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Continuous Production of 1,2‐Propanediol by the Selective Hydrogenolysis of Solvent‐free Glycerol Under Mild Conditions by Long Huang; Yu‐Lei Zhu; Hong‐Yan Zheng; Yong‐Wang Li; Zhi‐Yong Zeng is a Engineering article available to read on EtoBox.
What is Continuous Production of 1,2‐Propanediol by the Selective Hydrogenolysis of Solvent‐free Glycerol Under Mild Conditions about?
## Abstract BACKGROUND: The conversion of glycerol to value‐added derivatives is now critical, owing to the large surplus of glycerol from biodiesel production. The main objective of this work is to develop a novel process for converting solvent‐free glycerol to 1,2‐propanediol. RESULTS: Several catalysts were screened for aqueous‐phase hydrogenolysis of glycerol in an autoclave. The most effective catalysts (Ni/Al~2~O~3~, Cu/ZnO/Al~2~O~3~) were further tested for vapor phase hydrogenolysis in a fixed‐bed. Ni/Al~2~O~3~ did not prove as effective for the production of 1,2‐propanediol because of the high selectivity to CH~4~ and CO. Over Cu/ZnO/Al~2~O~3~, glycerol was mainly converted to the desired 1,2‐propanediol and the reaction intermediate acetol. The production of 1,2‐propanediol was favoured at higher hydrogen pressure. At 190 °C and 0.64 MPa, near complete conversion of glycerol was achieved with 1,2‐propanediol selectivity up to 92%. In addition, a higher concentration (between 43.4% and 0.8%) of acetol was detected and an approximately stoichiometric relationship was found between acetol and 1,2‐propanediol. CONCLUSION: 1,2‐propanediol can be produced with high yields via t
Who reads Continuous Production of 1,2‐Propanediol by the Selective Hydrogenolysis of Solvent‐free Glycerol Under Mild Conditions?
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- Author
- Long Huang; Yu‐Lei Zhu; Hong‐Yan Zheng; Yong‐Wang Li; Zhi‐Yong Zeng
- Publisher
- Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0268-2575)
- Published
- 2008
- Language
- EN
- Field
- Engineering (Physical Sciences)