An Experimental Study of the Bosch and the Sabatier CO<sub>2</sub> Reduction Processes

Otsuji, K.; Hanabusa, O.; Sawada, Tadashi; Satoh, S.; Matsushima, Masaki

doi:10.4271/871517

Cited by 12 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(4)). The conflicting demands of temperature and space velocity for these reactions make single-stage Bosch reactor optimization highly complicated and less favorable as was suggested by Otsuji et al, 10 and Abney et al, 11,12 among others. Thus, a potential improvement to the process is to split the Bosch chemistry into a series reactor T configuration.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Staged Bosch Process for CO2 Reduction to Produce Life Support Consumables

Vilekar

Hawley

Junaedi

et al. 2012

42nd International Conference on Environmental Systems

View full text Add to dashboard Cite

Utilizing carbon dioxide to produce water and hence oxygen is critical for sustained manned missions in space, and to support both NASA's cabin Atmosphere Revitalization System (ARS) and In-Situ Resource Utilization (ISRU) concepts. For long term missions beyond low Earth orbit, where resupply is significantly more difficult and costly, open loop ARS, like Sabatier, consume inputs such as hydrogen. The Bosch process, on the other hand, has the potential to achieve complete loop closure and is hence a preferred choice. However, current single stage Bosch reactor designs suffer from a large recycle penalty due to slow reaction rates and the inherent limitation in approaching thermodynamic equilibrium. Developmental efforts are seeking to improve upon the efficiency (hence reducing the recycle penalty) of current single stage Bosch reactors which employ traditional steel wool catalysts. Precision Combustion, Inc. (PCI), with support from NASA, has investigated the potential for utilizing catalysts supported over short-contact time Microlith substrates for the Bosch reaction to achieve faster reaction rates, higher conversions, and a reduced recycle flows. Proof-of-concept testing was accomplished for a staged Bosch process by splitting the chemistry in two separate reactors, first being the reverse water-gas-shift (RWGS) and the second being the carbon formation reactor (CFR) via hydrogenation and/or Boudouard. This paper presents the results from this feasibility study at various operating conditions. Additionally, results from two 70 hour durability tests for the RWGS reactor are discussed. Nomenclature °C= degree Celsius cm = centimeter d = diameter ft = foot g-cat = gram of metal catalyst GSA = geometric surface area hr = hour in = inch kJ = kilojoules L = liter m = meter ml = milliliter

show abstract

Section: Introductionmentioning

confidence: 99%