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자료유형
학술저널
저자정보
저널정보
한국수소및신에너지학회 한국수소및신에너지학회논문집 한국수소 및 신에너지학회 논문집 제29권 제2호
발행연도
2018.4
수록면
170 - 180 (11page)

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After MoS₂ catalyst was prepared at 1, 30, and 70 atm, the hydrothermal pressure effect over preparation of MoS₂ was investigated in terms of catalyst characterization and direct methanation. Multifaceted characterization techniques such as XRD, BET, SEM, TPR, EDS, and XPS were used to analyze and investigate the effect of high pressure over the preparation of surface and bulk MoS₂ catalyst. Result from XRD, SEM, and BET demonstrated that MoS₂ was more dispersed as preparation pressure was increased, which resulted finer MoS₂ crystal size and higher surface area. EDS result confirmed that bulk composition was MoS₂ and XPS result showed that S/Mo mole ratio of surface was about 1.3. TPR showed that MoS₂ prepared at 30 atm possessed higher active surface sites than MoS₂ prepared at 1 atm and these sites could contribute to higher CO yield during methanation. Direct methanation was used to evaluate the CO conversion of the both catalysts prepared at 1 atm and 30 atm and reaction condition was at feed mole ratio of H<sub>2</sub>/CO=1, GHSV=4800, 30 atm, temperature(℃) of 300, 350, 400, and 450. MoS₂ prepared at 30 atm showed more stable and higher CO conversion than MoS₂ prepared at 1 atm. Faster deactivation was occurred over MoS₂ prepared at 1 atm, which indicated that preparation pressure of MoS₂ catalyst was the dominant factor to improve the yield of direct methanation.

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