Photo splitting of bio-polyols and sugars to methanol and syngas

We report the conversion of biomass-derived polyols and sugars into methanol and syngas via UV light irradiation under room temperature, and the bio-syngas can be further used for the synthesis of methanol

Min Wang; Meijiang Liu; Jianmin Lu; Feng Wang

2020

Scholarcy highlights

  • Methanol is a clean liquid energy carrier of sunshine and a key platform chemical for the synthesis of olefins and aromatics
  • Direct cleavage of the C−C bond via conventional thermal-catalysis requires to be performed at a high temperature accompanied by the risk of over decomposition and carbonization
  • The copper loading of Cu/titanium oxide nanorod showed a significant effect on the production of methanol from glycerol
  • About 40% yield of methanol is reached over 2Cu/TNR, along with 31% yield of CO2, 3.6% yield of CO and 22 mmol gcat.−1 of H2
  • Methanol was not detected and only a very minor amount of CO2 detected. These results demonstrate that the acetonitrile is relatively stable under the reaction conditions and methanol is not originated from MeCN degradation
  • The similar trend that with glycerol as substrate was observed and the CO/CO2 ratio decreased with the increase of the copper loading, indicating that Cu dispersed on titanium oxide nanorod with low copper loading favors the dehydration of formic acid and Cu/TNR with high copper loading favors the dehydrogenation of formic acid
  • For the Cu/ titanium oxide nanorod with high copper loading amount, a CuOx–TiO2 heterojunction is formed and the oxidation of formic acid by holes on the CuOx phase generates to CO2 and H2

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