Selective hydrogenation by highly-dispersed and highly-loaded noble metallic nanoparticulate catalysts

高分散、高负载贵金属纳米颗粒催化剂的选择性加氢

基本信息

批准号：
12650773
负责人：
MURAMATSU Atsushi
金额：
$ 2.62万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

In the present study, first of all, the preparation method was established and then as-prepared catalysts were tested for industrial use. In the first year, in order to establish the selective deposition technique onto the support particles, the research project on the selective deposition of metallic nanoparticles, such as Ru, Rh, Pd, Ir, and Pt from, its solution was investigated. Namely, first of all, target complexes of metal, such as Ru, Rh, Pd, Ir, and Pt, was prepared in the solution phase under the precise control of conditions, mainly pH, in order to form their oxide or hydroxide selectively on surfaces of the support particles. In the next, noble metal hydroxide was selectively generated on the solid surfaces by dispersing and aging support powders, such as monodispersed particles of titania, hematite, and silica. Finally, metallic noble nanoparticles were formed by the hydrogen reduction. In the second year, based on the results obtained in the first year, application of noble nanoparticles as a catalyst was mainly investigated. First of all, the activity of hydrogenation of 1-octent to octane was investigated. As-prepared noble nanoparticulate catalysts were compared with a conventional catalyst in this regard. From this point of view, our catalyst exhibited remarkably high activity for the hydrogenation. Hereafter, the selectivity of the catalysts was tested. Taking it into the consideration that nonporous support powders were used in the present study, the hydrogenation of benzene to cyclohexene was tested as an example of successive hydrogenation reaction. Finally, CO hydrogenation to form organic compounds was investigated over the noble nanoparticulate catalysts prepared by the present method.

在本研究中，首先，建立了制备方法，然后测试了准备做准备的催化剂以进行工业用途。在第一年，为了在支持粒子上建立选择性沉积技术，研究了有关金属纳米颗粒的选择性沉积的研究项目，例如来自RU，RH，RH，PD，IR和PT的研究项目，研究了其溶液。也就是说，首先，在条件的精确控制下（主要是pH），在溶液相中制备了金属的靶络合物，例如RU，RH，PD，IR和PT，以选择在支撑颗粒的表面上形成其氧化物或羟基。接下来，通过分散和衰老的支撑粉，例如钛，赤铁矿和二氧化硅的单分散颗粒，在实心表面上有选择地生成高贵的金属氢氧化物。最后，金属贵族纳米颗粒是由氢还原形成的。在第二年，根据第一年获得的结果，主要研究了贵族纳米颗粒作为催化剂的应用。首先，研究了1氧对辛烷值的氢化活性。在这方面，将预先准备的贵族纳米纳米催化剂与常规催化剂进行了比较。从这个角度来看，我们的催化剂在氢化中表现出极高的活性。此后，测试了催化剂的选择性。考虑到本研究中使用了非孔支撑粉，将苯与环己烯的氢化作为连续氢化反应的一个例子进行了测试。最后，研究了通过本方法制备的贵族纳米催化剂，研究了形成有机化合物的CO氢化。