Support effects in the gas phase hydrogenation of butyronitrile over palladium

Yufen Hao, Xiaodong Wang, Noémie Perret, Fernando Cárdenas-Lizana, Mark Keane

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The role of the support in the gas phase hydrogenation of butyronitrile over Pd/Al2O3 and Pd/C (2.5–3.0 nm mean Pd size) has been studied, taking bulk Pd as benchmark. Catalyst activation by temperature programmed reduction was monitored and the metal and acid functions characterized by H2 and NH3 chemisorption/temperature programmed desorption and electron microscopy (STEM/TEM). Butyronitrile hydrogenation was stable with time on-stream to deliver butylamine where consecutive condensation with the intermediate butylidenimine generated dibutylamine and tributylamine. Condensation can occur on bulk Pd but selectivity is influenced by the support and reaction over Pd/Al2O3 generated dibutylamine as principal product. Preferential tertiary amine formation was observed over Pd/C and attributed to greater surface acidity that favors the condensation step. Increased hydrogen spillover and acidity (associated with Pd/C) elevated butyronitrile consumption rate.
Original languageEnglish
Pages (from-to)4-10
Number of pages7
JournalCatalysis, Structure & Reactivity
Volume1
Issue number1
DOIs
Publication statusPublished - Feb 2015

Keywords

  • Pd/Al2O3
  • Pd/C
  • Bulk PD
  • butyronitrile hydrogenation
  • surface acidity
  • spillover hydrogen

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