Support effects in the gas phase hydrogenation of butyronitrile over palladium

Hao, Y. and Wang, Xiaodong and Perret, N. and Cárdenas-Lizana, Fernando and Keane, Mark A. (2015) Support effects in the gas phase hydrogenation of butyronitrile over palladium. Catalysis, Structure and Reactivity, 1 (1). pp. 4-10.

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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.

Item Type:
Journal Article
Journal or Publication Title:
Catalysis, Structure and Reactivity
ID Code:
136912
Deposited By:
Deposited On:
23 Sep 2019 11:50
Refereed?:
Yes
Published?:
Published
Last Modified:
13 May 2020 06:44