کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7062412 1459519 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermogravimetric evolved gas analysis of urea and urea solutions with nickel alumina catalyst
ترجمه فارسی عنوان
تجزیه و تحلیل گاز تکمیل شده از ترموگرامتری از محلول اوره و اوره با کاتالیزور آلومینای نیکل
کلمات کلیدی
هیدروژن، اوره، کاتالیزور آلومینای نیکل، تجزیه و تحلیل گرمایی همزمان،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Thermal decomposition of urea, and aqueous urea solutions, in the presence of 18 wt % nickel on alumina was studied by thermogravimetric analysis. A range of evolved gas species (a wider range than reported previously) were monitored by mass spectroscopy, with the evolved gases also analysed using FTIR. Results supported previous evidence of major urea decomposition starting ca. 133 °C, though a previously unreported two stage evolution was detected by MS in the first episode. For aqueous urea solutions, at temperatures from 80 °C, evolution of nitrogen was observed, along with a simultaneous release of some NH3 and what was considered to be H2 (by the detection of a m/z = 2 ion). Activity of nickel alumina catalyst for H2 steam reforming could not be discerned by this method, though its influence was apparent by differing evolution profiles of HCN, and NH3 in comparison to uncatalysed samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 565, 10 August 2013, Pages 39-45
نویسندگان
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