Catalytic Amination of Lactic acid using Ru-Zeolites

Meera A Shah;Ibrahim Khalil;Sofia Tallarico;T. Donckels;Michiel Dusselier;et.al.
(2022) Dalton Transactions — (2022)

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Authors
  • Meera A Shah
    Author
  • Ibrahim Khalil
    Author
  • Sofia Tallarico
    Author
  • T. Donckels
    Author
  • Eloy, PierreUCLouvain
    Author
  • Debecker, Damienorcid-logoUCLouvain
    Author
  • Michiel Dusselier
    Author
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Abstract
In this work we investigate the synthesis of alanine from lactic acid, a biobased platform chemical, using ammonia as a nitrogen source and Ru/zeolite catalysts. We report a high alanine selectivity when using Ru/BEA of 92%. Reaction side products were identified as ethanol, propionic acid or propanamide and the reaction mechanism was investigated. We further optimised reaction conditions resulting in turn over numbers five times higher than previously reported and could reduce Ru leaching by 30-40%. However, leaching and catalyst stability remains a concern. Furthermore, we critically analyse the benefits of Ru/zeolites versus their stability under the basic, high temperature reaction conditions.
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