Durability Evaluations and Rapid Ageing Methods in Commercial Emission Catalyst Development for Diesel, Natural Gas and Gasoline Applications

被引：12
|
作者：
Maunula, T. [1 ]
Kallinen, K. [1 ]
Savimaki, A. [1 ]
Wolff, T. [2 ]
机构：
[1] Dinex Ecocat Oy, Catalyst Dev, Innovat & R&D, FI-90620 Oulu, Finland
[2] Dinex GmbH, Innovat & R&D, D-97463 Bindlach, Germany
来源：
TOPICS IN CATALYSIS | 2016年 / 59卷 / 10-12期
基金：
欧盟地平线“2020”;
关键词：
Emissions; Catalysts; Deactivation; TWC; DOC; SCR; DPF;
D O I：
10.1007/s11244-016-0588-9
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The ageing conditions were analyzed with gasoline, diesel and natural gas (NG) catalysts to find the simplified, rapid thermal and chemical (sulfur) ageing methods for catalyst development. Rich-stoichiometric conditions prevented the deactivation of TWCs in gasoline and NG applications. Active metals and support are sintered thermally during short lean periods by increasing deactivation as a function of oxygen concentration. Air ageing for 3-10 h is an appropriate rapid ageing method for TWCs. Active regeneration conditions for DPF with a higher carbon concentration deactivated DOCs less than normal diesel exhaust conditions at 700 degrees C. Natural gas oxidation catalysts were sulfated in use conditions but almost complete recovery was possible above 600 degrees C with higher methane feeds at lean. In addition to sulfur, other chemical poisoning was also included in the rapid ageing methods by fittings to the diesel and NG field aged catalysts.
引用
收藏
页码：1049 / 1053
页数：5
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