کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
63632 48245 2016 9 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Carbon dioxide uptake as ammonia and amine carbamates and their efficient conversion into urea and 1,3-disubstituted ureas
ترجمه فارسی عنوان
جذب دی اکسید کربن به عنوان آمونیاک و آمین کربامات و تبدیل کارایی آنها به اوره و اوره های 1،3-دی اکسیدکربن
کلمات کلیدی
ضبط و استفاده از CO2؛ تولید اوره؛ 1،3-اوره جایگزین ؛ تبدیل کاربامات
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Captured CO2 from a flue gas as raw material for the production of valuable chemicals.
• Efficient CO2 capture by ammonia and amines as carbamates in the solid state.
• Identification of ammonia and amine carbamates by 13C NMR spectroscopy.
• Thermal conversion of solid mixtures of ammoniun carbamate and bicarbonate into urea.
• Thermal conversion of solid amine carbamates into 1,3-disubstituted ureas.

Solid mixtures of ammonium carbamate and bicarbonate originating from the CO2 capture by NH3 in water–ethanol solution were converted into urea by heating to 428 K for 60–90 min. The yield of urea was up to 53% on molar basis. An analogous technique was employed to capture CO2 with 1-aminobutane, 1-amino-2-methylpropane, 2-amino-2-methylpropane, 1-aminooctane, aminocyclohexane and 1,4-diazacyclohexane, in organic solvents as amine carbamates which were separated in the solid state and thermally converted at 423 K for 15–16 h into 1,3-disubstituted ureas with 30–40% yield on molar scale. The formation of 1,3-disubstituted ureas was 100% selective. The rate of the conversion reaction was significantly improved in the presence of copper catalysts. The identification and quantification of the products in the reaction mixtures were obtained by 13C NMR analysis.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 13, March 2016, Pages 81–89
نویسندگان
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