Multi-walled carbon nanotubes as catalyst promoter for dimethyl ether synthesis from CO2 hydrogenation

作者：Zha Fei^*; Tian Haifeng; Yan Jun; Chang Yue

来源：Applied Surface Science, 2013, 285: 945-951.

DOI：10.1016/j.apsusc.2013.06.150

• Multi-walled carbon nanotubes
• Catalyst promoter
• Carbon dioxide hydrogenation
• Dimethyl ether

The mixed acid of H-2 SO4 /HNO3-pretreated multi-walled carbon nanotubes was employed as supports and ultrasound-assisted co-precipitation method was designed to prepare multi-walled carbon nanotubes supported CuO-ZnO-Al-2 O-3/HZSM-5 catalyst. The catalyst was characterized by means of X-ray diffraction spectrum (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), thermal analysis (TG) and Brunauer-Emmett-Teller (BET). The catalyst activity for the preparation of dimethyl ether from hydrogenation of CO2 was investigated in a fixed-bed reactor, which showed that multi-walled carbon nanotubes could promote the catalyst activity of CuO-ZnO-Al(2)O(3/)HZSM-5. Under the reaction conditions of temperature at 262 degrees C, pressure at 3.0 MPa, H(2)lCO(2) = 3 (volume ratio) and space velocity (SV) = 1800 mL gcat(-1) h(-1), the conversion per pass of carbon dioxide was 46.2%, with the dimethyl ether yield and selectivity of 20.9% and 45.2%.

• 出版日期2013-11-15
• 单位西北师范大学