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Optimization of reformer in HEGR
황주순,설용건,송현우,송순호 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Hydrogen exhuast gas recirculation system adds H2 to the existing exhaust gas recirculation (EGR) system. Researches indicate that HEGR improves the efficiency of the engine while decreases particle matter and CO2 emission. But the development and commercialization of this process is difficult because H2 withholds problems like insufficient supply infrastructure, stability, etc. We propose the installation of an EGR system combined with an on-board fuel reformer which produces hydrogen gas from hydrocarbon fuel. Compared with general fuel reforming,the operating condition are burdening due to several reasons. The lower temperatures under than 50°C, rapid gas flow, carbon coking,catalyst poisoning all account as issues to be dealt. We observed fuel reforming operated on these conditions using Pt-GDC as a catalyst.
메탄을 이용한 매체 순환 개질 시스템을 위한 Ni-YSZ 촉매에서의 Y에 따른 촉매 반응 특성 연구
김희선,전유권,황주순,송순호,설용건 한국수소및신에너지학회 2015 한국수소 및 신에너지학회논문집 Vol.26 No.6
Nickel based oxygen transfer materials supported on two different YSZs were tested to evaluate their performance in methane chemical-looping reforming. The oxygen transfer materials of YSZs were selected with different amount of the doped yittrium in the ZrO2 structure. The yittrium of 8 mol% stabilized the zirconia oxide to a cubic structure compare to the 3 mol% doping, which is known to be a good for oxygen transfer. Various nickel amounts (16wt.%, 32wt.%, 48wt.%) were loaded on the selected supports. The nickel amount of 32% shows the optimized catalyst structure with good physical properties and reducibility from the XRD, BET and H2-TPR analysis, especially when the support of 8YSZ was used. From the methane chemical-looping reforming, hydrogen was produced by methane decomposition catalyzed by Ni on both YSZs. Comparing two YSZ supports of 3YSZ and 8YSZ during the cycling tests, the catalyst with 8YSZ (Ni 32%) exhibits not only the higher methane conversion and hydrogen production but also a faster reaction rate reaching to the stable point.
Design of Au core-Palladium alloy shell nanoparticle for oxygen reduction reaction in fuel cells
이예연,설용건,김형수,전유권,박명근,( Ulziidelger Byambasuren ),황주순 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Platinum based nanomaterials are usually used as the electrocatalysts for both the cathode(oxygen reduction) and anode(hydrogen oxidation) reactions. However, the high cost of Pt in cathode catalyst and the slow kinetics of oxygen reduction reaction (ORR) on Pt-based catalysts hinder the commercialization of fuel cells. Instead of using platinum, recent studies have focused on the discovery of non platinum electrocatalysts which have excellent electrocatalytic activity and chemical stability. In this study, we synthesized gold core/palladium-Cobalt alloy shell catalysts. The developed catalysts showed excellent catalytic activity than Au core/Pd shell catalysts. The structural information and electrocatalytic activities of the Au core/Pd-Ir alloy shell nanoparticles were analyzed by XRD, XPS, HR-TEM, ORR test and cyclic voltammetry(CV).