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Journal of Materials Science
Erschienen in: Journal of Materials Science 3/2018

04.10.2017 | Chemical routes to materials

Influence of oxygen-containing groups of activated carbon aerogels on copper/activated carbon aerogels catalyst and synthesis of dimethyl carbonate

verfasst von: Jing Wang, Ruina Shi, Panpan Hao, Wei Sun, Shusen Liu, Zhong Li, Jun Ren

Erschienen in: Journal of Materials Science | Ausgabe 3/2018

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Abstract

Active catalysts that were prepared by dispersing copper (Cu) nanoparticles on potassium hydroxide (KOH)-activated carbon aerogels (ACAs) were investigated in the synthesis of dimethyl carbonate (DMC) by vapor-phase oxidative carbonylation of methanol. The effect of mesopores and surface oxygen-containing groups (OCGs) including C = O, COOH and OH of the ACAs on the dispersion of active species and catalytic properties was determined. An increase in molar ratio of resorcinol to anhydrous sodium carbonate (R/C) lead to the creation of mesopores within the original carbon aerogels (CAs), which benefits to molecules mass transport. The amount of surface OCGs increased positively with KOH/CAs mass ratio, which affected the valence distribution of Cu species, improved the Cu dispersion and enhanced the catalytic activity. For an optimum R/C of 500 and a KOH/CAs mass ratio of 4, the Cu/ACAs catalyst maintains a prominent DMC space time yield of 338.7 mg/(g h) and a methanol conversion of 2.5%. Density functional theory calculations indicate that of the different surface OCGs of the carbon support, enrichment in C = O group enhances the interaction between the metal and the ACAs support significantly and contributes to the formation of the smallest Cu nanoparticles and the highest catalytic activity.
Vorheriger Artikel Synthesis of green phosphors from highly active amorphous silica derived from rice husks
Nächster Artikel Preparation of hierarchical TS-1 zeolite membrane via a dissolution–recrystallization process

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Metadaten
Titel
Influence of oxygen-containing groups of activated carbon aerogels on copper/activated carbon aerogels catalyst and synthesis of dimethyl carbonate
verfasst von
Jing Wang
Ruina Shi
Panpan Hao
Wei Sun
Shusen Liu
Zhong Li
Jun Ren
Publikationsdatum
04.10.2017
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 3/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-017-1639-8

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