Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Young Sun Uh"'
Publikováno v:
Korean Journal of Chemical Engineering. 18:392-395
Co-Silicalite-1 (Co2.3Si93.7O192) was synthesized from Co2+ ion exchanged magadiite. The characteristics of Co-Silicalite-1 were investigated by using X-ray powder diffraction, IR spectroscopy, surface area measurement, NH3 temperature programmed des
Publikováno v:
Applied Catalysis A: General. 210:345-353
The vapor phase Beckmann rearrangement of cyclohexanone oxime to e-caprolactam has been studied using various metal pillared ilerites (M-ilerite) as catalysts. Ta- and Nb-ilerite exhibited high catalytic activities for the vapor phase Beckmann rearra
Autor:
John B. Parise, Sun Jin Kim, Geoffrey M. Johnson, Yongjae Lee, Akhilesh Tripathi, Young Sun Uh
Publikováno v:
Chemistry of Materials. 12:3760-3769
Two new aluminogermanates, K-AlGe-GIS (K 8 Al 8 Ge 8 O 32 .8H 2 O) and Na-AlGe-GIS (Na 24 Al 24 Ge 24 O 96 40H 2 O), with the zeolite gismondine (GIS) type framework topology have been synthesized hydrothermally and characterized using single-crystal
Publikováno v:
Microporous and Mesoporous Materials. 30:213-218
Mn-silicalite-1 (Mn 5.2 Si 90.8 O 192 ) was synthesized from Mn 2+ ion-exchanged magadiite. The characteristics of Mn-silicalite-1 were investigated using electron spin resonance, synchrotron X-ray powder diffraction, IR spectroscopy and chemical ana
Publikováno v:
Catalysis Letters. 57:179-185
Selective reduction of NO by CH4 in the presence of excess O2 has been studied on cobalt-ion-exchanged synthetic clinoptilolite (Co-CLI) zeolite. The catalytic results are compared with those obtained from Co-ZSM-5 and Co-FER, the two most widely stu
Publikováno v:
Korean Journal of Chemical Engineering. 15:566-569
The adsorption of molecular oxygen at room temperature on the proton form of MFI zeolites with different Si/Al ratios has been investigated by temperature-programmed desorption (TPD). The internal Si-OH defects (silanol groups) in these zeolites are
Publikováno v:
Catalysis Letters. 55:105-112
A pure, highly crystalline clinoptilolite (CLI) zeolite with a Si/Al ratio of 5.8 has been synthesized using a small amount (1%) of seed crystals and tested as a catalyst for the skeletal isomerization of 1‐butene at 623–723 K at atmospheric pres
Publikováno v:
Catalysis Letters. 44:165-169
Temperature-programmed desorption (TPD) and electron spin resonance (ESR) techniques have been employed to investigate the oxygen adsorbed on the paramagnetic defect centers in dehydroxylated AlPO4-20, AlPO4-11, AlPO4-5, and VPI-5 molecular sieves. T
Publikováno v:
Catalysis Letters. 36:249-253
Three ferrierite (FER) and five ZSM-5 (MFI) zeolites with SiO2Al2O3 ratio ranging from 27 to 2000 are tested as catalysts for the skeletal isomerization of 1-butene at 350–450°C and atmospheric total pressure in order to study the influence of aci
Publikováno v:
Reaction Kinetics and Catalysis Letters. 57:291-299
The luminescence spectra of TbLi-Y, TbNa-Y and TbK-Y zeolites treated at different temperatures are reported. It is found that the intrazeolitic migration temperature of Tb(III) ions to hexagonal prisms is influenced by the type of the alkali metal i