Researchers use catalytic reactors to evaluate the catalytic performances including conversion, selectivity and stability of various heterogeneous catalysts. Infrared spectroscopy is powerful in providing information on the surface reaction intermediate and the chemical nature of catalytic sites.
The catalytic reactor systems can evaluate the performances of catalysts in both steady state and temperature-programmed (TP) modes. The steady state tests including transient kinetic analysis via isotope labeling provide intrinsic catalytic behaviors in rate, selectivity, and stability while the TP measurements gives insights on the evolution of catalysts during reduction, oxidation and other conditions, the adsorption and reaction of reactants/products and the dispersion of oxide and metal sites.
The operando IR spectroscopy can probe surface adsorbates and chemistry (via IR) under actual working conditions while simultaneously determine catalytic activity and selectivity (via online mass spectrometer).
The catalytic reactor systems have been used to evaluate various heterogeneous catalysts in terms of their performance in conversion, selectivity and stability in various gas phase reactions. These catalytic systems can also be investigated mechanistically via the operando IR system. Previous work includes studying thermal catalysis over transition metal oxides, zeolites, carbon nanostructures, and supported metals.
- AMI-200 and AMI-300 (with SSITKA capability) coupled with online GC and MS. Temperature and pressure ranges: 173 – 1200 K, up to 1 atm
- IR system: coupling with online MS, diffuse reflectance reactors handling temperature 120 – 1000 K and pressure up to 1 atm.
- Gas flow: various oxidative, reductive and reaction feeds
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