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김관태(Kwan-Tae Kim),이대훈(Dae Hoon Lee),차민석(Min Suk Cha),길상인(Sang-In Keel),윤진한(Jin-Han Yoon),송영훈(Young-Hoon Song) 한국연소학회 2007 KOSCOSYMPOSIUM논문집 Vol.- No.-
A combined hydrogen generator of plasma and catalytic reformers has been developed, and has been applied to stabilize unstable flame of 200,000 ㎉/hr LPG combustor. The role of the plasma reformer is to generate hydrogen in a short period and to heat-up the catalytic reformer during the start-up time. After the start-up period, the catalytic reformer generates hydrogen through steam reforming with oxygen (SRO) reactions. The maximum capacity of the hydrogen generator is 100 lpm that is sufficient to be used to stabilize the flame of the present combustor. In order to reduce NOx and CO emissions simultaneously, 1) FGR (Flue Gas Recirculation) technique has been adopted and 2) the hydrogen has been added into the fuel supplied to the combustor. Test results shows that 25 % addition of hydrogen and 30 % FGR rate lead to simultaneous decrease of CO and NOx emissions. The technique proposed in the present study shows good potential to replace NH₃ SCR technique, especially in the case of small-scale combustor applications.
신장 회전아크 반응기에서 방전모드에 따른 암모니아 분해특성
김관태(Kwan Tae Kim),강희석(Hee Seok Kang),이대훈(Dae Hoon Lee),조성권(Sung Kwon Jo),송영훈(Young Hoon Song),김인명(In Myoung Kim) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.5
암모니아 처리용 플라즈마 스크러버 공정 최적화 연구를 수행하였다. 여러 반도체공정 중 확산과 이온주입공정에서는 불가피하게 부산물로서 암모니아가 배출되며, 따라서 효율적인 건식처리공정기술이 필요하다. 플라즈마 처리공정은 연소공정에서 배출되는 NOx가 발생하지 않으며, 촉매공정에서 나타나는 비활성문제가 없다. 그러나 전기에너지를 사용하기 때문에 실제 적용을 위한 최적화 연구가 필요하며, 본 연구에서는 공정 최적화를 위한 해결책으로 회전아크 반응기의 모드제어에 대한 연구를 수행하였다. 기존 회전아크 반응기에 대한 스케일 업 및 그에 대한 모드 매핑을 수행하였다. 설계 반응기를 이용하여 암모니아 분해특성을 평가하였고, 최적화 설계가 가능한 것으로 나타났다. 또한 열교환기를 포함한 전체 스케일의 스크러버 실험에서 암모니아 분해공정이 보다 안정적이고, 효율적인 것으로 나타났다. An attempt has been made to optimize elongated rotating arc plasma NH₃ scrubber. Among diverse semiconductor processes, diffusion and implantation process inevitably produce NH₃ as byproduct and efficient dry process for the decomposition of NH₃ is required. Plasma process does not produce NOx that is commonly produced in combustion process and there is no problem of deactivation, usually experienced in catalyst process. However, plasma process uses electrical energy and needs to be optimized to achieve feasibility of application. In this work, mode control of rotating arc is presented as tentative solution for the possible optimization of the process. Based on existing rotating arc, scale-up and following mode mapping was tried. Proposed reactor design was evaluated in the NH₃ decomposition process and revealed that optimization scheme is at hand. In the experiment of full scale scrubber including heat exchanger, the process gave more stable and efficient process of NH₃ decomposition.
김관태(Kwan-Tae Kim),김동국(Dong-Guk Kim),이대훈(Dae-Hoon Lee),허민(Min Hur),송영훈(Young-Hoon Song) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
This work investigates a plasma reactor suitable for the plasma gasification which requires volumetric jet and long electrode lifetime. The electrical characteristics, plasma jet images, and eroded electrode surfaces are evaluated with respect to three different shapes of grounded electrode: step, linear, and diverge types. Although the step type has more volumetric plasma jet than the linear type, it has a much shorter lifetime due to the localized erosion on the stepped region. The diverge type is best for the plasma gasification, because it not only produces the more volumetric plasma jet than the linear type but also has a much longer lifetime than the step type.
플라즈마를 이용한 FGR 기반 저 NOx 연소 타당성 연구
김관태(Kwan-Tae Kim),이대훈(Dae Hoon Lee),차민석(Min Suk Cha),길상인(Sang-In Keel),윤진한(Jin-Han Yun),김동현(Dong Hyun Kim),송영훈(Young-Hoon Song) 한국연소학회 2007 한국연소학회지 Vol.12 No.3
A combined hydrogen generator of plasma and catalytic reformer was developed, and was applied to stabilize unstable flame of 200,000 Kcal/hr LPG combustor. The role of the plasma reformer was to generate hydrogen in a short period and to heat-up the catalytic reformer during the start-up time. After the start-up period, the catalytic reformer generates hydrogen through steam reforming with oxygen (SRO) reactions. The maximum capacity of the hydrogen generator was enough 100 lpm to stabilize the flame of the present combustor. In order to reduce NOx and CO emissions simultaneously, 1) FGR (Flue Gas Recirculation) technique has been adopted and 2) the hydrogen was added into the fuel supplied to the combustor. Test results showed that the addition of 25 % hydrogen and 30 % FGR rate lead to simultaneous decrease of CO and NOx emissions. The technique developed in the present study showed good potential to replace NH₃ SCR technique, especially in the small-scale combustor applications.