Zobrazeno 1 - 9 of 9 pro vyhledávání: '"Suzanne E. Schramm"'
1
Type and catalytic activity of surface acid sites of medium and large pore zeolites Their deactivation with bulky organophosphorus compounds
Autor: Suzanne E. Schramm, Catherine S. Hsia Chen
Publikováno v: Microporous Materials. 7:125-132
External surface acid sites of medium and large pore zeolites have been probed by deactivation with bulky organophosphorus compounds followed by examination of the deactivated catalysts with 31P NMR. Results show that HZSM-5 (SiO2Al2O3 = 70); and zeo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c46770ce10b9446da19ba0e8fd5139c7
https://doi.org/10.1016/0927-6513(96)00003-x
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2
Specific catalytic activity at the HZSM-5 surface for the polymerization of tetrahydrofuran
Autor: Catherine S. Hsia Chen, Steven Edward Wentzek, Suzanne E. Schramm
Publikováno v: Microporous Materials. 6:205-212
The polymerization of tetrahydrofuran has been investigated by using medium- and large-pore zeolites as catalysts. HZSM-5 (SiO2/Al2O3 = 70; small crystals) shows distinctly the highest activity. Under the same conditions, medium pore zeolite HZSM-23
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13999373545b9dc1a725f8ae4ec0d6cb
https://doi.org/10.1016/0927-6513(96)00005-3
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3
Evidence of zeolite-solution equilibrium for isomorphous substitution using aqueous metal fluoride complexes
Autor: Suzanne E. Schramm, Scott Han, Kirk D. Schmitt, David S. Shihabi, Clarence D. Chang
Publikováno v: Inorganica Chimica Acta. 229:81-85
The reversibility of isomorphous substitution of tetrahedral framework metal ions using aqueous A1F 3 and (NH 4 ) 2 SiF 6 treatments on zeolite ZSM-5 is reported. 19 F NMR studies of A1F 3 and SiF 6 2− D 2 O solutions after reaction at 85 °C which
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::887974b323f9c66c16c3aa6218ef83a6
https://doi.org/10.1016/0020-1693(94)04229-o
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4
Characterization of zeolites and amorphous silica—aluminas by means of aluminum-27 nuclear magnetic resonance spectroscopy: A multifield, multiparameter investigation
Autor: Kirk D. Schmitt, Jiirgen Haase, Suzanne E. Schramm, Eric Oldfield
Publikováno v: Zeolites. 14:101-109
We have obtained the aluminum-27 nuclear magnetic resonance (n.m.r.) spectra of a large number of ZSM-5 (MFI) zeolites and amorphous silica aluminas by using static, spin-echo, and “magic-angle” sample-spinning (MAS) techniques, at various magnet
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::647fa146c45ae3ad4a4945f576fabcee
https://doi.org/10.1016/0144-2449(94)90003-5
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5
Investigations into the nature of the hexagonal polytype of faujasite
Autor: Mark E. Davis, David J. Young, Suzanne E. Schramm, Michael J. Annen, Juan P. Arhancet
Publikováno v: Zeolites. 11:98-102
Synthetic, cubic faujasite, and the hexagonal polytype of faujasite were synthesized according to the procedures of Delprato et al. (Zeolites for the Nineties-Recent Research Reports, 8th International Zeolite Conference, Amsterdam, 1989 ). 29Si, 27A
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::400caa1bfaa246a15c510a0a96727e0c
https://doi.org/10.1016/0144-2449(91)80401-k
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