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- 저자 : 서정길 ( Jeong Gil Seo ) (검색결과 3 건)
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계면활성제를 이용하여 제조된 중형기공성 알루미나 담체에 담지된 니켈촉매 상에서 액화천연가스(LNG)의 수증기개질반응에 의한 수소 제조
서정길(Jeong Gil Seo),윤민혜(Min Hye Youn),송인규(In Kyu Song) 한국청정기술학회 2009 청정기술 Vol.15 No.1
양이온성(C), 음이온성(A) 및 바이온성(N) 계면활성제 각각을 주형물질로 사용하여 중형기공성 알루미나 (A-C, A-A 및 A-N)를 제조한 후, 이를 담체로 활용하여 일반적인 함침법으로 담지 니켈촉매(Ni/A-C, Ni/A-A 및 Ni/A-N)를 제조하였으며, 이를 액화천연가스의 수증기개질반응에 의한 수소 제조에 적용하였다. 소성된 촉매에서 니켈종은 계면활성제의 종류에 상관없이 중형기공성 암루미나 담체의 표면에 균일하게 분산되었다. 하지만 환원된 촉매에서 니켈과 알루미나 담체 간의 상호작용 세기는 계면활성제의 종류에 밀접하게 의존하였다. 액화천연가스 전환율 및 건가스 중 수소가스 조성은 Ni/A-C < Ni/A-A < Ni/A-N의 순으로 증가하였다. 환원된 촉매 상의 니켈 비표면적이 증가할수록 반응활성 역시 증가하는 것으로 나타났으며, 제조된 촉매 중에서 니켈 비표면적이 가장 높은 Ni/A-N 촉매가 가장 높은 반응활성을 나타내었다. Mesoporous aluminas (A-C, A-A, and A-N) were prepared by a templating method using cationic(C), anionic(A), and non-ionic(N) surfactant as a structure-directing agent, respectively. Nickel catalysts supported on mesoporous alumina (Ni/A-C, Ni/A-A, and Ni/A-N) were then prepared by an impregnation method, and were applied to hydrogen production by steam reforming of liquefied natural gas (LNG). Regardless of surfactant type, nickel species were finely dispersed on the surface of mesoporous alumina in the calcined catalysts. It was revealed that interaction between nickel species and support in the reduced catalysts was strongly dependent on the identity of surfactant. LNG conversion and H₂ composition in dry gas increased in the order of Ni/A-C < Nil A-A < Ni/A-N. It was found that catalytic performance increased with increasing nickel surface area in the reduced catalyst. Among the catalyst tested, Ni/A-N catalyst with the highest nickel surface area showed the best catalytic performance.
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공업화학(전기화학, 분석화학 포함) 촉매/반응공학 란탄 기반 페롭스카이트 촉매를 이용한 악취 유발 물질의 저온 산화 반응
방용주 ( Yong Ju Bang ),서정길 ( Jeong Gil Seo ),이기춘 ( Gi Chun Lee ),박찬정 ( Chan Jung Park ),김형태 ( Hyung Tae Kim ),송인규 ( In Kyu Song ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.2
Various La-based perovskite catalysts were prepared by a Pechini method, and they were applied to the low-temperature oxidation of odor compounds exhausted from waste food treatment process for effective deodorization. Quantitative and qualitative analyses of exhausted gas were conducted to measure the amount of major odor compounds with respect to operation time. A standard odor sample composed of major odor compounds was then prepared for use as a feed for oxidation reaction system. Various transition metal(M)-substituted La-based perovskite catalysts (LaMO3: M=Cr, Mn, Fe, Co, and Ni) were prepared and applied to the oxidation of odor compounds in order to investigate the effect of transition metal M. Among the catalysts tested, LaNiO3 catalyst showed the best catalytic performance. Pt-substituted perovskite catalysts (LaNi1-xPt03: x=0, 0.03, 0.1, and 0.3) were then prepared for enhancing the catalytic performance. It was found that LaNi0.9Pt0.1O3 catalyst served as the most efficient catalyst. Supported perovskite catalysts (XLaNi0.9Pt0.1O3/Al2O3: X=perovskite content(wt%), 0, 10, 20, 30, 40, 50, and 100) were finally applied for the purpose of maximizing the catalytic performance of perovskite catalyst in the low-temperature oxidation reaction. Catalytic performance of XLaNi0.9Pt0.lO3/Al2O3 catalysts showed a volcano-shaped curve with respect to perovskite content. Among the catalysts tested, 20LaNi0.9Pt0.1O3/A12O3 catalyst exhibited the highest conversion of odor compounds of 88.7% at 180℃.
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서정길,김종수,김용태,이경식,한성현 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
In this paper, we developed a Windows XP version off-line programming system which can simulate a track vehicle model in 3D graphics space. The track vehicle was adopted as an objective model. The interface between users and the off-line program system in the Windows XP's graphic user interface environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by Silicon Graphics, Inc. were utilized for 3D Graphics.
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