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Thermal Adsorption Spectroscopy of Hydrogen Isotopes from CHA-Type Zeolites
Published in Fusion Science and Technology, 2023
Akira Taguchi, Haruka Hamashima, Takumi Nakamori, Yuki Yoneyama
The use of sorption isotherm or adsorption studies evaluating the separation factors has been common,18–20 with thermal desorption studies on the rise in recent years. That is, desorption of H2 and D2 from adsorbents is measured as a function of temperature following prior adsorption of the hydrogen molecules at an adequate temperature Tad.. Thermal desorption spectroscopy (TDS) provides both quantitative analysis of an adsorbate and the desorption temperature. However, adsorption behavior at elevated temperatures has received relatively less research attention. We have previously found unique hydrogen desorption properties in CHA-type zeolites. Here, we report the thermal adsorption spectroscopy (TAS) of H2 and D2 single gases in CHA- and LTA-type zeolites, and compare these against the behaviors of active carbon and Ni-MOF-74.