Combining Low-Pressure CO2 Capture and Hydrogenation to Form Methanol

Julia R. Khusnutdinova, Jai Anand Garg, David Milstein

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70 Citations (Scopus)

Abstract

This paper describes a novel approach to CO2 hydrogenation, in which CO2 capture with aminoethanols at low pressure is coupled with hydrogenation of the captured product, oxazolidinone, directly to MeOH. In particular, (2-methylamino)ethanol or valinol captures CO2 at 1-3 bar in the presence of catalytic Cs2CO3 to give the corresponding oxazolidinones in up to 65-70 and 90-95% yields, respectively. Efficient hydrogenation of oxazolidinones was achieved using PNN pincer Ru catalysts to give the corresponding aminoethanol (up to 95-100% yield) and MeOH (up to 78-92% yield). We also have shown that both CO2 capture and oxazolidinone hydrogenation can be performed in the same reaction mixture using a simple protocol that avoids intermediate isolation or purification steps. For example, CO2 can be captured by valinol at 1 bar with Cs2CO3 catalyst followed by 4-isopropyl-2-oxazolidinone hydrogenation in the presence of a bipy-based pincer Ru catalyst to produce MeOH in 50% yield after two steps.

Original languageEnglish
Pages (from-to)2416-2422
Number of pages7
JournalACS Catalysis
Volume5
Issue number4
DOIs
Publication statusPublished - Apr 3 2015

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Keywords

  • carbon dioxide
  • ethanolamine
  • hydrogenation
  • methanol
  • oxazolidinone
  • pincer
  • ruthenium

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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