환원된 Ni / Y - Zeolite 촉매에서 니켈 금속의 분포가 일산화탄소 수소화 반응에 미치는 영향 = Metal Distribution Effects on CO Hydrogenation of Reduced Ni / Y - Zeolite Catalysts

다국어 초록 (Multilingual Abstract)

The influence of nickel metal distribution on the properties of Ni/Y-zeolite catalysts for CO hydrogenation was investigated. The studies using TPR/TPO, TEM, X-ray line broadening and FMR have shown the existence of a bidispersion of nickel metal particles; i.e., small particles were restricted inside the zeolite pores, and large particles were formed outside the zeolite crystal. CO hydrogenation reaction was performed in a differential reactor operating at atmospheric pressure, 270℃ and H₂/CO ratio of 3. Nickel metal distribution affected the activity and hydrocarbon product distribution significantly. With increasing fraction of nickel metal inside the zeolite pores the activity continued to decrease, while the production of the long chain and olefinic hydrocarbons was enhanced significantly. Especially when all the nickel metals were restricted within the pores of zeolite, a bimodal hydrocarbon product distributions for C₁ and C₄ were observed. This was ascribed to the dimerization of the primarily formed ethene to butene on the active species of Ni^+ cations.