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Preparation of nitrogen-containing carbon nanotubes and study of their performance as basic catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40452 45854 2013 7 PDF Available
Title
Preparation of nitrogen-containing carbon nanotubes and study of their performance as basic catalysts
Abstract

•Nitrogen-doped CNTs prepared using acetonitrile as precursor.•Different metals (Fe, Co, Ni) as catalysts for preparing different N-CNTs.•Tested as catalysts for acetone aldolization and acetic acid ketonic condensation.•Activity for both reactions depends on pyridinic sites concentration.•Catalysts are more stable for aldol condensation.

Nitrogen-containing carbon nanotubes were prepared, characterized and used as catalysts for two reactions of interest in the biomass upgrading processes: acetone aldol and acetic acid decarboxylative condensations. N-CNT were synthesized in a fluidized bed reactor by catalytic chemical vapor decomposition of acetonitrile on iron-, cobalt- and nickel-supported catalysts. Ni-N-CNT catalyst exhibits the highest activity, attributed to the surface concentration of basic sites, particularly the pyridinic species detected by X-ray photoelectron spectra (XPS). Likewise, the selectivity toward the final products of the reaction pathway is related both to the strength of basic sites (Ni-N-CNT) and to the morphology and chemical environment of the active sites (Fe-N-CNT). Synthesized catalysts show high stability for acetone condensation, whereas for ketonic condensation the catalyst stability decreases, mainly due to acic–base interactions with the active sites.

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Keywords
Doped carbon nanotubes; Aldol condensation; Decarboxylative condensation; Biomass upgrading; Pyridinic species; Ketonization
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Preparation of nitrogen-containing carbon nanotubes and study of their performance as basic catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 458, 10 May 2013, Pages 155–161
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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