원문정보
초록
영어
10 wt% (Ni-Co) catalysts with different Ni and Co content : 10%Ni, 9%Ni1%Co, 7%Ni3%Co, 5%Ni5%Co, 3%Ni7%Co, and 10%Co; were prepared using sol-gel method followed by incipient wetness impregnation method. To investigate the catalytic activity including the stability, dry methane reforming were demonstrated over the pelletized catalysts at 620˚C under atmospheric pressure in a CH4:CO2:N2 feedstock for 360 min. The results showed that bimetallic catalysts with the Co content equal to or greater than 3% were more stable than monometallic catalysts (10%Ni and 10%Co). The temperature programmed hydrogenation interpreted that the additional of Co into Ni catalyst improved the carbon resistance from methane cracking. Promoted this type of bimetallic catalyst using 1wt% K (trimetallic catalyst) prevented the carbon formation on the catalyst. The temperature programmed desorption of CO2 indicated that this trimetallic catalyst has a greater number of strong basic sites. Moreover, the appearance of K lowered the number of weak basic sites and decreased the conversion of methane by 12 %.
목차
1. INTRODUCTION
2. EXPERIMENTAL
2.1 Catalyst preparations
2.2 Catalytic activity test
2.3 Characterization
3. RESULTS AND DISCUSSION
3.1 Performances and properties of x%Niy%Co/MgO-Al2O3
3.2 Performances and properties of 7%Ni3%Co1%K /MgO-Al2O3
4. CONCLUSION
REFERENCES