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Measurement and analysis of spatial reactor profiles in high temperature catalysis research
Publikationstyp
Journal Article
Date Issued
2011-10-01
Sprache
English
Author(s)
Volume
50
Issue
10
Start Page
998
End Page
1009
Citation
Chemical Engineering and Processing: Process Intensification 50 (10): 998-1009 (2011)
Publisher DOI
Scopus ID
Publisher
Elsevier
Spatial reactor profile measurements are a novel tool in chemical reaction engineering research. In this technique species concentrations or molar flow rates, phase temperatures and spectroscopic information are measured as function of the axial coordinate in a continuous flow tubular reactor. The obtained spatial gradients can be analyzed in terms of kinetic and mechanistic information about the reaction under study. The advantage of the spatial profile technique is that transient data are obtained at steady state and that it can be applied at temperature and pressure conditions relevant for industrial application. After a detailed description of the method various application examples are discussed such as methane catalytic partial oxidation on rhodium and platinum coated foam catalysts, methane oxidative coupling in the gas phase and oxidative dehydrogenation of ethane to ethylene on a supported molybdenum oxide catalyst. It is demonstrated how information about film transport limitation and reaction pathways can be extracted. The importance of spatial reactor profiles for validation of microkinetic models is highlighted for gas phase methane oxidative coupling at elevated pressure. Finally the idea of spatially resolved Raman spectroscopy using an optical fiber sensor is demonstrated and key parameters such as spatial resolution and position accuracy are determined.
Subjects
Ethane
Kinetic modeling
Methane
Molybdenum oxide
Oxidative coupling
Oxidative dehydrogenation
Partial oxidation
Platinum
Raman spectroscopy
Reactor profiles
Rhodium
Transport limitation
DDC Class
540: Chemistry