Details

Autor(en) / Beteiligte

• Efstathiou, Angelos M.
• Suib, Steven L.
• Bennett, Carroll O.

Titel

Encapsulation of molecular hydrogen in zeolites at 1 atm

Ist Teil von

• Journal of catalysis, 1990-06, Vol.123 (2), p.456-462

Ort / Verlag

Amsterdam: Elsevier Inc

Erscheinungsjahr

1990

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• About 1 μmol/g of molecular H 2 is encapsulated in the sodalite cages of Na X zeolite at 37°C and 1 bar H 2 pressure. The removal of this hydrogen by diffusion can be studied by temperature programming between 40 and 150°C under 1 bar Ar gas. The activation energy for diffusion is 8.1 kcal/mol. The amount of H 2 trapped is more than an order of magnitude less than that expected for chemisorption on a catalyst like cobalt on Na X. Exchanging Cs +, Ni 2+, and Eu 3+ for Na + cations into the supercages, hexagonal prisms, and sodalite cages, respectively, of X zeofite, leads to the conclusion that H 2 is trapped in the sodalite cages.