Effect of copper loading on texture, structure and catalytic performance of Cu/SiO2 catalyst for hydrogenation of dimethyl oxalate to ethylene glycol

Zhang, Bo; Hui, Shengguo; Zhang, Suhua; Ji, Yang; Li, Wei; Fang, Dingye

doi:10.1016/s1003-9953(11)60405-2

Cited by 60 publications

(47 citation statements)

References 31 publications

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“…As a reference, the profile of a bulk CuO sample is also shown in the figure. For the MDD sample, two types of CuO can be distinguished: a phase of copper-oxo-cations indicated by the peak centered at 200 • C and the well-dispersed copper oxide species at 215 • C [34,35]. Moreover, the fact that no reduction activity is visible above 300 • C suggests the absence of bulk CuO, in line with the observation from its XRD pattern.…”

Section: Copper Oxide Dispersionsupporting

confidence: 56%

Comparison between a Water-Based and a Solvent-Based Impregnation Method towards Dispersed CuO/SBA-15 Catalysts: Texture, Structure and Catalytic Performance in Automotive Exhaust Gas Abatement

et al. 2016

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Supported copper oxide nanoparticles are a potential candidate for replacing the rare and expensive precious metals within the automotive three-way catalyst. However, a well-designed dispersion method is necessary to allow a stable high loading of active material, compensating its lower intrinsic activity and stability. In this work, a CuO-loaded SBA-15 catalyst has been manufactured by two methods. The ammonia-driven deposition precipitation (ADP) and the molecular designed dispersion (MDD) methods are both considered as efficient deposition methods to provide well-dispersed copper oxide-based catalysts. Their morphology, copper dispersion and the chemical state of copper were characterized and compared. Due to the differences in the synthesis approach, a difference in the obtained copper oxide phases has been observed, leading to a distinct behavior in the catalytic performance. The structure-activity correlation of both catalysts has also been revealed for automotive exhaust gas abatement. Results demonstrate that various copper species can be formed depending on the precursor-support interaction, affecting selectivity and conversion during the catalytic reaction.

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Section: Copper Oxide Dispersionsupporting

confidence: 56%

Comparison between a Water-Based and a Solvent-Based Impregnation Method towards Dispersed CuO/SBA-15 Catalysts: Texture, Structure and Catalytic Performance in Automotive Exhaust Gas Abatement

et al. 2016

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“…The large BET surface area of AME and URE samples could also be ascribed to the abundant copper phyllosilicate structure. [29] It can be seen from Figure 1b,c that SOX, SCO and ACA showed uniform pores, the pore size of which was ca 10 nm. However, the SOH sample showed an irregular pore structure in the range ca 10-20 nm because of the strong basicity of NaOH.…”

Section: Physiochemical Properties Of Cu/sio 2 Catalystsmentioning

confidence: 90%

“…[18] The pore shape of these roasted Cu/SiO 2 samples was that of slit pores. [29] It is evident from Table 1 that the catalyst supported by silica had a large specific surface area. Furthermore, compared with the co-precipitation method, the homogeneous precipitation method could introduce more abundant pore structure and thus larger specific surface areas.…”

Section: Physiochemical Properties Of Cu/sio 2 Catalystsmentioning

confidence: 97%

“…The other four samples showed evident characteristic peaks of CuO phase at 35.6°and 38.7°(JCPDS 05-0661). [15,29] The crystallite sizes calculated by the Scherrer equation are presented in Table 2. The crystallite sizes followed the trend SOX > ACA > SCO > SOH > AME > URE, which directly indicated that the homogeneous precipitation method benefited the formation of small crystallite sizes.…”

Section: Physiochemical Properties Of Cu/sio 2 Catalystsmentioning

confidence: 99%

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Study of nano‐Cu/SiO₂ catalysts for highly selective hydrogenation of acetophenone

Wang

Zhang

Wang

et al. 2019

Applied Organom Chemis

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Hydrogenation of acetophenone over nano-Cu/SiO 2 catalysts was investigated.The catalysts, prepared by a liquid precipitation method using various precipitating agents, were characterized using low-temperature nitrogen adsorption, X-ray diffraction, temperature-programmed desorption of ammonia, hydrogen temperature-programmed reduction, transmission electron microscopy and X-ray photoelectron spectroscopy. It was found that the catalysts prepared by a homogeneous precipitation method had better activity and stability than those prepared by a co-precipitation method. The catalyst prepared using urea as precipitating agent had well-dispersed copper species, high surface area and abundant pore structure. The catalytic performance and mechanism of the Cu/SiO 2 catalysts were further studied. It was found that the activity and stability of the catalysts could be improved by adjusting the proportion of Cu + /(Cu + + Cu 0 ). The sample prepared using urea as precipitating agent presented higher activity and selectivity. Also, the catalyst prepared using urea maintained a high catalytic performance while being continuously used for 150 h under the optimal reaction conditions.

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“…[39,40,46,47] When using urea as a reactant, the method was called urea hydrolysis deposition-precipitation method. [44,48] Owing to the volatility and toxicity of ammonia, an environmentally benign approach to prepare Cu/SiO 2 catalysts was developed. (NH 4 ) 2 CO 3 was also used to replace ammonia in the synthesis process.…”

Section: Synthesis Methodsmentioning

confidence: 99%

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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Effect of copper loading on texture, structure and catalytic performance of Cu/SiO2 catalyst for hydrogenation of dimethyl oxalate to ethylene glycol

Cited by 60 publications

References 31 publications

Comparison between a Water-Based and a Solvent-Based Impregnation Method towards Dispersed CuO/SBA-15 Catalysts: Texture, Structure and Catalytic Performance in Automotive Exhaust Gas Abatement

Comparison between a Water-Based and a Solvent-Based Impregnation Method towards Dispersed CuO/SBA-15 Catalysts: Texture, Structure and Catalytic Performance in Automotive Exhaust Gas Abatement

Study of nano‐Cu/SiO₂ catalysts for highly selective hydrogenation of acetophenone

New Catalysts for Coal to Ethylene Glycol

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Effect of copper loading on texture, structure and catalytic performance of Cu/SiO2 catalyst for hydrogenation of dimethyl oxalate to ethylene glycol

Cited by 60 publications

References 31 publications

Comparison between a Water-Based and a Solvent-Based Impregnation Method towards Dispersed CuO/SBA-15 Catalysts: Texture, Structure and Catalytic Performance in Automotive Exhaust Gas Abatement

Comparison between a Water-Based and a Solvent-Based Impregnation Method towards Dispersed CuO/SBA-15 Catalysts: Texture, Structure and Catalytic Performance in Automotive Exhaust Gas Abatement

Study of nano‐Cu/SiO2 catalysts for highly selective hydrogenation of acetophenone

New Catalysts for Coal to Ethylene Glycol

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Product

Resources

About

Study of nano‐Cu/SiO₂ catalysts for highly selective hydrogenation of acetophenone