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Plant lignocellulose‐based feedstocks hydrogenolysis into polyols over a new efficient nickel–tungsten catalyst
Author(s) -
Xiao Zhuqian,
Xu Yidan,
Fan Yu,
Zhang Qiang,
Mao Jianwei,
Ji Jianbing
Publication year - 2017
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.2153
Subject(s) - hydrogenolysis , catalysis , ethylene glycol , microcrystalline cellulose , materials science , cellulose , bimetallic strip , nickel , nuclear chemistry , microcrystalline , temperature programmed reduction , nanomaterial based catalyst , chemistry , chemical engineering , organic chemistry , metallurgy , engineering , crystallography
Here, we developed a new strategy for preparation of series of in‐situ reduction bimetallic catalysts Ni‐W/SiO 2 by introducing of reducing agent in the preparation process. And these catalysts were applied into the catalytic hydrogenolysis of microcrystalline cellulose and pretreated lignocellulose. The results show that the in situ reduction 15%Ni–20%W/SiO 2 shows the prominent activity for microcrystalline cellulose conversion into ethylene glycol (EG), 1,2‐propylene glycol, and glycerol with the highest yield of EG at 61.30% under the experimental condition. And the relative high of EG yield (30.23%) was obtained when a combinative pretreatment technology of steam explosion (0.45 MPa) coupled with hot alkali (70 °C) was introduced to enhance the hydrogenolysis of plant lignocellulose‐based feedstocks over the in situ reduction catalyst 15%Ni–20%W/SiO 2 . The SEM and thermogravimetry analysis revealed that segmental lignin and hemicellulose were removed partly by hot alkali pretreatment. Meanwhile, the existence of Ni–W alloys and metal Ni particles were evidenced by X‐ray diffraction spectra. In addition, by the detailed analysis via transmission electron microscopy and X‐ray photoelectron spectroscopy, the catalytic particle size was distributed in the range of 9.3 ± 1.3 nm.