P-modified γ -Al2O3/α -Al2O3 Foams with High Porosity as Palladium-Catalyzed Carriers

被引：0

作者：

Yulin, Wei ^{[1
]}

Guopu, Shi ^{[1
]}

Sique, Chen ^{[1
]}

Hailing, Yang ^{[1
]}

Jun, Ji ^{[1
]}

Yingying, Chen ^{[1
]}

Xinyu, Li ^{[1
]}

Deli, Ma ^{[1
]}

Baocai, Pan ^{[1
]}

Zhenyu, Zhang ^{[1
]}

Honglei, Wang ^{[2
]}

机构：

[1] School of Materials Science and Engineering, University of Jinan, Jinan,250022, China

[2] Anhui Dexinjia Biopharm Co., Ltd, Fuyang,236600, China

来源：

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2023年 / 52卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Alumina - Aluminum oxide - Catalysis - Catalysts - Palladium - Porosity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A novel method for the preparation of α-alumina foams with P-γ-Al2O3 modified coating for the palladium catalysts was proposed. The polyurethane template method was used and the preparation parameters were optimized. The apparent porosity of the ceramic foam is 90.28%, the bulk density is 0.45 g·cm−3, and the strength of ceramic foam is satisfying. The P-modified γ-Al2O3 coating was prepared on the α-alumina foam, and then the active catalytic phase (Pd) was loaded by ultrasound-assisted impregnation. Results show that the P-containing coating increases the surface area and weakly acidic sites of the inert foam while decreasing the proportion of strongly acidic sites. Compared with the uncoated foam, the foam with modified coating can easily load the active phase. In addition, the loaded Pd metal can hardly be oxidized, and the catalytic conversion temperature (T50, T90) of CO reduces by about 50 °C. This research presents the great practical potential of low-cost modified α-Al2O3 ceramic foams in the palladium catalyst production. Copyright © 2023, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.

引用

页码：87 / 94