Cu/SiO2 Catalysts Prepared by the Sol-Gel Method for Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

Lin, Ling; Pan, Pengbin; Zhou, Zhangfeng; Li, Zhaoji; Yang, Jun; Sun, Minling; Yao, Yuan‐Gen

doi:10.1016/s1872-2067(10)60223-9

Cited by 47 publications

(29 citation statements)

References 33 publications

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“…[50] Thirdly, the effect of Cu loading on the catalytic performance of Cu-based catalyst was investigated. [42,44] The results show that the catalytic activity increases with the increasing of the copper loading, but much higher copper content in the catalysts will lead to the aggregation of the copper particles and cause the deactivation of the catalysts. [42] The optimal Cu loading was 15.6%, which exhibited the best catalytic performance.…”

Section: Synthesis Methodsmentioning

confidence: 98%

“…[42,44] The results show that the catalytic activity increases with the increasing of the copper loading, but much higher copper content in the catalysts will lead to the aggregation of the copper particles and cause the deactivation of the catalysts. [42] The optimal Cu loading was 15.6%, which exhibited the best catalytic performance. [28] The formation of copper phyllosilicate is observed to be related to the Cu loading.…”

Section: Synthesis Methodsmentioning

confidence: 98%

“…Various methods are developed to prepare Cu-based catalysts, such as the traditional impregnation method, [37,38] the deposition-precipitation method, [39][40][41] and the sol-gel method, [42] the selective leaching of Cucontaining alloy, [35] and the calcination of layered double hydroxide (LDH) precursor. [43] For the typical deposition-precipitation method, the Cu species are deposited on the supports by the help of some reagents, such as ammonia, [39] urea, [44] (NH 4 ) 2 CO 3 , [45] etc.…”

Section: Synthesis Methodsmentioning

confidence: 99%

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New Catalysts for Coal to Ethylene Glycol

Wang

Peng

et al. 2017

Chin. J. Chem.

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Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences has achieved the industrialization of the first generation catalysts for coal to ethylene glycol for the first time in 2009. However, there are still lots of aspects to be improved, such as high noble metal loading and toxic Cr in catalyst of ester hydrogenation. To improve the catalysts, we have done systematic deep research about the nanostructures of catalysts, and revealed facet effect, size effect, synergistic effect, support effect, and so on. A series of catalysts preparation technologies have been developed to achieve the efficient utilization of noble metals. The Pd loadings of dehydrogenation catalyst and CO oxidative coupling catalyst have been dropped from 2.5% to 0.9% and 2.0% to 0.13%, respectively, while the catalytic performances are enhanced greatly. The toxic Cu-Cr in ester hydrogenation catalyst has been upgraded to green Cu-Si. The new catalysts for coal to ethylene glycol with advancement have been successfully developed with independent intellectual property rights.

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Section: Synthesis Methodsmentioning

confidence: 98%

Section: Synthesis Methodsmentioning

confidence: 98%

Section: Synthesis Methodsmentioning

confidence: 99%

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New Catalysts for Coal to Ethylene Glycol

Wang

Peng

et al. 2017

Chin. J. Chem.

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“…The sample obtained by ammonia evaporation technique using the ammonia stabilized silica sol (20Cu-AS30-AE-fresh) displays less evident peaks, signifying less crystallinity compared with the other two samples. The large peak centered near 23 • can be assigned to poorly crystalized SiO 2 structures [21,24,39]. All three samples display this peak, while the rest of the larger peaks displayed by the samples can be assigned to CuO (tenorite) [21,24,39] and some small peaks can be assigned to copper silicates [10].…”

Section: Characteristics Of the Catalystsmentioning

confidence: 99%

“…However, this method generates less active catalysts, due to large distributions of the copper particles [17] and Cu particles agglomeration at higher loading [18]. -Sol-gel methods give active catalysts, but they tend to be slow, sensitive to other influences [24,25], and preparation methods are complex, reducing reproducibility [18]. -Cationic exchange methods [17] and chemisorption hydrolysis [26] leading to only 11-12 wt.% Cu loading.…”

Section: Introductionmentioning

confidence: 99%

An environmentally benign and low-cost approach to synthesis of thermally stable industrial catalyst Cu/SiO2 for the hydrogenation of dimethyl oxalate to ethylene glycol

Popa

Jin

Fan

2015

Applied Catalysis A: General

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a b s t r a c tThis investigation focused on developing an environmentally benign approach to synthesis of nanostructured Cu/SiO 2 catalysts for hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG). It was accomplished by using (NH 4 ) 2 CO 3 , instead of the conventional ammonia evaporation method, for making nanostructured Cu/SiO 2 exhibiting good performance for DMO conversion and EG selectivity in the desired temperature range, with increased temperature stability. The resulting catalysts were characterized for catalytic activity, optimal reaction temperature, specific surface area, crystalline structure, surface composition and the influence of sodium in support raw material. The new method generated active catalysts with improved thermal stability linked to better dimension control and more Cu 2 O content, together with improved morphology of the supported copper particles.

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A CFD simulation study to evaluate the flow and catalytic hydrogenation of dimethyl oxalate in a packed bed, a two‐stage fluidized bed, and a circulating fluidized bed

Zhu

Xiao

Luo

2013

Asia-Pacific J Chem Eng

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Hydrogenation of dimethyl oxalate (DMO) can be operated in various reactors, such as the packed bed (PB), two‐stage fluidized bed (TSFB), and circulating fluidized bed (CFB) reactors. Fluid dynamic behaviors in these reactors are different and can lead to different transport and reaction behaviors. Recent advances in the computational fluid dynamics (CFD) technique show its great potential in advancing current understanding of fluid dynamics and its interactions with chemical reaction dynamics. In this study, CFD models for the simulations of flow and hydrogenation of Diethyl Oxalate (DEO) in PB, TSFB, and CFB reactors were developed. The CFD model for the PB reactor was validated using experimental data. The models were then used to predict flow and hydrogenation behaviors in the other two reactors. Various critical issues to be considered in choosing a reactor and how CFD modeling can be utilized to reduce uncertainties associated with this are discussed in details. The approach, models, and results presented here will be useful for understanding the complex flow dynamics and its interaction with the reaction dynamics of DMO hydrogenation in various types of reactors. © 2013 Curtin University of Technology and John Wiley & Sons, Ltd.

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Cu/SiO2 Catalysts Prepared by the Sol-Gel Method for Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

Cited by 47 publications

References 33 publications

New Catalysts for Coal to Ethylene Glycol

New Catalysts for Coal to Ethylene Glycol

An environmentally benign and low-cost approach to synthesis of thermally stable industrial catalyst Cu/SiO2 for the hydrogenation of dimethyl oxalate to ethylene glycol

A CFD simulation study to evaluate the flow and catalytic hydrogenation of dimethyl oxalate in a packed bed, a two‐stage fluidized bed, and a circulating fluidized bed

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