Selective formation of aniline over nanogold incorporated cobalt loaded SBA 15 catalysts

Suraja Viswanathan, Binitha Narayanan, Zahira Yaakob, Pradeepan Periyat, Silija Padikkaparambil

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Nanogold was dispersed over cobalt-loaded SBA 15 to create an effective redox catalyst. The support was identified as spinel Co3O4 attached to mesoporous SBA 15 based on XRD, FTIR and TEM analyses. The gold crystallites were found to be in the nanosize range (8-15 nm) by the application of the Scherrer equation to the XRD data. XPS analysis provided insight into the state of the gold nanoparticles. The selective hydrogenation of nitrobenzene over nanogold doped cobalt-loaded SBA 15 catalysts was investigated in a fixed bed down flow reactor. The selectivity for the desired product, aniline, was very high with a maximum conversion of 98.9 % of nitrobenzene. The high catalytic performance is attributed to the efficient dispersion of gold nanoparticles over the support. Performing the reaction in the flow reactor maximizes the access of the reactants to the catalysts without the aid of any solvent, which further eliminates the filtration steps required to remove the catalyst after the reaction. Conducting the reaction at 200 °C facilitates the recovery of the product (aniline), from the catalyst, as soon as it is formed.

Original languageEnglish
Pages (from-to)251-262
Number of pages12
JournalJournal of Porous Materials
Volume21
Issue number3
DOIs
Publication statusPublished - 2014

Fingerprint

Aniline
Cobalt
Catalysts
Gold
Nitrobenzene
Nanoparticles
Crystallites
Catalyst supports
Hydrogenation
X ray photoelectron spectroscopy
aniline
SBA-15
Transmission electron microscopy
Recovery
nitrobenzene

Keywords

  • Aniline
  • Nanogold catalysts
  • Nitrobenzene
  • Selective reduction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Selective formation of aniline over nanogold incorporated cobalt loaded SBA 15 catalysts. / Viswanathan, Suraja; Narayanan, Binitha; Yaakob, Zahira; Periyat, Pradeepan; Padikkaparambil, Silija.

In: Journal of Porous Materials, Vol. 21, No. 3, 2014, p. 251-262.

Research output: Contribution to journalArticle

Viswanathan, Suraja ; Narayanan, Binitha ; Yaakob, Zahira ; Periyat, Pradeepan ; Padikkaparambil, Silija. / Selective formation of aniline over nanogold incorporated cobalt loaded SBA 15 catalysts. In: Journal of Porous Materials. 2014 ; Vol. 21, No. 3. pp. 251-262.
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