Yoshihiro Sugi

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Steric interaction of reagents with nanospace of zeolites was studied in alkylation: isopropylation, sec-butylation, and tert-butylation of naphthalene (NP) over several large-pore zeolites to elucidate the mechanism of shape-selective catalysis. Selectivities for β,β- and 2,6-dialkylnaphthalene (DAN) were influenced by the type of zeolite and bulkiness of(More)
CO2 adsorption measurement at 273 K was employed to see if the porous material has either micropore or mesopore dominantly. The adsorption isotherm of CO2 on microporous solid such as zeolite A and Y was the typical Langmuir type while on SBA-15, silica gel and polymer, the adsorption isotherm was proportional to the applied pressure, following the Henry's(More)
The nano-sizedbeta-zeolites were synthesized first time by dry gel conversion (DGC) method without the use of sodium hydroxide. Resultant beta-zeolites had particle size of 35-80 nm with SiO2/Al2O3 ratios in the range of 25-400. They had BET surface areas in the range of 290-750 m2 x g(-1) and the external surface area of 41-283 m2 x g(-1): cumulative(More)
Fe(III) containing mesoporous materials (FeMMSH) with zeolite building units were first time synthesized. XRD and N2 adsorption/desorption analysis confirm the mesoporous characters similar to MCM-48. FT-IR analysis of FeMMSH showed an additional band at about 530-550 cm(-1), characteristic of double five-membered ring of zeolite (ZSM-5) secondary building(More)
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