کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
40555 45858 2013 8 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Ceria calcination temperature influence on acetic acid ketonization: Mechanistic insights
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
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Ceria calcination temperature influence on acetic acid ketonization: Mechanistic insights
چکیده انگلیسی

The ketonization of carboxylic acids is an attractive method of removing undesirable acidity and oxygen from precursors to biorenewable fuels. However, to be more industrially relevant the ketonization reaction temperature needs to be lowered. Unfortunately, ketonization is not fully understood making this task more challenging. In this work, it was found that the calcination temperature changes the type of interactions that a good ketonization catalyst, cerium oxide, has with the model biomass bio-oil compound acetic acid. Through extensive pre- and post reaction characterization the calcination temperature is determined to influence catalyst final morphology, crystallinity, and oxidation state. Differences in acid, base and redox properties for the ceria calcined at different temperatures did not correlate with the catalytic performance. The crystallinity of the starting ceria, as controlled by the calcinations temperature, was found to dictate whether the reaction proceeds through a bulk or a surface catalyzed mechanism.

Figure optionsDownload high-quality image (119 K)Download as PowerPoint slideHighlights
► Ceria catalyzed acetic acid ketonization in the condensed phase.
► Ceria calcination temperature influenced the ketonization reaction.
► Bulk and surface routes are likely proceeding through the same mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 451, 31 January 2013, Pages 86–93
نویسندگان
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