Journal
REACTION CHEMISTRY & ENGINEERING
Volume 7, Issue 3, Pages 711-718Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1re00551k
Keywords
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Funding
- Roy J. Carver Charitable Trust (Muscatine, Iowa) [15-4521]
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A mechanistic investigation on ethanol self-condensation reaction catalyzed by a Ru(ii) catalyst was conducted in a specifically designed CSTR. The catalyst's activity was monitored using an in-line gas chromatograph, indicating good reactivity towards butanol and fast hydrogenation.
A mechanistic investigation on the ethanol self-condensation reaction (Guerbet reaction) catalyzed by a bis(pyridylimino)isoindolate Ru(ii) catalyst was performed using a specifically designed continuously-stirred tank reactor (CSTR). Leveraging vapor-liquid equilibrium, the homogeneous catalyst was maintained in the reactor at a constant concentration by dissolving it in a non-volatile solvent while volatile substrates were fed continuously. The activity of the catalyst was monitored by analyzing the vapor exiting the reactor (reagents and products) using an in-line gas chromatograph. The formation of C-6 products demonstrates the catalyst's reactivity towards butanol, and the detection of solely saturated products implies that hydrogenation is fast under the reaction conditions. These observations led us to perform a detailed study of the hydrogenation step that provided evidence for a hydrogen-transfer pathway. The corresponding reaction mechanism for the Guerbet reaction was established.
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