کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610180 | 47163 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Automotive catalyst deactivation: Case studies
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The study of automotive catalyst deactivation is associated with technical, economic and environmental problems. The deactivation phenomenon has different origins that can be divided into three groups: thermal, chemical and mechanical deactivation. In this work, nine commercial catalysts were analyzed, seven of them aged in an engine bench. A study using scanning electron microscopy (SEM) with energy-dispersive X-ray analysis (EDS) at different positions of the monolith allowed the probable reasons for catalyst deactivation to be inferred. Thermal deactivation was a common cause for most of the samples. Other mechanisms such as washcoat losses or abrasion, contamination by sulfur and lubricants, and noble metal sintering were also observed for different samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 157-167
Journal: Catalysis Today - Volumes 107â108, 30 October 2005, Pages 157-167
نویسندگان
Fatima Maria Zanon Zotin, Otávio da Fonseca Martins Gomes, Cristiano Honório de Oliveira, Arnaldo Alcover Neto, Mauri José Baldini Cardoso,