Effect of ammonia treatment on Pt catalyst used for lowtemperature reaction

Jeongmin Ahn, P. D. Ronney

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Platinum based catalysts are well known as the most active ones among noble metals for oxidation of hydrocarbons as well as hydrogen. Microcombustion experiments using bare Pt foil catalyst have shown that hydrocarbon fuels (e.g. propane) can be oxidized at low-temperature (<60 °C) by treating the catalyst surface by burning propane-air mixtures with ∼ 5 % of the propane replaced by ammonia for half an hour. This NH3pre-treatment creates step-like structures on the scale of few μms, after hydrocarbon combustion testing, completely unlike those without NH3treatment. This change in structure with NH3treatment is noteworthy in that it increases the performance of the catalyst by a factor of 3, but only for low-temperature reactions characteristic of microcombustors. This is not merely a surface area effect, since increasing bulk catalyst area had almost no effect on combustion performance.

Original languageEnglish (US)
Title of host publication5th US Combustion Meeting 2007
PublisherCombustion Institute
Pages3409-3416
Number of pages8
Volume6
ISBN (Print)9781604238112
StatePublished - 2007
Event5th US Combustion Meeting 2007 - San Diego, United States
Duration: Mar 25 2007Mar 28 2007

Other

Other5th US Combustion Meeting 2007
CountryUnited States
CitySan Diego
Period3/25/073/28/07

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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