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Hydrodeoxygenation of Lignin–derived Diaryl Ethers to Aromatics and Alkanes Using Nickel on Zr–doped Niobium Phosphate
Author(s) -
Jin Shaohua,
Chen Xiao,
Li Chuang,
Tsang ChiWing,
Lafaye Gwendoline,
Liang Changhai
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601107
Subject(s) - hydrodeoxygenation , chemistry , catalysis , ether , aryl , selectivity , nickel , niobium , inorganic chemistry , benzene , deoxygenation , organic chemistry , alkyl
4‐O‐5 diaryl ether owns the strongest aryl−aryl ether bond of the abundant C aryl −O bonds in lignin. Selective hydrodeoxygenation (HDO) of diaryl ethers to oxygen‐free aromatics and alkanes has been achieved over nickel nanoparticles supported on Zr‐doped niobium phosphate solid acids in an autoclave under the mild conditions. Py‐IR, NH 3 ‐TPD and TEM techniques were conducted to investigate the surface acidity and metal particle distribution of as‐synthesized catalysts. Nickel on Zr‐doped niobium phosphate exhibited an excellent activity for 84 % conversion of diaryl ether and a better selectivity of oxygen‐free aromatic about 62 % and the total HDO selectivity reached up to 92 % at 220 o C and 0.5 MPa, which is attributed to the favorable synergetic catalytic effect between acid sites and metal sites. In addition, higher reaction temperature favors the production of oxygen‐free aromatics and alkanes and low H 2 pressure is benefit for formation of benzene.