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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents

ID: 475794.0, Fritz-Haber-Institut / Inorganic Chemistry
Reactor for In-Situ Measurements of Spatially Resolved Kinetic Data in Heterogeneous Catalysis
Authors:Horn, Raimund; Korup, Oliver; Geske, Michael; Zavyalova, Ulyana; Oprea, I.; Schlögl, Robert
Research Context:High temperature catalysis
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Review of Scientific Instruments
Journal Abbrev.:Rev. Sci. Instrum.
Issue / Number:6
Start Page:064102-1
End Page:064102-6
Copyright:Copyright © 2010 American Institute of Physics
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The present work describes a reactor that allows in-situ measurements of spatially resolved kinetic data in heterogenous catalysis. The reactor design allows measurements up to temperatures of 1300 ±C and 45 bar pressure, i.e. conditions of industrial relevance. The reactor involves reactants flowing through a solid catalyst bed containing a sampling capillary with a side sampling orifice through which a small fraction of the reacting fluid (gas or liquid) is transferred into an analytical device (e.g. MS, GC, HPLC) for quantitative analysis. The sampling capillary can be moved with ¹m resolution in or against flow direction to measure species profiles through the catalyst bed. Rotation of the sampling capillary allows averaging over several scan lines. The position of the sampling orifice is such that the capillary channel through the catalyst bed remains always occupied by the capillary preventing flow disturbance and fluid bypassing. The second function of the sampling capillary is to provide a well which can accommodate temperature probes such as a thermocouple or a pyrometer fiber. If a thermocouple is inserted in the sampling capillary and aligned with the sampling orifice fluid temperature profiles can be measured. A pyrometer fiber can be used to measure the temperature profile of the solid catalyst bed. Spatial profile measurements are demonstrated for methane oxidation on Pt and methane oxidative coupling on Li/MgO, both catalysts supported on reticulated a-Al2O3 foam supports.
Free Keywords:in-situ; heterogeneous catalysis; Kinetic
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Electronic Structure and Adsorption / Metals
Fritz-Haber-Institut/Inorganic Chemistry/Inorganic Chemistry
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