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Cascade-Neuro-Fuzzy-PID 적응제어에 대한 연구
유민수,선우창신 全南大學校 觸媒硏究所 2003 觸媒硏究 論文集 Vol.24 No.-
The Cascade-Neuro-PID controller has been developed and applied for the gas heating process. The parameters of the master PID controller were obtained as the outputs of the neural networks using system jacobian calculated from neural identifier. To do not fall in local minimum point optimized parameters of Neuro-PID controller, learn rate of neural network was calculated by fuzzy logic algorithm. In simulation results, the Cascade-Neuro-Fuzzy-PID controller has shown the good robust control response characteristics without overshoots.
이산화탄소에 의한 메탄 개질반응에서 니켈계 담지촉매의 탄소 침적에 관한 연구
조영복,선우창신,김상채,유의연 全南大學校 觸媒硏究所 1998 觸媒硏究 論文集 Vol.20 No.-
The reforming of methane by carbon dioxide is studied over nickel based catalysts, which compared the influence of the support in catalyst activity and carbon deposition. The experiments were carried out at atmospheric pressure using a fixed bad flow reactor. The catalytic activity and carbon deposition is influenced by support. The Ni/α-Al₂O₃showed high methane conversion. The Ni/La₂O₃ showed high methane conversion, but the reactor was plugged in 15 h. The carbon deposition was observed in all nickel based catalysts. Compared to Ni/α-Al₂O₃, Ni/La₂O₃, catalyst showed higher whisker carbon formation. Whisker carbon was not observed in the Ni/MnO₂. The carbon deposition of the nickel based catalysts increased in the order MnO₂〈SiO₂〈α-Al₂O₃〈TiO₂〈La₂O₃. The carbon deposition on the catalysts was affected by reaction conditions such as temperature, molar ratio(CO₂/CH₄).
Ⅷ족 전이금속 촉매를 이용한 메탄에 의한 이산화탄소의 개질반응
조영복,유의연,선우창신 全南大學校 觸媒硏究所 1997 觸媒硏究 論文集 Vol.19 No.-
Carbone dioxide reforming by methane was studied using a fixed bed reactor under an atmosphere. Transition metal catalysts and noble metals supported on α - AI₂O₃were compared. The order of activity was Ni> Pd> Co. The effects of metal additives on Ni/α - AI₂O₃were investigated for activated catalysts. The order of activity was Co > Cu > Fe. The catalyst performance depend on the CO₂/CH₄ratio and the reaction temperature.
박형남,서호준,선우창신 全南大學校 觸媒硏究所 1998 觸媒硏究 論文集 Vol.20 No.-
The degradation of HDPE was carried out at 350, 400, 450, 500°C by semi-batch type reactor using H-Mordenite as a solid acid catalyst and thermally without any catalyst. The effects of catalytic bad also were investigated in liquid phase contact and in vapor phase contact. The carbon number of the liquid product from thermal degradation was broadly distributed in the range of ??. However, which HM, it was distributed mostly in the range of ??. For vapor phase contact, the yield of liquid products was much lower(52.6wt%) than thermal degradation(63.1wt%) and a solid acid catalyst randomly degraded HDPE into light fuel oil with an improved rate.