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Quantum Molecular Sieving Effects of H<sub>2</sub> and D<sub>2</sub> on Bundled and Nonbundled Single-Walled Carbon Nanotubes

Hirotoshi KagitaGraduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, JapanTomonori OhbaGraduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, JapanToshihiko FujimoriResearch Center for Exotic Nanocarbons, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, JapanHideki TanakaDepartment of Chemical Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, JapanKenji HataNanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi Tsukuba, Ibaraki 305-8565, JapanSei-ichi TairaGraduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, JapanHirofumi KanohGraduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, JapanDaiki MinamiResearch Center for Exotic Nanocarbons, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, JapanYoshiyuki HattoriFaculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda 386-8567, JapanTsutomu ItohChemical Analysis Center, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, JapanHyuma MasuChemical Analysis Center, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, JapanMorinobu EndoResearch Center for Exotic Nanocarbons, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, JapanKatsumi KanekoResearch Center for Exotic Nanocarbons, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan

2012en

ABI

Annotatsiya

The quantum molecular sieving effects of pore-structure-controlled single-walled carbon nanotubes (SWCNTs) for H2 and D2 were evaluated at 20, 40, and 77 K. The adsorption amounts of D2 were larger than those of H2. The lower the adsorption temperature, the greater the difference between the D2 and H2 adsorption amounts. Bundled SWCNTs with interstitial pores of diameter 0.6 nm gave the greatest adsorption difference between D2 and H2 per unit pore volume. Diffusion-dominated behavior was observed in the low-pressure region at 20 and 40 K as a result of lower mobility. Bundled SWCNTs with only interstitial pores provided a significant quantum molecular sieving as a result of strongly interacting potential wells.

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DOI: 10.1021/jp3065085

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