Ortho-para-hydrogen and para-ortho-deuterium separation factors on LiX zeolite at 50-112 K

• Autorzy: Bystrov V. P. , Ivanov E. B. , Parbuzin V. S.
• Języki publikacji: EN

Abstrakty

EN

The paper reports on a comprehensive set of experimentally measured orthopara- H2 and para-ortho-D2 separation factors at low temperature adsorption on an especially prepared sample of X type zeolite. The zeolite was investigated in its lithium cationic form by a new version of the gas solid chromatographic technique ECMA (Elution Chromatography with Modifying Adsorbates). Six types of eluents were used: four pure gases He, Ne, H2, D2, and two mixed eluents – He-H2 and He- D2 various compositions. The new ECMA version gives results of high precision. At easily attainable temperatures 77-50 K and practically suitable fractional coverages 0.6-0.8, the selectivity of adsorbent LiX ranges from 1.45 to 2.0 for ortho-para-H2, and 1.108 - 1.254 for para-ortho-D2. A low ortho-para-conversion catalytic activity and high selectivity of new sorbent LiX allow separation of orthopara- isomers of dihydrogens by Moving Temperature Gradient Adsorption technique.

Słowa kluczowe

EN

ortho-para- H2; ortho-para-D2; adsorptive separation coefficients; zeolite LiX

• Wydawca: Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz
• Czasopismo: Ars Separatoria Acta
• Rocznik: 2006
• Tom: No. 4
• Strony: 37--42
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Bystrov V. P.

autor

Ivanov E. B.

autor

Parbuzin V. S.

• Department of Chemistry, M.V. Lomonosov Moscow State University, Vorob’evy Gory, 119899, Moscow, Russia,

Bibliografia

• [1] A. Farkas, Orthohydrogen, parahydrogen and heavy hydrogen, Cambridge University Press, 1935.
• [2] V.S. Parbuzin, V.A. Yakovlev, A.A. Lukyanov, Y.A. Leshchev, Ars Separatoria Acta, 2003, 2, 84-96.
• [3] J. Van Kranendonk, Solid Hydrogen: Theory of the Properties of Solid H2, HD, and D2, Plenum Press, New York, 1983.
• [4] A.P. Serebrov, Uspekhi Fizicheskih Nauk, 2005, 175, 905-924.
• [5] T. Oka, http://fermi.uchicago.edu/publications/
• [6] a) T. Momose, Vibr. Spectroscopy, 2004, 34, 95-108; b) J. Natterer, T. Greve, J. Bargon, Chem. Phys. Lett., 1998, 293, 455-460.
• [7] N.S. Sullivan, D. Zhou, C.M. Edwards, Cryogenics, 1990, 30, 734-735.
• [8] S. Tam, M.E. Fajardo, Rev. Sci. Instr., 1999, 70, 1926-1932.
• [9] C.M.Cunningham, D.S.Chapin, H.L.Johnston, J.Amer.Chem.Soc., 1958, 80, 2382-2384.
• [10] B.N. Zimoglyad, Y.P. Blagoi, G.G. Zhun. Zh. Fiz. Khim., 1966, 40, 2871-2875.
• [11] M.J. Clouter, J. Phys. E: Sci. Instrum., 1972, 5, 1099-1102.
• [12] A. Honig, M. Lewis, Z.-Z. Yu, S. Yucel. Phys. Rev. Lett., 1986, 56, 1866-1871.
• [13] F.R. Fitch, M. Bulow, A.F. Ojo, US Pat. No. 5464467 (1995).
• [14] V.S. Parbuzin, Thesis, Moscow State University, 1966.
• [15] B.N. Zimoglyad, Y.P. Blagoi, G.G. Zhun, S.N. Doshina, Dokl. AN SSSR, 1970, 194, 606-609.
• [16] V.S. Parbuzin, Y.A. Leshchev, A.A. Lukyanov, K.D. Scherbakova, Zh. Fiz. Khim., 1987, 61, 3077-3078.
• [17] V.S. Parbuzin, V.V. Guliants, Chromatographia, 1990, 30, 283-286.
• [18] E.B. Ivanov, V.S. Parbuzin, Manuscript in preparation.
• [19] A.V. Larin, V.S. Parbuzin, Mol. Phys., 1992, 77, 869-891.