Study of Cu-Ni/SiO<sub>2sub> catalyst prepared from a novel precursor, [Cu(H<sub>2sub>O)<sub>6sub>][Ni(dipic)<sub>2sub>].2H<sub>2sub>O/SiO<sub>2sub>, for water gas shift reaction
- 作者：Ali Reza Salehi Rad ; Maryam Behzad Khoshgouei ; Soheil Rezvani ; Ali Reza Rezvani<sup> ; sup><sup>rezvani2001ir@yahoo.casup>
- 关键词：Novel precursor ; [Cu(H2O)6][Ni(dipic)2].2H2O/SiO2 ; Bimetallic catalyst ; Complex ; Water gas shift reaction
- 刊名：Fuel Processing Technology
- 出版年：2012
- 期刊代码：36_03783820
- 类别：ce
- 出版时间：April, 2012
- 卷：96
- 期：Complete
- 页码：9-15
- 文件大小：930 K
摘要
Silica-supported copper-nickel bimetallic catalyst was prepared from [Cu(H<sub>2sub>O)<sub>6sub>][Ni(dipic)<sub>2sub>].2H<sub>2sub>O/SiO<sub>2sub> precursor. The cationic-anionic complex, [Cu(H<sub>2sub>O)<sub>6sub>][Ni(dipic)<sub>2sub>].2H<sub>2sub>O, was prepared from the reaction of (NH<sub>4sub>)<sub>2sub>[Ni(dipic)<sub>2sub>] with Cu(NO<sub>3sub>)<sub>2sub>.3H<sub>2sub>O in water and characterized by elemental analysis, conductometric and various spectroscopy techniques such as FT-IR, UV-vis and atomic absorption. The physicochemical characteristics of both precursor and calcined catalyst were carried out using X-ray diffraction, thermal analysis methods (TGA and DSC), FT-infrared, scanning electron microscopy and BET specific surface area. The catalyst was evaluated for water gas shift reaction. When the Cu-Ni/SiO<sub>2sub> catalyst was used for water gas shift reaction at 300 掳C and atmospheric pressure, the CO conversion and CO<sub>2sub> selectivity were about 97.83%and 98.67%, respectively, showing higher activity and selectivity than the reference catalyst prepared by impregnation conventional method.