Comparison of Catalyst Support Between Monolith and Pellet in Hydrogen Peroxide Thrusters

An, Sungyong; Lee, Jeongsub; Brahmi, Rachid; Kappenstein, Charles; Kwon, Sejin

doi:10.2514/1.46075

Cited by 35 publications

(7 citation statements)

References 11 publications

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“…Monolithic catalysts have become the most diffuse and economically significant application of catalytic reaction engineering and industrial catalysis so far [161]. This is due to the commercial success of such well-known environmental catalysis processes as: (i) the purification of exhaust gases from automobiles [162,163], (ii) the abatement of NO x emitted in the stack gases from power stations by selective catalytic reduction processes [162,164], (iii) the catalytic combustion of VOCs [165,166] and space propulsion [167]. Their potential for application in heterogeneous catalysis has also been widely investigated, as reviewed by Cybulski and Moulijn [168].…”

Section: Structured Catalystsmentioning

confidence: 99%

Catalysis in VOC Abatement

et al. 2011

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Volatile organic compounds (VOCs) are harmful to environment and human health. Catalytic oxidation has been used in VOC abatement for over 60 years, and it has proven to be an effective technology. A large variety of VOCs set high demands for the treatment, and therefore catalytic oxidation needs still to be developed further. This paper reviews current aspects and future research needs related to VOCs and catalytic VOC treatment concentrating on solvent-based, chlorinated and sulphur-containing VOCs.

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Section: Structured Catalystsmentioning

confidence: 99%

Catalysis in VOC Abatement

et al. 2011

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“…Some researchers were showed the grain size has a strong influence on the properties, the surface increases when the size of the grains decreases which leads to a higher activity [18,19]. In other work, An and co-workers showed in hydrogen peroxide bed, the performance was better when using alumina pellets than when using 1 3 monolith support because of higher bed pressure and temperature [20]. Hence, an appropriate form and structure of the supported iridium catalysts based on the catalytic decomposition of hydrazine or hydrazine borane can be a good alternative to existing catalysts [21,22].…”

Section: Introductionmentioning

confidence: 98%

Development of novel supported iridium nanocatalysts for special catalytic beds

et al. 2019

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In the present paper, an experimental study of the catalytic decomposition of hydrous hydrazine was investigated on the different structural forms of the catalyst. The synthesized iridium catalysts have been usually used directly and have not been evaluated in the laboratory reactor. This study includes the preparation of iridium-based catalysts supported on spherical (alumina), honeycomb monoliths (cordierite) and foams (alumina) for the evaluation of catalytic activity in the laboratory reactor. The characterizations of these catalysts were evaluated by the TGA, FESEM and BET analysis. The result of the catalytic characterization of monolithic support was shown a homogeneous distribution of active metal without any problem of sintering (average size 25 nm) on the support surface. While the surface of the spherical and foam supports were shown non-uniform distribution of nanoparticles on the support skeleton (average size 55 nm). The monolithic catalyst exhibits higher decomposition rate and H 2 selectivity than other supports due to uniform in shape and particle size distribution.

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“…Its specific surface area is low, but it could be increased with alumina wash coating. Separation of propellant flow in the channel of honeycomb structures poses additional problems in the monolith catalyst support [12]. Alumina pellets represent a superior catalyst support with a large specific surface area of 200 m 2 /g.…”

Section: Introductionmentioning

confidence: 99%

“…A good catalyst bed should maintain its specific surface area and resist breakup at high mass flow rate of the propellant to deliver the design thrust. A number of materials have been tested as catalyst supports: silver screen [6][7][8], monolith with alumina wash coated [9,10], and commercial alumina pellets [11][12][13]. Silver screens have been widely used for hydrogen peroxide decomposition ever since the dawn of space age and are still used in some spacecraft.…”

Section: Introductionmentioning

confidence: 99%