere demands for development of negative emission solutions such as direct carbon dioxide removal from the atmosphere (air capture). Many well-established processes can remove carbon dioxide from the atmosphere but the real technological challenge consists of concentrating and compressing carbon dioxide at the conditions for long term geological storage, with efficient use of non-fossil energy sources. A thermally-driven, negative-carbon adsorption process for capture, purification and compression of carbon dioxide from air is proposed. The process is based on a series of batch adsorption compressors of decreasing size to deliver a compressed carbon dioxide stream to a final storage. Thermodynamic analysis of the process shows that, by exploiting the equilibrium properties of commercial and non-commercial materials, carbon dioxide can be produced at specifications appropriate for geological storage. By operating the process with zeolite 13X at regeneration temperature of 95°C, a final storage vessel can be pressurized with carbon dioxide at purities >0.95 mole fraction and specific energy consumption <2.2 MJth molCO2-1. Tailored materials provide a step-change in performance. When the process operates with zeolite NaETS-4, carbon dioxide can be purified at values >0.97 mole fraction.

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“…Low power CO 2 removal (LPCOR) and engineered structured sorbent (ESS) concepts that may be more energy efficient than traditional packed sorbent beds have been under development for several years. 20,21 Elements of the LPCOR and ESS concepts may be suitable for upgrading the ISS CDRA process architecture for exploration vehicle and habitat applications. The AES ARREM Project intends to investigate such an architecture in detail.…”

Section: B Cabin Atmosphere Conditioning Equipment 1 Carbon Dioxidementioning

confidence: 99%

Integrated Atmosphere Resource Recovery and Environmental Monitoring Technology Demonstration for Deep Space Exploration

Perry

Abney

Knox

et al. 2012

42nd International Conference on Environmental Systems

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Development status of a Low-Power CO2 Removal and Compression System for Closed-Loop Air Revitalization

Cited by 5 publications

References 0 publications

Removal of Carbon Dioxide from Light Gas Mixtures using a Porous Strontium(II) Silicoaluminophosphate Fixed Bed: Closed Volume and Portable Applications

Removal of Carbon Dioxide from Light Gas Mixtures using a Porous Strontium(II) Silicoaluminophosphate Fixed Bed: Closed Volume and Portable Applications

Adsorption artificial tree for atmospheric carbon dioxide capture, purification and compression

Integrated Atmosphere Resource Recovery and Environmental Monitoring Technology Demonstration for Deep Space Exploration

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