Mechanical stability of monolithic catalysts: Improving washcoat adhesion by FeCrAl alloy substrate treatment

被引：37

作者：

Wu, Dongfang ^{[1
]}

Zhang, Yanhong ^{[1
]}

Li, Yongdan ^{[2
,3
]}

机构：

[1] Southeast Univ, Sch Chem & Chem Engn, Dept Chem Engn, Nanjing 211189, Jiangsu, Peoples R China

[2] Tianjin Univ, Sch Chem Engn, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin Key Lab Appl Catalysis Sci & Technol, Tianjin 300072, Peoples R China

[3] Tianjin Univ, Sch Chem Engn, State Key Lab Chem Engn, Tianjin 300072, Peoples R China

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2017年 / 56卷

基金：

中国国家自然科学基金;

关键词：

Monolithic catalyst; Monolithic reactor; Metallic monolith; Washcoat adhesion; Mechanical stability; CORDIERITE HONEYCOMB; METALLIC SUPPORTS; ENVIRONMENTAL APPLICATIONS; POWDER CHARACTERISTICS; STRUCTURED CATALYSTS; INTERMEDIATE LAYER; METHANE COMBUSTION; GAMMA-AL2O3; LAYERS; ALUMINA WASHCOATS; COATED MONOLITH;

D O I：

10.1016/j.jiec.2017.07.010

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Alumina-washcoated FeCrAl alloy sheets are prepared to investigate the effects of metallic substrate pretreatments on the mechanical stability of monolithic catalysts. It is shown that chemical and thermal pretreatments produce different effects on the metallic surface morphology and phase, and different mechanisms are involved in their ways of improving the washcoat adhesion. Combination of chemical and thermal pretreatments leads to the formation of alpha-alumina whiskers on corroded and rough metallic surface, thus giving the most satisfactory washcoat adhesion. It is also pointed out that not only mechanical shock resistance but also thermal shock resistance is crucial to metallic monolithic catalysts. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：175 / 184

页数：10

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