One-Pot Tandem Dehydration–Hydrogenation of Xylose with Formic Acid over Co Catalysts,Industrial & Engineering Chemistry Research

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One-Pot Tandem Dehydration–Hydrogenation of Xylose with Formic Acid over Co Catalysts
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-01-28 , DOI: 10.1021/acs.iecr.9b05726
Ling Xu ₁ , Renfeng Nie ₂ , Haifeng Xu ₁ , Xujie Chen ₁ , Yanchen Li ₁ , Xiuyang Lu ₁

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The transformation of sugars is a sustainable method of production of high value-added chemicals and fuels. Traditional procedures used H₂SO₄ for sugar dehydration, followed by hydrogenation with fossil-derived hydrogen over noble-metal catalysts, which increased the complexity and cost. In this work, formic acid (FA) served as both acid catalyst for dehydration of xylose and hydrogen donor for hydrogenation of the as-formed furfural (FAL) with N-doped carbon-confined Co (Co–N–C) as a catalyst. A high furfuryl alcohol (FOL) yield of 69.5% was accomplished at 160 °C for 5 h. Kinetic studies showed that the apparent activation energy (E_a) over Co–N–C was calculated to be 98.8 kJ/mol. This catalyst was also capable of the one-pot transformation of xylan to FOL and could be reused five times. It is found that the xylose dehydration could be the rate-determining step and coupling xylose dehydration with FAL hydrogenation could accelerate the xylose transformation and the generation of FOL.

中文翻译：

Co催化剂上一锅串联脱水木糖与甲酸加氢反应

糖的转化是生产高附加值化学品和燃料的可持续方法。传统程序使用H ₂ SO ₄进行糖脱水，然后在贵金属催化剂上用化石衍生的氢进行氢化，这增加了复杂性和成本。在这项工作中，甲酸（FA）既用作木糖脱水的酸催化剂，又用作氢掺杂的糠醛（FAL）加氢的碳供体，其中N掺杂的碳限制的Co（Co–N–C）作为催化剂。在160°C下加热5小时，糠醇的高产率为69.5％。动力学研究表明，表观活化能（E _a）在Co–N–C上的计算值为98.8 kJ / mol。该催化剂还能够将木聚糖一锅转化为FOL，可以重复使用五次。发现木糖脱水可能是决定速率的步骤，木糖脱水与FAL加氢结合可以促进木糖的转化和FOL的生成。

更新日期：2020-01-29

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