Silica aerogel-supported copper catalyst prepared via ambient pressure drying process

被引:16
作者
Amiri, Taher Yousefi [1 ]
Moghaddas, Jafarsadegh [2 ]
Khajeh, Saeid Rahmani [2 ]
机构
[1] Univ Zanjan, Fac Engn, Dept Chem Engn, Zanjan, Iran
[2] Sahand Univ Technol, Fac Chem Engn, Transport Phenomena Res Ctr, POB 51335-1996, Tabriz, Iran
关键词
Copper-silica aerogel catalyst; Mesoprosity; Sol-gel; Impregnation; Ambient pressure drying; Methanol steam reforming; CU/SIO2; CATALYSTS; DIMETHYL OXALATE; SURFACE MODIFICATION; PHYSICAL-PROPERTIES; ION-EXCHANGE; METHANOL; HYDROGENATION; HYDROGENOLYSIS; TEMPERATURE; DEHYDROGENATION;
D O I
10.1007/s10971-015-3892-0
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Copper-silica aerogel catalyst was synthesized through the impregnation of silica alcogels by copper precursor and ambient pressure drying of the impregnated alcogels. In this safer and lower energy consumption drying mode for maintaining the gel structure, the solvent exchange and chemical surface modification were done before the drying step. The prepared Cu/SiO2 aerogels were characterized by AAS, XRD, FE-SEM, EDX, TEM, FTIR, BET and BJH techniques. Characterizations showed the complete surface modification, the presence of CuO nanocrystals, the relatively uniform dispersion of copper, the catalysts consisted of the nanoparticles, the homogeneous surface morphology, the large surface area (511-652 m(2)/g) and the high pore volume (similar to 2.7 cm(3) g) and mesoporosity which are the attractive properties of aerogels as catalyst. Also, the activity and selectivity of aerogel catalysts were studied in the hydrogen production process through methanol steam reforming reaction which showed good results. [GRAPHICS] .
引用
收藏
页码:627 / 635
页数:9
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