Differences of Short Straight-Chain Monoalcohols in the Value-Added Conversion of Furfural Catalyzed by Zr3Al1-MMO: Effect of Hydroxyl Position and Carbochain Length,ACS Sustainable Chemistry & Engineering

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Differences of Short Straight-Chain Monoalcohols in the Value-Added Conversion of Furfural Catalyzed by Zr3Al1-MMO: Effect of Hydroxyl Position and Carbochain Length
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-09-12 , DOI: 10.1021/acssuschemeng.1c04702
Lei Ye ₁ , Yiwen Han ₁ , Jiaran Xi ₁ , Xiaotong Wang ₁ , Xuebin Lu _{1,

2}

Affiliation

We synthesized a catalyst of zirconium–aluminum bimetallic oxides (Zr₃Al₁-MMO) by microwave and investigated the effect of alcohol solvents on furfural valorization. Zr₃Al₁-MMO had high catalytic activity under mild conditions (80–140 °C). The hydroxyl position of the alcohol sources had a decisive influence on the reaction type. Furfural would condense with the primary alcohols to form high-carbon compounds, and the secondary alcohols prefer to act as a hydrogen donor to promote the transfer hydrogenation process to produce furfuryl alcohol. As the length of the carbon chain of alcohol solvent increased, both types of reactions showed a decrease in yield, which can be attributed to solvent polarity and steric hindrance. Reaction kinetics results verified the above conclusions. Combined with characterization results, we believed that the acid–base sites provided by the zirconium, aluminum, and oxygen vacancies in the catalyst were the main active sites. Through stability and recyclable experiments, Zr₃Al₁-MMO further confirmed its potential for industrial applications.

中文翻译：

Zr3Al1-MMO催化糠醛增值转化中短直链一元醇的差异：羟基位置和碳链长度的影响

我们通过微波合成了锆铝双金属氧化物 (Zr ₃ Al ₁ -MMO)催化剂，并研究了醇溶剂对糠醛增值的影响。锆₃铝₁-MMO 在温和条件下（80-140°C）具有高催化活性。醇源的羟基位置对反应类型有决定性影响。糠醛会与伯醇缩合形成高碳化合物，仲醇更喜欢作为氢供体促进转移氢化过程以产生糠醇。随着醇溶剂碳链长度的增加，两种类型的反应都显示出产率下降，这可归因于溶剂极性和空间位阻。反应动力学结果验证了上述结论。结合表征结果，我们认为催化剂中锆、铝和氧空位提供的酸碱位点是主要的活性位点。通过稳定性和可回收性实验，Zr₃ Al ₁ -MMO 进一步证实了其工业应用的潜力。

更新日期：2021-10-04

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