Temperature Programmed Desorption

Category

Characterization Tools

Laboratory

National Renewable Energy Laboratory (NREL)

Capability Expert(s)

Tom Gennett ([email protected])

Description

Temperature programmed desorption is a dynamic measurement that monitors the evolution of a gas(es) upon heating. Gas evolution can be monitored by a pressure sensor, mass flow meter, and/or by the use of a mass spectrometer (MS) to determine the chemical composition of the evolved gas. TPD can be used to study reaction kinetics and mechanisms, detect reactions, material impurities, and composition.  TPD can also be utilized to evaluate sorption process, including measuring the activation energy of sorption. Within HyMARC, we have the capability to dose samples up to 2 bar with Hydrogen gas, quench with LN2 and utilize a controlled ramp from 1-50 ˚C/min to evaluate the desorption processes and capacity under low pressure conditions.

Figure

Temperature programmed desorption system inside a laboratory against a wall, comprising of a network of pipes, valves, and control mechanisms.

Temperature programmed desorption system including mass spec and gas manifold.