Metal-free catalytic oxidation of benzylic alcohols for benzaldehyde†,Reaction Chemistry & Engineering

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Metal-free catalytic oxidation of benzylic alcohols for benzaldehyde†
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2018-12-07 00:00:00 , DOI: 10.1039/c8re00265g
Zhiyong Wang _{1,

2,

3,

4,

5} , Jie Shi _{1,

2,

3,

4,

5} , Dan Wang _{1,

2,

3,

4,

5} , Yuan Pu _{1,

2,

3,

4,

5} , Jie-Xin Wang _{1,

2,

3,

4,

5} , Jian-Feng Chen _{1,

2,

3,

4,

5}

Affiliation

Sulfurized graphene (SG) was employed as a metal-free catalyst for the liquid-phase catalytic oxidation of benzyl alcohol (BzOH) in the existence of hydrogen peroxide for the first time. The conversion efficiencies of BzOH at different reaction conditions were studied. SG was demonstrated to be among the best metal-free catalysts for this reaction in conversional stirred tank reactors with BzOH conversion of 18.2% (2 mg catalyst, 3 h, T = 80 °C). A high-gravity rotating packed bed reactor was used for process intensification during the metal-free catalytic oxidation, and BzOH conversion increased from 5.56% to 20.86%. Both experimental and computational fluid dynamics simulations indicate that a high-gravity level can provide more turbulent kinetic energy and faster surface renewal rate to improve the catalytic efficiency. This study opened up the possibility of combining metal-free catalysts and high-gravity technology for the green synthesis of chemicals.

中文翻译：

苯甲醇的无金属催化氧化制苯甲醛†

硫化石墨烯（SG）首次在过氧化氢存在下用作苯甲醇（BzOH）液相催化氧化的无金属催化剂。研究了不同反应条件下BzOH的转化效率。在转化搅拌釜反应器中，SG证明是该反应中最好的无金属催化剂之一，BzOH转化率为18.2％（2 mg催化剂，3 h，T= 80°C）。高重力旋转填充床反应器用于无金属催化氧化过程中的工艺强化，BzOH转化率从5.56％提高到20.86％。实验和计算流体动力学仿真均表明，高重力水平可提供更多的湍动能和更快的表面更新速率，以提高催化效率。这项研究开辟了将无金属催化剂与高重力技术结合起来以绿色合成化学品的可能性。

更新日期：2018-12-07

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