Development and Performance of Microlith™ Light-Off Preconverters for LEV/ULEV

Roychoudhury, Subir; Muench, George; Bianchi, J. F.; Pfefferle, William C.; Gonzales, Frank

doi:10.4271/971023

Cited by 21 publications

(2 citation statements)

References 9 publications

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“…The effectiveness of the Microlith technology and long-term durability of PCI's proprietary catalyst coatings have been systematically demonstrated in different applications. These include exhaust aftertreatment, 16 trace contaminant control, 17,18 catalytic combustion, 19 partial oxidation of methane, 20,21 liquid fuel reforming, 22,23 CO preferential oxidation, and water gas shift reactors. 24 A scanning electron microscopy (SEM) micrograph of the coated Microlith substrate is shown in Fig.…”

Section: Microlith ® Catalytic Technologymentioning

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

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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

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Section: Microlith ® Catalytic Technologymentioning

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

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“…Most catalysts contain active phases, promoters, and a support. Precious metals or alloys are commonly used as active phases in reforming catalysts (5)(6)(7)(8)(9)(10)(11). Ni based catalysts require a high operating temperature and minor precious metal phases to mitigate sever coking problem (11).…”

Section: Introductionmentioning

confidence: 99%

Development and Study of Self-Sustained Electrochemical Promotion Catalysts for Hydrocarbon Reforming

et al. 2013

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A series of study on self-sustained electrochemical promotion (SSEP) catalysts are summarized. The SSEP catalyst enables more than 90% conversion and 90% hydrogen sensitivity at temperatures of 450 -650 ºC for methane and n-pentadecane reforming. The conversion and sensitivity is up to two orders of magnitude greater than those over Ni based catalyst and a commercial Pt catalyst at 450-550°C. The kinetic models incorporating LangmuirHinshelwood model and SSEP effect successfully describe the major characteristics of hydrocarbons reforming over the SSEP catalyst. This concept of SSEP catalyst may provide a new route for developing high performance catalysts for hydrocarbons reforming.

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Novel catalytic reactor for oxidative reforming of methanol

Lyubovsky

Roychoudhury

2004

Applied Catalysis B: Environmental

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Development and Performance of Microlith™ Light-Off Preconverters for LEV/ULEV

Cited by 21 publications

References 9 publications

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

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

Development and Study of Self-Sustained Electrochemical Promotion Catalysts for Hydrocarbon Reforming

Novel catalytic reactor for oxidative reforming of methanol

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