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Table 2 The main product distributions of the conversion of β-O-4, 4-O-5, α-O-4 and 1-phenyl ethanol over different catalyst

From: Highly selective cleavage C–O ether bond of lignin model compounds over Ni/CaO–H-ZSM-5 in ethanol

ReactantCatalystConv. (%)Selectivity (%)
Ethylbenzene1-Phenyl ethanolGuaiacol1-Methoxy-2-phenethoxybenzene
β-O-4 model compoundH-ZSM-5(60)2.147.210.7
CaO–H-ZSM-5(60)5.337.562.5
Ni–H-ZSM-5(60)82.814.811.773.4
Ni–CaO–H-ZSM-5(60)88.27.442.749.60.3
1-Phenyl ethanolNi–H-ZSM-5(60)56.6100
Ni–CaO–H-ZSM-5(60)44.099.2
  1. Reaction conditions: the amount of the reactant (β-O-4, 1-phenyl ethanol, 4-O-5 and α-O-4) was 2.5 mmol, mreactant:mcatalyst = 6:1, ethanol (30 mL), 140 °C, 1 MPa H2, 90 min, stirring at 700 rpm
ReactantCatalystConv. (%)BenzeneCyclohexanolCyclohexanonePhenol
4-O-5 model compoundH-ZSM-5(60)1.4100
CaO–H-ZSM-5(60)2.35.394.7
Ni–H-ZSM-5(60)26.265.51.211.622.9
Ni–CaO–H-ZSM-5(60)47.310.120.63.266.1
  1. Reaction conditions: the amount of the reactant (β-O-4, 1-phenyl ethanol, 4-O-5 and α-O-4) was 2.5 mmol, mreactant:mcatalyst = 6:1, ethanol (30 mL), 140 °C, 1 MPa H2, 90 min, stirring at 700 rpm
ReactantCatalystConv. (%)TolueneGuaiacol  
α-O-4 model compound2.730.369.7  
H-ZSM-5(60)3.65.829.5  
CaO–H-ZSM-5(60)7.548.751.3  
Ni–H-ZSM-5(60)99.546.553.5  
Ni–CaO-H-ZSM-5(60)10049.450.5  
  1. Reaction conditions: the amount of the reactant (β-O-4, 1-phenyl ethanol, 4-O-5 and α-O-4) was 2.5 mmol, mreactant:mcatalyst = 6:1, ethanol (30 mL), 140 °C, 1 MPa H2, 90 min, stirring at 700 rpm