Paper Publications
Highly active Mo-V-based bifunctional catalysts for catalytic conversion of lignin dimer model compounds at room temperature
- Key Words:OXIDATIVE DEHYDROGENATION; AROMATIC-HYDROCARBONS; SELECTIVE OXIDATION; ETHYL LACTATE; ACETIC-ACID; DEPOLYMERIZATION; ETHANE; OXIDE; TRANSFORMATION; MOLYBDENUM
- Abstract:A novel strategy was proposed for the cleavage of C-O-C bonds in beta-O-4 lignin substrate. 2-(2'-methoxyphenoxyl)-1-phenylethanol was used as a lignin dimer model compound with a beta-O-4 ether linkage and a hydroxyl group on alpha-C position. Mo-V-based bifunctional catalysts have been developed to selectively catalyze the oxidation of C-alpha-OH and depolymerize beta-O-4 dimers under mild reaction conditions. In addition, the catalysts were characterized by XRD, SEM, TPR, NH3-TPD and N-2 adsorption. At room temperature, the conversion of dimer reached up to 89% within 4 h. Based on the analysis of HPLC-MS results, a two-step oxidation-cleavage pathway for lignin depolymerization was proposed. In the catalytic reaction process, the C-alpha-OH in the lignin dimer was first oxidized to obtain C-alpha ketone, and then the C-alpha ketone intermediate was further catalyzed to break the beta-O-4 bond. In the study, aromatic monomer compounds were obtained under the Mo-V-based bifunctional catalysts.
- Volume:116
- Issue:
- Translation or Not:no