Micromeritics introduces the MicroStar residual gas analyzer, a quadrupole mass spectrometer that complements Micromeritics’ AutoChem 2920 and 2950 dynamic chemisorption analyzers. The MicroStar is ideally suited for pulse chemisorption studies and temperature-programmed reactions allowing the user to follow the evolution of residual gases from the AutoChem. This information may then be used to determine reaction kinetics, product selectivity, and reaction yields; all of which are vital components of a successful catalyst development program. Unlike traditional temperature-programmed desorption or reduction experiments where only one active gas is monitored, the MicroStar provides continuous monitoring of reaction products (up to 128 different masses).

The MicroStar features a biased ionization chamber to minimize background signals and prevent desorption of gas particles from the chamber walls. Enhanced performance is also achieved by use of field-axis technology, which provides a high level of sensitivity without the requirement for additional filters. The MicroStar is available with the following mass ranges: 100 amu, 200 amu, and 300 amu. In addition to the standard Faraday detector, the MicroStar may be configured with an electron multiplier to enhance the low limits of detection.

Micromeritics’ AutoChem II 2920 Chemisorption Analyzer is an automated instrument capable of conducting a comprehensive array of highly precise chemical adsorption and temperature-programmed reaction studies. The instrument gives the researcher the ability to obtain valuable information about the physical properties of catalysts, catalyst support, and a variety of other materials. Researchers can investigate active metal surface area, surface acidity, distribution and strength of active sites, BET surface area, and more. Multiple experiments can be run using the same sample.

The AutoChem 2950 HP is an automated, bench-top, microreactor system designed for catalyst characterization up to 70 atmospheres (1000 psia) over a wide range of temperatures. These instrument capabilities allow researchers to conduct experiments and characterize their materials at conditions approaching commercial operation. The design of the AutoChem 2950 HP complements the AutoChem 2920 with a combination of high-quality hardware, a simple-to-use software interface, and a report system that allows users to determine active surface area and activation energy.