检索结果-南通市图书馆

Journal of Advanced Ceramics 2015年第2期4卷 111-117页

作者： nobuhito imanaka Toshiyuki MASUI Kazuya JYOKO Department of Applied Chemistry Faculty of EngineeringOsaka University2-1 YamadaokaSuitaOsaka 565-0871Japan

Partial oxidation of cyclohexane into cyclohexanone and cyclohexanol(KA-oil)is an industrially significant reaction for producing precursors for the synthesis ofε-caprolactam and adipic acid,which are the building blocks of ***,to date,the cyclohexane conversion ratio has usually been limited to less than 6%to prevent further oxidation of the cyclohexanol and cyclohexanone *** this study,we report that Pt/CeO_(2)-ZrO_(2)-SnO_(2)/SiO_(2),in which CeO2-ZrO2-SnO2 provide reactive oxygen molecules from inside the bulk,can act as efficient *** of the catalyst composition and reaction conditions provided a cyclohexane conversion ratio of 24.1%and a total selectivity for cyclohexanol and cyclohexanone of 83.4%at 130℃in 0.5 MPa(4.9 atm)air for 7 h over a 5wt%Pt/16wt%Ce_(0.68)Zr_(0.17)Sn_(0.15)O_(2.0)/SiO_(2)*** catalyst has significant advantages over conventional catalysts because the reaction proceeds at a lower pressure,and there is no need for toxic radical initiators or free-radical scavengers.

关键词： composite materials oxidation cyclohexane KA-oil catalyst

Research trends in rare earths: A preliminary analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2010年第6期28卷 843-846页

作者： Gin-ya Adachi nobuhito imanaka Shinji Tamura Juri Educational Institute and Department of Applied Chemistry Osaka University

The research trend in rare earths has been studied using the Chemical Abstracts (CA) data. The number of papers published from China has been increasing very rapidly since 2001 and today China is the top country in terms of paper contribution on rare earths. This article presents a comparative study of R&D trends among China, Japan and USA.

关键词： research trends publication trend paper number citation count research funds

Novel environmentally friendly inorganic red pigments based on calcium bismuth oxides

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2015年第1期4卷 39-45页

作者： WENDUSU Tetsuro YOSHIDA Toshiyuki MASUI nobuhito imanaka Department of Applied Chemistry Faculty of EngineeringOsaka University2-1 YamadaokaSuitaOsaka 565-0871Japan

Novel environmentally friendly inorganic red pigments based on calcium bismuth oxide Ca3(Bi1-xREx)8O15(0≤x≤0.09;RE=Sc^(3+),Er^(3+),Y^(3+),Ho^(3+)and Dy^(3+)),were successfully synthesized and the color properties were *** color of these pigments depended on the composition and the synthesis condition,and the most vivid red color was obtained for the Ca3(Bi0.93Y0.07)8O15 sample calcined thrice at 800℃for 2 *** L*and a*values corresponding to brightness and red chromaticity for this pigment were 45.6 and+30.6,respectively,which were greater than those of a commercially available Fe2O3 pigment(L^(*)=38.4,a^(*)=+29.5).Since the present pigment is composed of nontoxic and safe elements,it should be an attractive alternative to the conventional Fe2O3 pigment.

关键词： calcium bismuth oxide environmentally friendly red pigment solid solution cation complexation method

Catalytic liquid-phase oxidation of acetaldehyde to acetic acid over a Pt/CeO_2–ZrO_2–SnO_2/γ-alumina catalyst

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第10期27卷 63-66页

作者： Pil-Gyu Choi Takanobu Ohno Toshiyuki Masui nobuhito imanaka Department of Applied Chemistry Faculty of EngineeringOsaka University

Pt/CeO2–ZrO2–SnO2/γ-Al2O3 catalysts were prepared by co-precipitation and wet impregnation methods for catalytic oxidation of acetaldehyde to acetic acid in water. In the present catalysts, Pt and CeO2–ZrO2–SnO2 were successfully dispersed on the γ-Al2O3 *** of platinum content and reaction time on the selective oxidation of acetaldehyde to acetic acid were investigated to optimize the reaction conditions for obtaining both high acetaldehyde conversion and highest selectivity to acetic acid. Among the catalysts, a Pt（6.4 wt.%）/Ce0.68Zr0.17Sn0.15O2.0（16 wt.%）/γ-Al2O3 catalyst showed the highest acetaldehyde oxidation activity. On this catalyst, acetaldehyde was completely oxidized after the reaction at 0°C for 8 hr, and the selectivity to acetic acid reached to 95%and higher after the reaction for 4 hr and longer.

关键词： Liquid-phase oxidation Acetaldehyde Rare earths Catalyst

Catalytic liquid phase oxidation of 1,4-dioxane over a Pt/CeO_(2)-ZrO_(2)-Bi_(2)O_(3)/SBA-16 catalyst

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2015年第1期4卷 71-75页

作者： Pil-Gyu CHOI Takanobu OHNO Nashito FUKUHARA Toshiyuki MASUI nobuhito imanaka Department of Applied Chemistry Faculty of EngineeringOsaka University2-1 YamadaokaSuitaOsaka 565-0871Japan

A Pt/CeO_(2)-ZrO_(2)-Bi_(2)O_(3)/SBA-16(Santa Barbara Amorphous No.16)catalyst was prepared by hydrothermal and wet impregnation methods for catalytic purification of 1,4-dioxane in ***-16 has a number of mesopores and the average size of the pores is 9.4 *** the present catalyst,platinum and CeO_(2)-ZrO_(2)-Bi_(2)O_(3)were successfully dispersed in the pores of the SBA-16 support,and the temperature dependence of the liquid phase oxidation of 1,4-dioxane was *** oxidation reaction proceeded effectively in the air atmosphere in the temperature range of 40-80℃.

关键词： composite materials oxidation porous materials 1,4-dioxane catalyst

Direct Decomposition of NO into N2and O2Over C-type Cubic Y2O3-Tb4O7-ZrO2

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Materials Sciences and Applications 2012年第10期3卷 733-738页

作者： Toshiyuki Masui Shunji Uejima Soichiro Tsujimoto nobuhito imanaka Department of Applied Chemistry Faculty of Engineering Osaka University 2-1 Yamadaoka Suita Osaka Japan

Catalytic activities for direct NO decomposition were investigated over C-type cubic Y2O3–Tb4O7–ZrO2 prepared by a coprecipitation method. The NO decomposition activity was enhanced by partial substitution of the yttrium sites with terbium in a (Y0.97Zr0.03)2O3.03 catalyst, which shows high NO decomposition activity. Among the catalysts synthesized in this study, the (Y0.67Tb0.30Zr0.03)2O3.33 catalyst exhibited the highest NO decomposition activity;NO conversion to N2 was as high as 67% at 900℃ in the absence of O2 (NO/He atmosphere), and a relatively high conversion ratio was observed even in the presence of O2 or CO2, compared with those obtained over conventional direct NO decomposition catalysts. These results indicate that the C-type cubic Y2O3–Tb4O7–ZrO2 catalyst is a new potential candidate for direct NO decomposition.

关键词： Nitrogen Monoxide Direct Decomposition Catalyst Rare Earth Oxide C-type Cubic Structure