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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 大连理工大学成都研究院院长
性别:男
毕业院校:中科院大连化学物理研究所
学位:博士
所在单位:化工学院
学科:化学工艺. 物理化学. 功能材料化学与化工
办公地点:大连理工大学西部校区化工综合楼A401室
联系方式:辽宁省大连市高新区凌工路2号,邮编116024
电子邮箱:changhai@dlut.edu.cn
Enhanced Hydroconversion of Lignin-Derived Oxygen-Containing Compounds Over Bulk Nickel Catalysts Though Nb2O5 Modification
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论文类型:期刊论文
发表时间:2017-08-01
发表刊物:CATALYSIS LETTERS
收录刊物:SCIE、EI、Scopus
卷号:147
期号:8
页面范围:2215-2224
ISSN号:1011-372X
关键字:Nb2O5; Bulk nickel catalysts, synergistic effect; Hydroconversion; Anisole
摘要:A series of bimetallic Nb-Ni oxide catalysts with different Nb/Ni molar ratio have been prepared by chemical precipitation method. XRD, Raman and XPS results indicate that amorphous Nb2O5 species exist in the samples with a Nb/Ni ratio about 0.087. The as-synthesized bimetallic Nb-Ni oxides effectively promote the dispersion of NiO active components, as a result effectively inhibit the agglomeration of NiO particles. Ni0.92Nb0.08O sample with the largest surface area of 173 m(2)/g mainly consists of fold-like nanosheets and the amorphous Nb2O5 species are well-dispersed all over the bulk NiO. After the reduction in hydrogen, the Nb-promoted bulk nickel catalysts display better catalytic performance for hydrodeoxygenation of lignin-derived anisole to biofuels than bulk Ni catalyst. The selectivity to deoxygenated products with using Ni0.92Nb0.08 catalyst increases 2.5 fold to that with bulk Ni catalyst at 160 A degrees C and 3 MPa H-2, as a result of the synergistic effect between amorphous Nb2O5 species and metal Ni active sites. In addition, with further increase in the reaction temperature to 200 A degrees C, deoxygenation almost goes quantitatively.
High-specific-surface-area Nb-Ni oxides are prepared by using chemical precipitation, and display excellent HDO performance for lignin-derived compounds. Selectivity to deoxygenated products increases 2.5 folds over Ni0.92Nb0.08 than over bulk Ni catalyst.
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