Efficient hydrogenation of diethyl oxalate to mono-ethylene glycol using Cu/SiO2 catalyst

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society Pub Date : 2024-02-29 DOI:10.1016/j.jics.2024.101136

Nikhil K. Gor , Praveen Kumar Chinthala , P. Unnikrishnan , Asit Das , Prakash D. Vaidya

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Abstract

The economics of the hydrogenation process is driven by the cost of hydrogen (H₂) and the amount of H₂ required for the process. Diethyl oxalate (DEO) hydrogenation to mono-ethylene glycol (MEG) is hitherto extensively studied at a very high H₂ to diethyl oxalate (H₂/DEO) ratio. The objective of this study was to investigate DEO to MEG hydrogenation reaction at significantly lower values of H₂/DEO ratio. The Cu/SiO₂ catalyst synthesized by the deposition-precipitation method was used in the present work. The characterization of this catalyst suggested high values of the surface area and pore volume and small pore diameter. The catalyst comprised well-dispersed and nano-sized particles. Upon reduction, the presence of Cu⁺ and Cu⁰ sites which are necessary for the reaction, was evident. The parametric study was performed at optimized conditions with an H₂/DEO ratio as low as 25. DEO conversion was 84% and MEG selectivity was 62%.

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使用 Cu/SiO2 催化剂将草酸二乙酯高效氢化为单乙二醇

氢化工艺的经济性取决于氢气（H2）的成本和工艺所需的 H2 量。迄今为止，对草酸二乙酯 (DEO) 加氢制单乙二醇 (MEG) 的广泛研究都是在 H2 与草酸二乙酯 (H2/DEO) 比率非常高的条件下进行的。本研究的目的是探讨在 H2/DEO 比值明显较低的条件下 DEO 加氢制 MEG 的反应。本研究采用沉积沉淀法合成的 Cu/SiO2 催化剂。催化剂的表征表明，该催化剂的表面积和孔隙体积较大，孔径较小。催化剂由分散良好的纳米级颗粒组成。还原时，反应所需的 Cu+ 和 Cu0 位点明显存在。参数研究是在 H2/DEO 比率低至 25 的优化条件下进行的。DEO 转化率为 84%，MEG 选择性为 62%。

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来源期刊

Journal of the Indian Chemical Society 化学-化学综合

CiteScore

3.50

自引率

7.70%

发文量

492

审稿时长

3-8 weeks

期刊介绍： The Journal of the Indian Chemical Society publishes original, fundamental, theorical, experimental research work of highest quality in all areas of chemistry, biochemistry, medicinal chemistry, electrochemistry, agrochemistry, chemical engineering and technology, food chemistry, environmental chemistry, etc.