Preparation of Highly Active Ceramics Catalysts by Chemical Vapor Deposition for Catalytic Combustion

化学气相沉积法制备催化燃烧高活性陶瓷催化剂

基本信息

批准号：
63850168
负责人：
MISONO Makoto
金额：
$ 6.02万
依托单位：
Faculty of Engineering The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental 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

项目摘要

In catalytic combustion processes, development of highly active and thermally stable ceramics catalyst is desired. In the present study, the preparations of supported mixed oxide catalysts mainly by Chemical Vapor Deposition (CVD) and Chemical Liquid Deposition (CLD) methods were tried. The results are summarized as follows :(1) Highly Dispersed LaCoO_3/ZrO_2 prepared by Chemical Liquid Deposition (CLD)LaCoO_3 highly dispersed ZrO_2 was prepared by impregnating ZrO_2 with aqueous solutions of the mixtures of La and Co acetates. The high dispersion was confirmed by IR, XRD, and TEM. This catalyst showed a very high catalytic activity for complete oxidation of propane.(2) Vanadium Oxide This Film Catalysts Prepared by CVDHighly dispersed vanadium oxide overlayers were formed on SiO_2 by CVD of VO (c_2H_5)_3 as was confirmed by XPS and XRD. Furthermore, EXAFS and XANES analyses revealed that the V_2O_5 were present as thin films. This catalyst was much more active than V_2O_5 prepared by an impregnation method for oxidative dehydrogenation of a alcohol.(3) Highly Active CoO_X Dispersed on ZrO_2 Prepared by Low-Temperture Oxygen plasmaCo (OCOCH_3)_2 dispersed on ZrO_2 was treated with oxygen which was activated in Ar-plasma.It was confirmed by infrared spectroscopy that all Co (OCOCH_3)_2 were changed to CoO_X by this treatment. This catalyst showed activities for the complete oxidation of propane much greater than Pt/Al_2O_3 and La_<0.8>Sr_<0.2>coO_3 which were reported to be excellent oxidation catalysts.These results demonstrate that CLD, CVD and utilization of oxygen-plasma were superior methods to prepare oxide-thin films on supports, which posses high catalytic performance for the catalytic combustion.

在催化燃烧过程中，需要开发高度活性和热稳定的陶瓷催化剂。在本研究中，尝试使用化学蒸气沉积（CVD）和化学液体沉积（CLD）方法的支持混合氧化物催化剂的制剂。结果总结如下：（1）通过化学液体沉积（CLD）LACOO_3制备的高度分散的LACOO_3/ZRO_2 LACOO_3高度分散的Zro_2是通过用LA和Co乙酸盐的混合物浸入Zro_2来制备的。 IR，XRD和TEM证实了高分散体。该催化剂显示出非常高的催化活性，可完全氧化丙烷。（2）氧化钒该薄膜催化剂由CVDHigh分散的氧化钒叠加剂在SIO_2上形成了VO（C_2H_5）_3的CVD在SIO_2上形成，XPS和XPS和XRD证实。此外，EXAFS和XANES分析表明，V_2O_5作为薄膜存在。该催化剂比通过浸渍方法制备的V_2O_5要活跃得多，用于氧化脱氢的酒精化。（3）通过低热量permaCo（Ococh_3）在ZRO_2上分散在Zro_2上的高度活跃的COO_X，均在Zro_2上均分散在acro_2上，以使其在氧气中分散，从而在Ar-avygen中均在AR-AR-ARCAMERISIT中进行了cariversiistion，该杂志是在AR-AR-ARCAMISCER中。通过这种处理，CO（OCOCH_3）_2将其更改为COO_X。 This catalyst showed activities for the complete oxidation of propane much greater than Pt/Al_2O_3 and La_<0.8>Sr_<0.2>coO_3 which were reported to be excellent oxidation catalysts.These results demonstrate that CLD, CVD and utilization of oxygen-plasma were superior methods to prepare oxide-thin films on supports, which posses high catalytic performance for the catalytic combustion.