Complete and partial catalytic oxidation of methane over substrates with enhanced transport properties

Lyubovsky, Maxim; Karim, Hasan; Menacherry, Paul; Boorse, Sam; LaPierre, Rene B.; Pfefferle, William C.; Roychoudhury, Subir

doi:10.1016/s0920-5861(03)00231-1

Cited by 72 publications

(30 citation statements)

References 14 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, 17 trace contaminant control, 18,19 catalytic combustion, 20 partial oxidation of methane, 12,21 liquid fuel reforming, 13 CO preferential oxidation, and water gas shift reactors. 22 A scanning electron microscopy (SEM) micrograph of the coated Microlith substrate is shown in Fig.…”

Section: Microlith ® Catalytic Technologymentioning

confidence: 99%

“…In general, the high surface area per volume of the catalytic Microlith substrates is expected to help with the kinetically-controlled reaction, the short channel length of Microlith substrates is expected to aid the mass transfer controlled reaction, and the metallic support should improve conductive heat transfer to avoid local hot spots and increase durability to withstand mechanical and thermal shocks. 12,13 …”

Section: Introductionmentioning

confidence: 99%

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Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Junaedi

Hawley

Walsh

et al. 2011

41st International Conference on Environmental Systems

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Section: Microlith ® Catalytic Technologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Junaedi

Hawley

Walsh

et al. 2011

41st International Conference on Environmental Systems

Self Cite

View full text Add to dashboard Cite

“…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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“…The effectiveness of the Microlith technology and long-term durability of PCI's proprietary zeolite and catalyst coatings have been systematically demonstrated in different applications. These include exhaust aftertreatment, 5 trace contaminant control, 6-9 adsorption of TICs and sulfur, 10 catalytic combustion, 11 partial oxidation of methane, 12,13 liquid fuel reforming, 14 CO preferential oxidation, and water-gas shift reactors. 15 A scanning electron microscopy (SEM) micrograph of the coated Microlith substrate is shown in Fig.…”

Section: Microlith Substrate Technologymentioning

confidence: 99%

Microlith-based Structured Sorbent for Carbon Dioxide, Humidity, and Trace Contaminant Control in Manned Space Habitats

Junaedi

Roychoudhury

Howard³

et al. 2011

41st International Conference on Environmental Systems

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To support continued manned space exploration, the development of atmosphere revitalization systems that are lightweight, compact, durable, and power efficient is a key challenge. The systems should be adaptable for use in a variety of habitats and should offer operational functionality to either expel removed constituents or capture them for closedloop recovery. As mission durations increase and exploration goals reach beyond low earth orbit, the need for regenerable adsorption processes for continuous removal of CO 2 and trace contaminants from cabin air becomes critical. Precision Combustion, Inc. (PCI) and NASA -Marshall (MSFC) have been developing an Engineered Structured Sorbents (ESS) approach based on PCI's patented Microlith ® technology to meet the requirements of future, extended human spaceflight explorations. This technology offers the inherent performance and safety attributes of zeolite and other sorbents with greater structural integrity, regenerability, and process control, thereby providing potential durability and efficiency improvements over current state-of-the-art systems. The major advantages of the ESS explored in this study are realized through the use of metal substrates to provide structural integrity (i.e., less partition of sorbents) and enhanced thermal control during the sorption process. The Microlith technology also offers a unique internal resistive heating capability that shows potential for short regeneration time and reduced power requirement compared to conventional systems. This paper presents the design, development, and performance results of the integrated adsorber modules for removing CO 2 , water vapor, and trace chemical contaminants. A related effort that utilizes the adsorber modules for sorption of toxic industrial chemicals is also discussed. Finally, the development of a 4-person two-leg ESS system for continuous CO 2 removal is also presented. Nomenclature

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Complete and partial catalytic oxidation of methane over substrates with enhanced transport properties

Cited by 72 publications

References 14 publications

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

Compact and Lightweight Sabatier Reactor for Carbon Dioxide Reduction

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

Microlith-based Structured Sorbent for Carbon Dioxide, Humidity, and Trace Contaminant Control in Manned Space Habitats

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