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안선용,전경원,노현석 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
The high temperature water-gas shift (HT-WGS) reaction using simulated waste-derived synthesis gas has been carried out at gas hourly space velocity (GHSV) of 50,056 h<sup>-1</sup> over Pt promoted Ce/Cu/γ-Al<sub>2</sub>O<sub>3</sub> catalysts. To investigate the effect of preparation method on Pt promoted Ce/Cu/γ-Al<sub>2</sub>O<sub>3</sub> catalyst for the high temperature water-gas shift reaction using simulated waste-derived synthesis gas, Ce-Pt/Cu/γ-Al<sub>2</sub>O<sub>3</sub>, Ce/Cu-Pt/γ-Al<sub>2</sub>O<sub>3</sub> catalysts were prepared by a sequential impregnation method. Among the prepared catalysts, Ce-Pt/Cu/γ-Al<sub>2</sub>O<sub>3</sub> catalyst showed the highest catalytic performance.
WC와 Co원료 입자크기 변화에 따른 WC-Co계 초경합금의 특성 변화
정태주,안선용,백용균,Chung, Tai-Joo,Ahn, Sun-Yong,Paek, Yeong-Kyeun 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.3
서로 다른 입자크기를 갖는 WC와 Co 분말 원료를 사용하여 $WC-10\;wt\%$Co 초경합금을 제조하였다. 이로부터 WC와 Co 원로. 입자크기가 제조된 초경합금의 성질에 미치는 영향에 대해 고찰하였다. WC 원료 입자크기가 클수록 제조된 초경합금이 파괴인성이 높고 경도는 낮게 나타나는데, 이러한 경향은 Co 원료 입자크기에 크게 영향 받지 않음을 알 수 있었다. Co 원료 크기의 영향 외에도 Co 원료 크기가 초경합금의 특성에 영향을 주는 것으로 밝혀졌는데, 동일한 WC 원료를 사용하여도 미세한 Co 원료를 사용할 경우, 보다 조대한 WC를 함유하여 인성이 우수한 초경합금을 제조할 수 있었다. 이로부터 Co 원료 입자크기가 초경합금의 미세구조 및 그 특성에 중요한 역할을 함을 알 수 있었다 The effect of variation in particle size of WC and Co powder on the properties of WC-Co alloys was investigated. WC and Co powders having different particle sizes were used in the fabrication of $WC-10\;wt\%$Co composites. High hardness and low fracture toughness alloy was obtained with the decrease in WC particle size regardless of Co particle size. It was newly found in this investigation that the initial particle size of Co as well as WC had a great role in the microstructure and properties of WC-Co hard materials. The average grain size and fracture toughness of WC-Co alloys using same WC powder size increased and their hardness decreased with the use of relatively finer Co binder.
전경원,안선용,노현석 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
The CO<sub>2</sub> reforming of coke oven gas for the production of synthesis gas has been studied over Ni-based catalysts prepared by the impregnation method. The different materials (Al<sub>2</sub>O<sub>3</sub>, MgO, CeO<sub>2</sub>, ZrO<sub>2</sub>, MgO-Al<sub>2</sub>O<sub>3</sub>, and CeO<sub>2</sub>-ZrO<sub>2</sub>) were used as supports for Ni-based catalysts. Among the Ni-based catalysts with different supports, the Ni/MgO-Al<sub>2</sub>O<sub>3</sub> catalyst exhibited the highest catalytic performance. Additionally, the effect of Ni loading amount for Ni/MgO-Al<sub>2</sub>O<sub>3</sub> catalyst was also investigated. The effects of supports and Ni loading amount on catalytic performance have been interpreted through various characterization techniques and related to the activity results in the CO<sub>2</sub> reforming of coke oven gas.