کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6453282 1418507 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficient green catalysis for the conversion of fructose to levulinic acid
ترجمه فارسی عنوان
کاتالیزور سبز کارآمد برای تبدیل فروکتوز به اسید لووولینیک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


- Demonstration of fructose to levulinic acid with very high activity and selectivity using Dowex 50 × 8-100 resin.
- We obtained an efficient system capable to produce the transformation under benign conditions.
- This work provides more flexibility than dual catalyst systems reported previously, behaving as a switchable catalyst for LA and HMF production depending on the nature of solvent.
- Mechanistic insight provided on the formation of by-products leading to humins, the primary catalyst fouling mechanism for this reaction.

Highly efficient and selective production of levulinic acid has been achieved from D-fructose in the presence of polystyrene-based sulphonic acid resin catalyst, Dowex 50 × 8-100, at mild reaction conditions of 120 °C, over 24 h in a 50:50 mixture of water/GVL resulting in 72 mol% yield under optimized reaction conditions. Optimization of the effect of reaction temperature, time, pressure, catalyst to substrate ratio, fructose concentration and solvent was performed. Various polystyrene-based sulfonic acid resins were also investigated for quantitative production of LA from 5-hydroxymethylfurfural (5-HMF) in pure water. Catalyst recycling was carried out up to 6 cycles. Significant mechanistic information was obtained for the formation of “humins”, which are the primary cause of catalyst fouling, by the identification of soluble by-products and polymerization presursors using Q-Tof mass spectrometry based on accurate masses.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 539, 5 June 2017, Pages 70-79
نویسندگان
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