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MEASUREMENT OF SOOT OXIDATION WITH NO2-O2-H2O IN A FLOW REACTOR SIMULATING DIESEL ENGINE DPF
송순호,정진우,이재휘,전광민 한국자동차공학회 2008 International journal of automotive technology Vol.9 No.4
Understanding the mechanism of carbon oxidation is important for the successful modeling of diesel particulate filter regeneration. Characteristics of soot oxidation were investigated with carbon black (Printex-U). A flow reactor system that could simulate the condition of a diesel particulate filter and diesel exhaust gas was designed. Kinetic constants were derived and the reaction mechanisms were proposed using the experimental results and a simple reaction scheme, which approximated the overall oxidation process in TPO as well as CTO. From the experiments, the apparent activation energy for carbon oxidation with NO2-O2-H2O was determined to be 40±2 kJ/mol, with the first order of carbon in the range of 10~90% oxidation and a temperature range of 250~500oC. This value was exceedingly lower than the activation energy of NO2-O2 oxidation, which was 60±3 kJ/mol. When NO2 exists with O2 and H2O, the reaction rate increases in proportion to NO2. It increases nonlinearly with O2 or H2O concentration when the other two oxidants are fixed.
비전 인식 기반의 검사 기능을 갖는 FDM 방식 3D 프린터 시스템 개발
송순호(Sunho Song),이해연(Hae-Yeoun Lee) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.10
3D printing is a popular technology that allows anyone to quickly and easily create products at home or office, but product errors can occur due to various causes during time consuming and expensive 3D printing. In this paper, In this paper, we describe the development of an FDM type 3D printer that improves performance by inspecting in real-time through vision recognition to determine whether errors occur during 3D printing. A system structure for error inspection and control and a vision recognition algorithm that detects errors by comparing real-time acquired images and expected model output images are presented. Also, since recognition errors may occur due to reflection of external lights during actual printing, a stable image acquiring method using shielding and LED lighting is explained. An FDM type 3D printer with vision recognition based inspection function was developed, and through performance analysis, it was confirmed that 100% recognition is possible in abnormal printing whose size is 2mm or more.
수소 생성을 위한 고정상 메탄 매체 순환 개질 시스템 모델링
하종주,송순호 한국수소및신에너지학회 2017 한국수소 및 신에너지학회논문집 Vol.28 No.5
A study on the modeling of the methane Chemical Looping Reforming system was carried out. It is aimed to predict the temperature and concentration behavior of the product through modeling of oxygen carrier fixed bed reactors composed of multiple stacks. In order to design the reaction system, first of all, the flow rate of the hydrogen to be produced was calculated. The flow rate ratio of the oxidation/reduction reactor was calculated considering the heat of reaction between adjacent reactors. Finally, in this paper, kinetic model including empirical coefficients was suggested.