A Study of the Preparation of Porous Amorphous Alloys and Their Catalysis

多孔非晶合金的制备及其催化研究

• 批准号: 63470065
• 负责人: YOSHIDA Satohiro
• 金额: $ 4.42万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63470065/
• 关键词: porous amorphous alloy; chemical modification; methanol dehydrogenation; structure change; 表面修飾; メタノール脱水素; 触媒のキァラクタリゼーション

In the series of study on catalysis by amorphous metal alloys, we found that the alloys revealed high turnover frequencies in hydrogenation and/or dehydrogenation reactions. However, the surface area of the alloy is small and the catalytic activity normalized to a unit mass is substantially lower than that of conventional catalysts.In the present study, the enlargement of surface area has been attempted by adopting a technique : doping and leaching of zinc or aluminum. Doping of additional metal is performed by two manners : 1) heating a mixture of zinc or aluminum powder and an amorphous alloy powder, 2) thermal decomposition of zinc formate adsorbed on the surface of alloy powder. The second method is found to be suitable for preparation of porous amorphous alloys with high surface area. For leaching process of the doped metals, a treatment of dilute NaOH solution is found to be suitable. Thus, porous amorphous alloys th surface area of 7-9 m^2 g^<-1> were obtained.These alloys revealed high catalytic activity in hydrogenation of butadiene or dehydrogenation of methanol to methyl formate. Detailed studies on dehydroqenation of methanol by porous Cu-Ti and Cu-Zr catalysts have been carried out to investigate the effects of pretreatments and reaction conditions on the activity and selectivity.

在非晶态合金催化的系列研究中，我们发现非晶态合金在氢化和/或脱氢反应中显示出高的转换频率。然而，该合金的表面积小，催化活性归一化到一个单位质量是显着低于传统的catalysts.In本研究中，已尝试通过采用一种技术：掺杂和浸出的锌或铝的表面积的扩大。添加金属的掺杂通过两种方式进行：1）加热锌或铝粉末与非晶态合金粉末的混合物，2）热分解吸附在合金粉末表面上的甲酸锌。第二种方法适合于制备高比表面积的多孔非晶合金。对于掺杂金属的浸出过程，稀NaOH溶液的处理被发现是合适的。制得了比表面积为7-9 m^2 g^-1的多孔非晶态合金<-1>，这些合金在丁二烯加氢或甲醇脱氢制甲酸甲酯反应中表现出很高的催化活性。对多孔Cu-Ti和Cu-Zr催化剂上甲醇脱氢反应进行了详细的研究，考察了预处理和反应条件对催化剂活性和选择性的影响。

项目成果

Satohiro Yoshida: "METHANOL DEHYDROGENATION OVER AMORPHOUS Cu-Ti ALLOYS OF HIGH SURFACE AREA" Proceedings of the 4th JAPAN-CHINA-U.S.A.Symposium on Catalysis. 80-83 (1989)

Satohiro Yoshida：“高表面积非晶态 Cu-Ti 合金的甲醇脱氢”第四届日本-中国-美国催化研讨会论文集。

Hiromi Yamashita: "Preparation of Skeletal Catalysts by an Extraction of Zinc Metal Doped in the Surface Layer of Amorphous Alloy Powder" J.Materials Science Letters. (1991)

Hiromi Yamashita：“通过提取掺杂在非晶合金粉末表面层的锌金属来制备骨架催化剂”J.Materials Science Letters。

吉田 郷弘: "非晶質合金を材料とする新規金属触媒の開発" 旭硝子工業技術奨励会研究報告. 52. 1-26 (1988)

吉田五郎：“使用非晶合金的新型金属催化剂的开发”旭硝子工业技术振兴协会研究报告52. 1-26 (1988)。

H. Yamashita: "Preparation of Skeletal Catalysts by an Extraction of Zinc Metal Doped in the Surface Layer of Amorphous Alloy Powder" J. Materials Science Letters.

H. Yamashita：“通过提取掺杂在非晶合金粉末表面层的锌金属来制备骨架催化剂”J.材料科学快报。

吉田郷弘: 触媒. 30. 140-143 (1988)

吉田五郎：催化剂。30. 140-143 (1988)