Bifunctional carbon Ni/NiO nanofiber catalyst based on 5-sulfosalicylic acid for conversion of C5/C6 carbohydrates into ethyl levulinate

Haixin Guo, Yuya Abe, Xinhua Qi, Richard Lee Smith

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A method was developed for preparing bifunctional carbon Ni/NiO nanofiber catalysts that promote efficient one-pot conversion of C5/C6 carbohydrates into levulinate esters in alcohol solvents. The bifunctional catalysts were prepared via solvothermal carbonization of 5-sulfosalicylic acid/NiSO4 without the use of sulfuric acid or hydrogen gas and had fine particle sizes (d = 5 nm to 50 nm) and contained -NH2, -SO3H, -COOH and phenolic -OH functional groups. Under optimal conditions, the catalysts afforded 93% selectivity of ethyl levulinate in ethanol with the major intermediate being 2-(ethoxymethyl)furan, 4,5,5-triethoxypentan-2-one and major byproduct being 2,5,5-triethoxpentan-2-one. Cooperative activity of Lewis acidity, Brønsted acidity and functional group sites of the catalyst is demonstrated for multi-step reaction sequences of C5/C6 carbohydrates with one-pot conversions and alcohols (methanol, ethanol, 1-propanol, 1-butanol) that act as both solvent and hydrogen donor source in which the bifunctional catalyst was shown to be recyclable five times with no apparent change in conversion and ca. 5% change in selectivity. This journal is

Original languageEnglish
Pages (from-to)1759-1767
Number of pages9
JournalReaction Chemistry and Engineering
Volume5
Issue number9
DOIs
Publication statusPublished - 2020 Sep

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (miscellaneous)
  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes

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