Wood waste valorization: sustainable conversion of lignin-derived model compounds by ni-based nano-catalysts
Catalytic Conversion of lignocellulosic biomass provides a way to treat both fossil fuels shortage as well as ever-increasing wood waste problem. To depolymerize lignin structure, the cleavages of C-O bonds in 5-O-4’ and β-O-4 linkages are challenging due to the high bond dissociation energies. We devised two types of Ni-based catalytic system for the C-O cleavages on lignin-derived model compounds. Due to interaction between acid sites and metal sites, Ni on mesoporous Zr-doped NbPO4 demonstrated excellent conversion (84%) of diaryl ether to cleavage products and good hydrodeoxygenation selectivity (92%) at 220oC and 0.5 MPa. Nb promoted bulk Ni nano-catalysts have been found to convert anisole to hydrodeoxygenated products efficiently. Selectivity to deoxygenated products increases 2.5 folds over Ni0.92Nb0.08 than over bulk Ni catalyst, which is mainly attributed to the catalytic synergistic effect between amorphous Nb2O5 species and metal Ni active sites.
ACS Symposium on Energy Materials
Tsang, C.,Lu, X.,King, P.,& Li, C. (2017). Wood waste valorization: sustainable conversion of lignin-derived model compounds by ni-based nano-catalysts. ACS Symposium on Energy Materials. Retrieved from https://repository.vtc.edu.hk/thei-fac-sci-tech-sp/390