Deactivation study of carbon-supported ruthenium catalyst with potassium promoter

被引：39

作者：

Lin, Bingyu ^{[1
]}

Guo, Yunjie ^{[1
]}

Lin, Jingdong ^{[2
,3
]}

Ni, Jun ^{[1
]}

Lin, Jianxin ^{[1
]}

Jiang, Lilong ^{[1
]}

Wang, Yong ^{[2
,3
,4
]}

机构：

[1] Fuzhou Univ, Sch Chem Engn, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou 350002, Fujian, Peoples R China

[2] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China

[3] Xiamen Univ, Natl Engn Lab Green Chem Prod Alcohols Ethers Est, Xiamen 361005, Peoples R China

[4] Washington State Univ, Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA

来源：

APPLIED CATALYSIS A-GENERAL | 2017年 / 541卷

基金：

中国国家自然科学基金;

关键词：

Deactivation; Carbon-supported Ru catalyst; Potassium; Ammonia synthesis; AMMONIA-SYNTHESIS CATALYSTS; ACTIVE-CARBON; RU CATALYSTS; PLATINUM CATALYSTS; HYDROGEN TREATMENT; GASIFICATION; ALKALI; BARIUM; KINETICS; NITROGEN;

D O I：

10.1016/j.apcata.2017.04.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Carbon-supported Ru catalyst with alkali promoter is arguably the most significant advancement in ammonia synthesis. However, the insufficient stability of this type of catalysts greatly limits their applications, and carbon methanation is often considered as the reason for deactivation. Here we report that there is no clear correlation between carbon methanation and the loss of activity. Rather, carbon oxidation at high temperature, especially via the formation of carbon monoxide, was found to have a strong influence on the activity and stability of Ru catalysts. As a result, there is a significant increase in carbon loss, leading to the sintering of Ru particles and thereby altered hydrogen adsorption. Consequently, catalytic activity and stability of Ru/C catalysts are reduced. This finding contributes to the development of strategies to design carbon-supported metal catalysts with high activity and stability.

引用

页码：1 / 7

页数：7

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