Ovenston et al., 1993 - Google Patents
AC electrical characterization of heterogeneous catalystsOvenston et al., 1993
- Document ID
- 2767624952917922803
- Author
- Ovenston A
- Walls J
- Publication year
- Publication venue
- Journal of Catalysis
External Links
Snippet
At operating temperatures, heterogeneous catalysts behave like lossy dielectrics. The technique of impedance spectroscopy has been used in conjunction with other AC methods to differentiate between different loss processes. At low frequencies and high temperatures …
- 239000002638 heterogeneous catalyst 0 title abstract description 6
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating the impedance of the material
- G01N27/04—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating the impedance of the material by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating the impedance of the material by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
- G01N27/123—Circuits particularly adapted therefor, e.g. linearising circuits for controlling the temperature
- G01N27/124—Circuits particularly adapted therefor, e.g. linearising circuits for controlling the temperature varying the temperature, e.g. in a cyclic manner
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