Quantum sieving effect of modified activated carbon fibers on H2 and D2 adsorption at 20 K

Yoshiyuki Hattori; Hideki Tanaka; Fujio Okino; Hidekazu Touhara; Yoshitaka Nakahigashi; Shigenori Utsumi; Hirofumi Kanoh; Katsumi Kaneko

doi:10.1021/jp0618025

Quantum sieving effect of modified activated carbon fibers on H2 and D2 adsorption at 20 K

J Phys Chem B. 2006 May 25;110(20):9764-7. doi: 10.1021/jp0618025.

Authors

Yoshiyuki Hattori¹, Hideki Tanaka, Fujio Okino, Hidekazu Touhara, Yoshitaka Nakahigashi, Shigenori Utsumi, Hirofumi Kanoh, Katsumi Kaneko

Affiliation

¹ Department of Chemistry, Faculty of Science, Chiba University, Inage, Japan.

PMID: 16706423
DOI: 10.1021/jp0618025

Abstract

Quantum sieving of activated carbon fibers (ACFs) and their fluorides was observed for H(2) and D(2) adsorption at 20 K. Fluorination reduced the slit-shaped pore width of ACFs by 0.2 nm. The activated carbon fibers can act as highly efficient quantum sieves for H(2) and D(2), because the effective size of an H(2) molecule is larger than that of a D(2) molecule due to the uncertainty principle and the molecular size difference between H(2) and D(2) is significant in the micropore space. The D(2)/H(2) selectivity of ACFs evaluated by ideal adsorption solution theory was larger than that of the fluorinated ACFs.