Zobrazeno 1 - 10
of 148
pro vyhledávání: '"Kazushi Arata"'
Publikováno v:
Applied Catalysis A: General. 321:147-154
Sulfated stannia (SO 4 /SnO 2 ) obtained by drying meta -stannic acids (supplied by Koujundo Kagaku and Yamanaka) at 200 °C, followed by exposing to 3 M H 2 SO 4 and calcining at 300 °C showed catalytic activities higher than those of the materials
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebf36cbf0490b78fbb2f897d0045c6a5
https://doi.org/10.1016/j.apcata.2007.01.044
https://doi.org/10.1016/j.apcata.2007.01.044
Publikováno v:
Biomass and Bioenergy. 30:870-873
Amorphous zirconia catalysts, titanium-, aluminum-, and potassium-doped zirconias, were prepared and evaluated in the transesterification of soybean oil with methanol at 250 °C, and the esterification of n-octanoic acid with methanol at 175–200 °
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a1c2f64c11987868058b4404d126b03
https://doi.org/10.1016/j.biombioe.2005.10.010
https://doi.org/10.1016/j.biombioe.2005.10.010
Publikováno v:
Applied Catalysis A: General. 310:190-193
A solid acid of tungsten-niobium oxide was obtained by evaporating the water from a mixed solution of ammonium metatungstate and niobium ammonium oxalate in water in the ratio 7:1 of W to Nb, followed by calcining in air at 400 °C. The catalytic act
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6240d43e4c7d044ee42ece839e34b5a8
https://doi.org/10.1016/j.apcata.2006.05.038
https://doi.org/10.1016/j.apcata.2006.05.038
Publikováno v:
Catalysis Communications. 7:162-165
A ceramics acid, calcined at temperatures above 1000 °C, was obtained by impregnating metastannic acid with aqueous ammonium metatungstate followed by calcining in air at 1000–1100 °C (5–8 wt% W); its acidity and catalytic activity for decompos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ccb6bc547d2187b706b66b453ac27be
https://doi.org/10.1016/j.catcom.2005.10.003
https://doi.org/10.1016/j.catcom.2005.10.003
Autor:
Kazushi Arata, Hiromi Matsuhashi
Publikováno v:
Catalysis Surveys from Asia. 10:1-7
The relative acid strength and acid amount of solid acids has been determined from the adsorption and desorption of small molecules, such as argon. The order of activation energy for desorption of Ar from a solid acid, determined using temperature-pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbdbb38d595ce8f61ed975c268d86e10
https://doi.org/10.1007/s10563-006-9001-1
https://doi.org/10.1007/s10563-006-9001-1
Publikováno v:
Thermochimica Acta. 441:35-41
Sulfated zirconias were prepared using two kinds of amorphous zirconia gels, XZO 631 and 632 supplied by MEL Chemicals, and their thermal gravimetrical analyses were carried out. DTG of the former sample showed two peaks based on decomposition of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be1d5e85b09655e9f464bd961132b6e5
https://doi.org/10.1016/j.tca.2005.11.042
https://doi.org/10.1016/j.tca.2005.11.042
Autor:
Kazushi Arata, Hideo Nakamura
Publikováno v:
Bulletin of the Chemical Society of Japan. 77:1893-1896
The liquid–solid phase benzoylation of mono-alkylbenzenes with methyl, ethyl, propyl, and butyl groups and xylenes was carried out with benzoic anhydride at 100–110 °C over solid superacids: SO4/Zr...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32effa39151b0e6f23b089ce682294d9
https://doi.org/10.1246/bcsj.77.1893
https://doi.org/10.1246/bcsj.77.1893
Publikováno v:
Applied Catalysis A: General. 269:187-191
Two highly active solid superacids of sulfated tin oxide were prepared, and their catalytic action was compared with that of sulfated zirconia. One was prepared from tin oxide gel, which was precipitated by the hydrolysis of SnCl 4 and washed with aq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74abc44186977bf79fa3211ec791e1fa
https://doi.org/10.1016/j.apcata.2004.04.017
https://doi.org/10.1016/j.apcata.2004.04.017
Autor:
Makoto Hino, Kazushi Arata
Publikováno v:
Reaction Kinetics and Catalysis Letters. 81:321-326
Highly active superacids of Mn-, Fe-, and Al-sulfated ZrO2's for the isomerization of butane to isobutane were obtained by exposing zirconia gel to aqueous solutions of 0.05 M MnSO4, 0.25 M FeSO4, and 0.5 M Al2(SO4)3 followed by calcining in air at 7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08c9751f97e9b07f9cfb7c37c11c1838
https://doi.org/10.1023/b:reac.0000019439.37417.ab
https://doi.org/10.1023/b:reac.0000019439.37417.ab
Publikováno v:
Reaction Kinetics and Catalysis Letters. 81:183-188
The acidity of sulfated alumina catalysts was studied by analyzing DTG and heat of Ar adsorption together with the isomerization of pentane. The initial acid sites were Bronsted-type, and converted into Lewis-type upon increasing the pretreatment tem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0514044dac711b2279eec4fe4b4f7af8
https://doi.org/10.1023/b:reac.0000016533.17161.ac
https://doi.org/10.1023/b:reac.0000016533.17161.ac