Catalyst Research of Active Surface Area With Chemisorption Instruments by Micromeritics

Topics Covered

Background
Chemical Adsorption Analysis Techniques
Chemisorption Analysis Environment
ChemiSorb 2720 and ChemiSorb 2750
AutoChem II 2920 Automated Catalyst Characterization System
ASAP 2020 Accelerated Surface Area and Porosimetry Analyzers

Background

Catalysts are used in a variety of applications from the production of consumer goods to the protection of the environment. Optimum design and efficient utilization of catalysts require a thorough understanding of the surface structure and surface chemistry of the active material.

Chemical Adsorption Analysis Techniques

Chemical adsorption (chemisorption) analysis techniques provide much of the information necessary to evaluate catalyst materials in the design and production phases, as well as after a period of use. Catalytic activity is evaluated by measuring the amounts and types of reactive gas adsorbed. This volume of gas, along with an understanding of the reaction stoichiometry, is used to calculate metal dispersion, active surface area, size of crystallites, and surface acidity.

Chemisorption Analysis Environment

Micromeritics instruments are specifically designed for the highly aggressive environment present during chemisorption analysis. Internal components are constructed of highest-quality stainless steel to prevent reactivity with most commonly used chemisorptives. Heated manifolds, gas lines, and detectors are provided to allow analysis with condensable vapors. Sample preparation occurs in situ to prevent contamination prior to analysis. Samples can be prepared at high temperatures (up to 1100 deg C) and at low pressures (<10^-5 mmHg).

ChemiSorb 2720 and ChemiSorb 2750

The ChemiSorb analyzers are designed to assist in the development, testing, and production of catalysts. The ChemiSorb 2720 and ChemiSorb 2750 can be equipped to perform a full suite of experiments including both physical and chemical adsorption. Not only are these instruments of value in industrial and research applications, their simplicity and hands-on setup and operation make them excellent teaching tools for colleges and universities.

The ChemiSorb 2720 and ChemiSorb 2750 from Micromeritics

AutoChem II 2920 Automated Catalyst Characterization System

The AutoChem II 2920 Automated Catalyst Characterization System performs a full array of highly precise, temperature-programmed chemisorption studies.