Continuous Transfer Hydrogenation of Sugars to Alditols with Bioderived Donors over Cu–Ni–Al Catalysts. Issue 10 (29th April 2015)

• Record Type: Journal Article
• Authors: Scholz, David; Aellig, Christof; Mondelli, Cecilia; Pérez‐Ramírez, Javier
• Is Part Of: ChemCatChem. Volume 7:Issue 10(2015:May)
• Page Start: 1551
• Page End: 1558
• Publication Date: 2015-04-29
• Subjects: Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201403005
• Languages: English
• ISSNs: 1867-3880

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The transfer hydrogenation of sugars to alditols with biobased alcohol donors was studied over hydrotalcite‐derived Cu_{6−<italic>x</italic>}Ni_{<italic>x</italic>}Al₂ catalysts prepared by coprecipitation at different pH and featuring variable Cu/Ni ratios. Their evaluation, after in situ activation in pure H₂ at 773 K, in the ethanol‐assisted upgrading of glucose in a continuous‐flow fixed‐bed reactor identified the solid synthesized at pH 9–10 and with Cu/Ni=1 as the best performer. Based on textural, structural, and redox analyses, this is related to an enhanced intermetallic interaction. Upon screening alternative donors, a sorbitol yield as high as 67 % was achieved with 1, 4‐butanediol. The catalytic system displayed a stable behavior during 48 h on stream and proved suitable to hydrogenate also fructose, mannose, xylose, and arabinose to the corresponding polyols (yields up to 65 %), thus standing as a more sustainable and economical alternative to Ru‐based catalysts for sugar reductive upgrading.</p> </abstract>