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화학적 순환 연소를 위한 CoOx/CoAl2O4 산소공여매체의 산화 환원 특성
정진혁 ( J. H. Jeong ),박종원 ( J. W. Park ),윤왕래 ( W. L. Yoon ) 한국공업화학회 2003 공업화학 Vol.14 No.4
매체 순환 연소를 위한 Co 계열의 산소공여매체(CoO_x/CoAl_2O_4)를 제조하여 기준 매체물질인 NiO/NiAl_2O_4와 비교하여 산화/환원 특성을 분석하였다. 우선 각 spinel 담체의 경우, XRD 분석 결과 소성온도가 높아지면 NiO에 비해 NiAl_2O_4의 분율이 높아지게 되며, Co의 경우에는 CoAl_2O_4의 결정성이 증가함을 알 수 있었다. 담지된 spinel의 경우, NiO/NiAl_2O_4은 산화/환원 반복실험에서 그 활성이 점차적으로 감소하는 반면, CoO_x/CoAl_2O_4의 경우는 수 차례의 반복실험에도 활성에 영향을 받지 않음을 H_2TPR/TPO 분석을 통하여 확인하였다. TGA, CH_4-TPR/MS 및 TPO/MS의 분석 결과, CoO_x/CoAl_2O_4가 산소 전달 능력 및 반응활성이 상대적으로 높은 것으로 나타났으며, 결국 탄소 침적 저항 및 메탄의 완전산화반응 특성이 우수할 것으로 기대된다. As an oxygen carrier for chemical-looping combustion (CLC), Co-based metal oxide has been prepared and its redox characteristics were compared with a reference carrier NiO/NiAl_2O_4. With spinel support alone, it was revealed from the XRD that both the NiAl_2O_4/NiO ratio and the degree of crystallinity in CoAl_2O_4 increased with increased calcination temperature. In case of the supported spinels (CoO/CoAl_2O_4, NiO/NiAl_2O_4), the redox capacity of the NiO/NiAl_2O_4 gradually decreased with number of repeated cyclic redox tests, but the capacity of CoO/CoAl_2O_4 remained nearly constant. In addition, it has been demonstrated from TGA, CH_4-TPR/MS and TPO/MS studies that the oxygen transfer capacity as well as reactivity were relatively higher in CoO/CoAl_2o_4 than in NiO/HiA1_2O_4, indicating a better resistance to coke deposition.
세가지 형태로 변신이 가능한 비대칭 X8 무인비행로봇의 제작
정진혁(Jin-Hyuk Jeong),하성우(Seong-Woo Ha),윤병모(Byeung-Mo Yun),김경호(Kyung-Ho Kim),허경무(Kyung-Moo Huh) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.11
Unmanned flying robots have been used recently in many difficult situations. One of the major issues in this area is the problem of how long these unmanned flying robots can perform a given task successfully. For this, the development of a light body and high-efficiency power supply has been executed widely, but we do not as yet have the complete solution. In this paper, we propose a form of Multi-Copter X8, which can transform into other types to further improve these problems. The proposed robot has a 3-type modification capability, which can produce a more enhanced energy saving effect by reducing power consumption.
정진혁(Jinhyuk Jeong),한상현(SangHyun Han),서석현(Sukhyun Seo) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
In this paper, through the document analyzing the software design work, it clarifies the work items according to the software design, the order and the structure and relationship of the design information handled in each design work, and the design order and design information to the design scenario and design form We propose a standardized model of design work. As an effort to improve software productivity, the need for standardization from the early stages of software development to design methods is increasing due to the development of continuous theories of software engineering and the spread of standardized techniques. Therefore, this study proposed a tool to develop software efficiently by performing standardization experiment of software design procedure.
축구클럽 활동 중년남성의 건강체력 연령과 생활만족도에 관한 연구
정진혁(Jin Hyuk Jeong),최종인(Jong In Choi),임병규(Byung Kyu Lim) 한국발육발달학회 2010 한국발육발달학회지 Vol.18 No.4
The aims of this study are two things. One is to find the general features which are the important factors of health physical fitness age: these factors are related to the aging process of middle aged group participating in soccer club. The other is to clarify how their regular exercise affects on the indexes of their health physical fitness age and their life satisfaction index. The objective participants are exercise group (regularly plays soccer, 31 members) and non-exercise group (sedentary occupations or office workers, 34 members) of 65 people who are 40s. The method of this study is to compare difference between exercises group and non-exercises group in the categories of the health physical fitness age(HPFA) and the life satisfaction. The results of this study are as follows. First, it shows the significant differences between two groups as regarded to %fat, grip strength, sit and reach test, push-ups and 1,600 m run. Second, the result of major counts of HPFA shows that the HPFA for exercise group is 41.98 yrs, and non-exercise group shows 43.86 yrs of HPFA. Comparing HPFA to their chronological age(CA), the exercise group is 1.95 yrs younger, but non-exercise group has no difference. Third, life satisfaction examining shows that the significant differences between two groups in categories of "satisfaction of health", "satisfaction of social life", and "positive attitude towards the aging process" among life satisfaction subordinate factors. In summary, the levels of health physical fitness age and life satisfaction of exercise group are partially higher than those of non-exercise group. Additionally, continuous exercise group shows relatively higher life satisfaction than the other group. Therefore, it seems that regular exercises delay the normal aging process, and it extends their life span instead.
Ni-Ru 계열 촉매 상에서의 CH<sub>4</sub> 수증기 개질 반응
정진혁(Jeong, Jin Hyeok),이정원(Lee, Jung Won),이득기(Lee, Duek Ki),김동현(Kim, Dong Hyun),서동주(Seo, Dong Joo),서유택(Seo, Yutek),윤왕래(Yoon, Wang Lei) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
본 연구에서는 기존 니켈 활성성분만의 알루미나담지 촉매에 비해 고온에서의 수소를 사용한 환원 전처리 과정을 거치지 않고도 높은 반응활성을 나타내며, 반응 중 탄소침적에 대한 촉매 저항성에서도 우수한 결과를 나타낸 루테늄-니켈 촉매에 대해보고 하고자 한다. 메탄 수증기 개질 반응을 통해, 루테늄을 최종적으로 담지한 알루미나 담지니켈계 촉매는 별도의 전처리과정 없이 650?C에서부터 높은 반응성을 보였으며, 루테늄과 니켈을 동시에 담지한 경우보다 더 우수한 활성을 나타내었다. Ru의 담지량을 달리한 실험에서는RU(0.5)/Ni(20)/Al₂O₃ 촉매가 가장 높은 활성을 보였다. H₂-TPR 분석 결과, Ru(0.5)/Ni(20)/A1₂O₃촉매의 경우 세 가지 환원 피크가 나타났으며, Ni(20)/A1₂O₃촉매와 비교해 볼 때, 저온(<130?C)에서 환원가능한 RUO₂의 존재를 확인할 수 있었다. 담지된 RU은 분산도가 높아, XRD분석 결과에서 Ru이나 RuO₂의 특성 피크가 존재하지 않았다. 또한 650?C에서 10시간 개질반응 후 얻어진 촉매에 대해 O₂-TGA를 분석한 결과, Ni(20)/Al₂O₃촉매는 -7.2wt% 정도의 큰 무게 감소를 보였으며, 이는 촉매 표면에 생성된 carbon tube에 의한 것임을 SEM 분석을 통해 알 수 있었다 이에 반해, Ru(0.5)/Ni(20)/Al₂O_ 촉매는 O₂-TGA시 0.3wt% 정도 무게 증가에 그쳤으며, SEM 분석상 carbon tube의 생성이 크게 억제되었음을 알 수 있었다.
정진혁(JinHyuk Jeong),한상현(Sang Hyun Han),김정태(Jeong Tae Kim),서석현(Sukhyun Seo) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
Using the smartphone application, IoT system designed for single-person households and elderly living alone. The main functions that can be provided are automatic and manual control of curtains, lights, dehumidifiers, temperature / humidity / illumination automatically / manually and in order to prevent the death of solitude, we added an internal CCTV and focused on checking the status of the inside of the house with the application of smart phone.