The catalytic activity of Ni-0.2%YSZ (Yttria-Stabilized Zirconia) with different promoters was evaluated for CO2 methanation. The catalysts were weighed for mixing and they were dried at 110 for molding into disks. The concentration of CO2 and CH4 for conducting of CO2 methanation were analyzed by gas chromatography and the physical characteristics of the disk-type catalyst formed were analyzed by X-ray diffraction, scanning electron microscope and energy dispersive x-ray spectrometer. The addition of CeO2 as a promoter for Ni-0.2%YSZ (denoted as Ni-5%Ce-0.2%YSZ) resulted in the highest CO2 methanation. It also showed catalytic activity at a low temperature(200°C). Following this, ZrO2, SiO2, Al2O3 and TiO2 were added to Ni-5%Ce-0.2%YSZ to compare the CO2 methanation, and the highest efficiency was found for. Ni-1%Ti-5%Ce -0.2%YSZ Then, the concentration of Ti was increased to 10% and the catalytic activity was estimated using seven different types of commercial TiO2. In conclusion, ST-01 TiO2 showed the highest efficiency for CO2 methanation.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 촉매 제조
  2.2. 촉매 특성 분석
  2.3. 촉매 활성 실험
 3. 결과 및 고찰
  3.1. 촉매 특성 분석
  3.2. CO2 methanation 분석
 4. 결 론
 REFERENCES

• 이재정(경기대학교 일반대학원 환경에너지공학과) | Jae-Joung Lee (Department of Environmental Energy Engineering, Graduate School, Kyonggi University)
• 문대헌(경기대학교 일반대학원 환경에너지공학과) | Dea-Hyun Moon (Department of Environmental Energy Engineering, Graduate School, Kyonggi University)
• 장순웅(경기대학교 창의공과대학 환경에너지공학과) | Soon-Wong Chang (Department of Environmental Energy Engineering, College of Engineering, Kyonggi University) Corresponding author