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Knowledge of surface chemistry and surface structure is essential
in the design, production, and application of catalytic material.
The Micromeritics ChemiSorb 2720 and ChemiSorb 2750 quickly
and accurately measure the allowing determination of these
characteristics. The ChemiSorb 2720 makes chemisorption and
physisorption analysis affordable for applications in which
owning an instrument had once been impractical. Furthermore,
if analytical needs grow, the basic system can be upgraded
to provide more capability.
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ChemiSorb 2720
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ChemiSorb 2750
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Typical ChemiSorb Applications
- Catalysts
- Fuel Cell
- Partial oxidation
- Catalytic cracking
- Catalytic-reforming catalysts
- Isomerization catalysts
- Hydrocracking, hydrodesulfurization, and hydrodenitrogenation
catalysts
- Fischer-Tropsch syntesis
The Analytical Technique
The ChemiSorb 2720 and Chemisorb 2750 both utilize the dynamic
(flowing gas) technique of analysis. The quantity of gas adsorbed
from the gas stream by the sample is monitored by a downstream
thermal conductivity detector (TCD). The temperature and presure
at which adsorption occurs is either known or monitored. The
intruments can be used to study physical or chemical adsorption.
Preparation usually is accomplished by flowing either an inert
or chemically active gas over the sample. After preparation,
another gas is selected for analysis. Prep and carrier gases
typically used to allow both physical and chemical adsorption
experiments are Helium, Argon, Nitrogen, Helium or Niterogen
mixtures, Hidrogen and Oxygen some serving as both prep and
carrier.
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