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Stainless steel foam supported catalysts for the oxidation of aromatic compounds

A catalyst and stainless steel technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst activation/preparation, etc., can solve the problem of no non-toxic alternatives

Pending Publication Date: 2018-11-09
UNIV COURT OF THE UNIV OF ST ANDREWS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, there are no other non-toxic alternatives to TCP as a jet engine oil lubricity additive

Method used

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  • Stainless steel foam supported catalysts for the oxidation of aromatic compounds
  • Stainless steel foam supported catalysts for the oxidation of aromatic compounds
  • Stainless steel foam supported catalysts for the oxidation of aromatic compounds

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Embodiment Construction

[0026] In a first aspect, the present invention provides a catalyst comprising iron oxide, nickel, ceria or palladium supported on stainless steel foam.

[0027] The catalyst of the present invention utilizes a stainless steel foam support. Stainless steel is an iron alloy containing chromium, typically in an amount of at least 10.5% by weight chromium. Suitable stainless steel foam supports are commercially available, eg, stainless steel 314 foam 40-ppi, 4.5% density (Porvair). In one embodiment, the steel has a SAE (Society of Automotive Engineers) / AISI (American Iron and Steel Institute) grade prefixed with 3. A suitable support is SAE / AIS grade 314 stainless steel.

[0028] The stainless steel foam utilized in the carrier has an open porous structure. Suitable stainless steel foams have 0.04 to 0.95 gcm -3 Density. Suitable stainless steel foams have, for example, 0.1096m 2 / g of BET surface area.

[0029] The stainless steel foam carrier is loaded with one of iron ...

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PUM

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Abstract

The invention provides a catalyst comprising iron oxide, nickel, ceria or palladium supported on stainless steel foam. The catalyst is effective in oxidising aromatic compounds such as toluene and o-cresol and, advantageously, is particularly effective when the oxidation is carried out at elevated temperatures that correspond to temperatures attained in areas of the aircraft where cabin air is recirculated.

Description

field of invention [0001] This invention relates to stainless steel foam supported catalysts useful for the oxidation of aromatic compounds. One aspect of the invention includes the use of these catalysts in a method of treating air in an air conditioning system. Background of the invention [0002] In a typical passenger aircraft, the cabin air system takes air from the bottom of the cabin through a recirculation filter into a mixing chamber where it mixes (50 / 50) with outside air and is then passed back into the cabin. HEPA filters (High Efficiency Particulate Air Filters) are used in cabin air recirculation systems to improve cabin air quality by removing particulate contaminants such as dust, fibres, dander, droplets and can be used to remove bacteria and viruses. However, such filters are not capable of removing volatile organic compounds (VOCs). VOCs can be present in both the recirculated air and the outside air entering the air circulation system. These can come ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J23/10B01J23/44B01D53/86B01J23/745B01J23/755B01J35/02B01J35/04B01J35/10
CPCB01J37/0225B01J23/10B01J23/44B01D53/86B01J23/755B01J35/023B01J35/04B01J35/1009B01J37/0228B01J37/08B01D53/8668B01D2251/11B01D2255/1023B01D2255/2065B01D2255/20738B01D2255/20753B01D2257/708B01D2259/4575B64D2013/0651B01J23/745B64D13/06B01J23/862B64D2013/0603
Inventor J·T·S·欧文马克·卡西迪斯内·贾因
Owner UNIV COURT OF THE UNIV OF ST ANDREWS