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Real-Time Monitoring of Heterogeneous Catalysis with Mass Spectrometry
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Abstract
Heterogeneous, gas–solid processes constitute an important class of catalytic reactions that play a key role in a variety of applications, such as industrial processing and environmental controls. Heterogeneous catalytic chemistry can be demonstrated in a simple heated flow reactor containing a fragment of the catalytic converter from a vehicular exhaust system. The reaction can be carried out under atmospheric pressure conditions, obviating the need for expensive and cumbersome vacuum equipment. The heterogeneous conversion of small molecules is easily monitored with a quadrupole mass spectrometer (QMS) of moderate mass resolution. While sampling at atmospheric pressure can normally be problematic, self-contained QMS instruments that utilize differential pumping are available and can be incorporated into the flow reactor. Combining these concepts and design ideas we have instituted an experiment for undergraduate chemistry students that illustrates concepts in surface science and catalysis while facilitating exposure to operational aspects of mass spectrometry and real-time monitoring of a process flow stream.
Keywords (Audience):
Upper-Division UndergraduateKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
CatalysisCiting Articles
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This article has been cited by 2 ACS Journal articles (2 most recent appear below).
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Mark A. YoungJournal of Chemical Education2010 87 (2), 180-182Demonstration of a Catalytic Converter Using a Lawn Mower Engine
Mark A. YoungJournal of Chemical Education2010 87 (2), 180-182Catalytic conversion is an important tool in environmental-remediation strategies and source removal of pollutants. Because a catalyst is regenerated, the chemistry can be extremely effective for conversion of undesirable pollutant species to less harmful ...
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History
- Received: August 03, 2009
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