Using physisorption-chemisorption cycles to study catalyst deactivation
A method to characterize catalysts before, during, and after catalytic tests without transferring the sample or exposing it to atmosphere is reported. Back-to-back physisorption and chemisorption is measured on the Autosorb 6300 using a catalyst for propane dehydrogenation as a model sample.
Catalyst characterization typically consists of both physisorption and chemisorption, performed before and after catalysis. The analyses are sometimes additionally performed after catalyst recycling. Each of those analyses are typically done in different sample cells or instruments, requiring sample transfer before each measurement. Such transfer intrinsically introduces error due to atmospheric exposure, sample loss, or contamination. In this study, we took advantage of the Autosorb 6300’s ability to perform physisorption,
chemisorption, and catalytic testing to run all characterization experiments successively without ever transferring the sample or exposing it to atmosphere.
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