A novel high-pressure flow reactor designed to operate with real powder catalysts at pressures up to 10 bar and temperatures up to 400 °C is described. The gas flow is regulated by mass flow controllers, and the temperature is adjusted by a proportional integral derivative control. Using a heatable capillary along with strong differential pumping allows the gas composition to be monitored on-line. The high-pressure volume is kept small in order to ensure rapid evacuation after the reaction. All parts of the system exposed to gas pressure and temperature are made of metal or ceramic. The reactor is attached to an ultra-high-vacuum system equipped with x-ray photoelectron spectroscopy and secondary ion mass spectrometry for surface and reaction studies. The performance of the system is demonstrated by CO-hydrogenation experiments with promoted Pd/SiO2 catalysts.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.