SBA-15-supported highly dispersed copper catalysts: Vacuum–thermal preparation and catalytic studies in propylene partial oxidation to acrolein

Liu, Chun-Hsia; Lai, Nien-Chu; Lee, Jyh‐Fu; Chen, Ching-Shiun; Yang, C. S.

doi:10.1016/j.jcat.2014.05.013

Cited by 35 publications

(13 citation statements)

References 46 publications

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“…Accordingly, small, well-dispersed copper oxide particles exhibited an increased surface to bulk ratio and, thus, a higher activity in comparison to larger particles or bulk material. [7,49] After 6 h time-on-stream, propene reaction rates of all CuO/SBA-15 samples decreased and were largely independent of copper loading. All five CuO/SBA-15 samples exhibited a similar decrease in UV-Vis absorption edge energies and, hence, increase in particle size during time on stream ( Figure 5).…”

Section: Catalytic Performance and Structure Function Correlationsmentioning

confidence: 99%

“…[30] Independent of layer thickness, copper nitrate led to crystalline phases for a copper loading of more than 20 wt.%. [31] Using copper citrate as precursor and a copper [a] Surface area and mean pore diameter were calculated via BET and BJH method, respectively. Lattice parameter was calculated from peak positions of small angle XRD patterns and wall thickness was calculated as the difference between lattice parameter and mean pore diameter.…”

Section: Characterization Of Supported Copper Oxidementioning

confidence: 99%

“…Either way, a decrease in propene reaction rate was accompanied by an increase in selectivity towards acrolein which is typical catalyst behavior. [31,52] Selectivity towards PO is shown in Figure 11 for various copper loadings. At the beginning of the reaction, the amount of PO formed by Cu1.1 and Cu3.7 was negligible.…”

Section: Catalytic Performance and Structure Function Correlationsmentioning

confidence: 99%

“…[4] Besides molybdenum-based oxides, copper oxides are well-known selective oxidation catalyst capable of oxidizing propene to acrolein and propylene oxide. [5][6][7] In contrast to production of acrolein, a suitable process for industrial production of PO is lacking. Current methods established for the production of PO are chlorohydrin and hydroperoxide processes.…”

Section: Introductionmentioning

confidence: 99%

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Correlation between Copper Oxide Particle Size and Selectivity towards Propylene Oxide in Selective Oxidation of Propene

et al. 2018

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Copper oxide catalysts supported on nanostructured silica SBA‐15 were synthesized with varying copper loadings in a range from 1.1 to 19.4 wt.%. Catalysts were structurally characterized by N2 physisorption, X‐ray diffraction and ex situ as well as in situ diffuse reflectance UV‐Vis spectroscopy. Copper oxide species contained Cu2+ in an octahedral configuration with a tetragonal distortion. Increasing the copper loading resulted in a decreasing optical band gap, which is associated with a growing particle size. Additionally, CuO/SBA‐15 samples were examined by temperature‐programmed reduction confirming a narrow particle size distribution. Structural evolution and catalytic activity were investigated during selective oxidation of propene focusing on product distribution of nucleophilic and electrophilic oxidation. Catalytic testing was carried out using an on‐line GC and MS coupled to a laboratory fixed‐bed reactor. All catalysts selectively oxidized propene to acrolein and propylene oxide (PO). With time on stream activity decreased while selectivity towards acrolein and PO increased. While selectivity towards PO increased with copper loading and, hence, copper oxide particle size, selectivity towards acrolein was largely independent of copper loading.

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Section: Catalytic Performance and Structure Function Correlationsmentioning

confidence: 99%

Section: Characterization Of Supported Copper Oxidementioning

confidence: 99%

Section: Catalytic Performance and Structure Function Correlationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Correlation between Copper Oxide Particle Size and Selectivity towards Propylene Oxide in Selective Oxidation of Propene

et al. 2018

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“…The main industrial method for AA production is the two-stage oxidation of propylene through the intermediate formation of acrolein and its oxidation to AA [4]. Methyl acrylate is obtained by the esterification of AA with methanol on acid-type catalysts [5].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Acrylic acid synthesis by oxidative condensation of methanol and acetic acid on B–P–V–W–Ox/SiO2 catalyst

Nebesnyi

Pikh

Kubitska

et al. 2019

EEJET

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Stepwise Methane‐to‐Methanol Conversion on CuO/SBA‐15

Parishan

Sagaltchik

et al. 2018

Chemistry A European J

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The direct partial oxidation of methane to methanol is a challenging scientific and economical objective to expand the application of this abundant fuel gas as a major resource for one-step production of value-added chemicals. Despite substantial efforts to commercialize this synthetic route, to date no heterogeneous catalyst can selectively oxidize methane to methanol by O with an economically acceptable conversion. Cu-exchanged zeolites have been recently highlighted as one of the most promising bioinspired catalysts toward the direct production of methanol from methane under mild conditions. In this work, Cu-based catalysts were prepared using mesoporous silica SBA-15 as an alternative support and their activity for this conversion was investigated. The results demonstrate that highly dispersed CuO species on SBA-15 are able to react with methane and subsequently produce methanol with high selectivity (>84 %) through water-assisted extraction. Furthermore, it was confirmed that the main intermediate formed after interaction of the catalyst with methane is a methoxyl species, which can be further converted to methanol or dimethyl ether on extraction with water or methanol, respectively.

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SBA-15-supported highly dispersed copper catalysts: Vacuum–thermal preparation and catalytic studies in propylene partial oxidation to acrolein

Cited by 35 publications

References 46 publications

Correlation between Copper Oxide Particle Size and Selectivity towards Propylene Oxide in Selective Oxidation of Propene

Correlation between Copper Oxide Particle Size and Selectivity towards Propylene Oxide in Selective Oxidation of Propene

Acrylic acid synthesis by oxidative condensation of methanol and acetic acid on B–P–V–W–Ox/SiO2 catalyst

Stepwise Methane‐to‐Methanol Conversion on CuO/SBA‐15

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