کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
675181 | 1459612 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Brønsted acid site number evaluation using isopropylamine decomposition on Y-zeolite contaminated with vanadium in a simultaneous DSC–TGA analyzer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Acid-site catalyzed decomposition of isopropylamine was followed in a simultaneous DSC–TGA analyzer. USY zeolite samples with and without vanadium were studied. Results show that acid sites number decreases linearly with vanadium concentration in zeolite indicating that vanadium neutralizes acid sites on catalyst and the metal is able to move on the surface of the solid. The neutralizing species probably contain only one vanadium atom. The reaction enthalpy plus desorption heat of the products show that vanadium preferentially neutralizes the strongest acid sites on the zeolite. The application of the simultaneous DSC–TGA technique to quantify Brønsted acid sites on solids by this reaction is novel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 470, Issues 1–2, 10 April 2008, Pages 36–39
Journal: Thermochimica Acta - Volume 470, Issues 1–2, 10 April 2008, Pages 36–39
نویسندگان
Yonnathan Osorio Pérez, Liliam Alexandra Palomeque Forero, Diana Vanessa Cristiano Torres, Carlos Alexander Trujillo,