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황토를 지지체로 사용한 중온건식 아연계 탈황제의 반응특성 연구
박노국,정용화,이종대,류시옥,이태진 한국에너지학회 2003 에너지공학 Vol.12 No.4
본 연구에서는 황토를 지지체로 사용한 고온연료가스 정제용 아연계 탈황제의 성능시험을 수행하였다. 산화아연과 황토를 75:25의 비율로 혼합하여 탈황제를 제조하였고 황화/재생 반응속도, 황수용능력, 내마모성을 조사하였다. 탈황 및 재생반응실험은 중온(황화/재생 : 48$0^{\circ}C$/58$0^{\circ}C$)에서 수행되었다. 황토를 지지체로 사용한 아연계 탈황제는 장기사이클실험중에 나타나는 급속한 비활성화가 억제되었으며 반응속도, 황수용능력, 내구성 그리고 내마모성이 개선되었다. 황수용능력은 약 19gS/100g sorbent정도로 10 cycle 까지 유지되었으며, 내마모도는 AI=19.1%정도였다. 아연계 탈황제의 성능개선은 황토에 함유된 금속산 화물(Fe$_2$O$_3$, $Na_2$O, MnO$_2$)의 영향으로 판단된다. 이들 결과로부터 황토를 지지체로 사용하여 중온건식 아연계 탈황제의 특성을 개선할 수 있음을 확인하였다. The peformence tests of zinc-based desulfurization sorbents using the yellow earth as support for the hot gas clean up were carried out. The zinc-based sorbent with 25 wt% yellow earth was prepared, and their properties such as the reaction rate, the sulfur capacity and the attrition resistance, were investigated. The reactivity tests for hot gas desulfurization was performed at middle temperatures (sulfidation/regeneration:480$^{\circ}C$/580$^{\circ}C$). During multi-cyclic desulfurization, the deactivation of zinc-based sorbent was decreased by the addition of yellow earth, and their efficiency was enhanced. The ZnO/yellow earth sorbent had high reactivity, good regenerability, long-term durability (about 19 gS/100 g sorbent for 10-cycles) and high attrition resistance (AI=19.1%). It was concluded that the peroperties of zinc-based sorbent were improved by metal oxides (Fe$_2$O$_3$, Na$_2$O, MnO$_2$, etc) in the yellow earth. From these results, it was confirmed that the desulfurization properties of zinc-based sorbents at middle temperatures could be improved by the yellow earth using as support.
$H_2S$제거를 위한 ZnO-$Al_2O_3$ 탈황제의 제조 및 반응특성 연구
박노국,이종욱,류시옥,이태진,김재창 한국에너지학회 2002 에너지공학 Vol.11 No.2
석탄가스화 복합발전용 고온건식 탈황제의 반응성을 개선하기 위하여 $Al_2$O$_3$를 지지체로사용한 ZnO/Al$_2$O$_3$ 탈황제를 제조하고 반응특성을 조사하였다. ZnO/Al$_2$O$_3$의 성분함량 및 소성온도에 따른 물리화학적 구조변화를 XRD로 관찰하였고 ZnO의 소결 및 열화로 인한 활성저하를 $Al_2$O$_3$의 함량과 소성온도를 변화시켜 개선할 수 있음을 탈황 및 재생반응실험을 통하여 확인하였다. 마지막으로 첨가제를 함유한 ZnO/Al$_2$O$_3$ 탈황제의 내구성실험에 의한 고온건식 탈황제로의 사용가능성을 실험적으로 확인하였다. Advanced zinc-based sorbents, ZA, for Hot Gas Desulfurization (HGD) process in Integrated Gasification Combined Cycle (IGCC) systems were formulated with $Al_2$O$_3$ as support to enhance the reactivity and their reactive characteristics was also investigated in this study. Changes in the physical and chemical properties of the sorbents based on both the mole ratios of ZnO/Al$_2$O$_3$ and the calcination temperatures were examined by a XRD. The results obtained in our desulfurization-regeneration cycle tests demonstrated that degradation of sorbents due to the heat generation could be improved through the optimization of the $Al_2$O$_3$ contents and of the calcination temperatures. From the durability study it is concluded that the prepared ZA sorbents with additives have the desirable features for HGD.
The growth of ZnO nano-wire by a thermal evaporation method with very small amount of oxygen
박노국,한기보,이종대,류시옥,이태진,장원철,치헝창 한국물리학회 2006 Current Applied Physics Vol.6 No.1l
Formation of ZnO nano-wire by a thermal evaporation method was studied in this work. The ZnO nano-wire has grown from metal Zn granule under O2 environments at high temperature. We investigated the behavior of the ZnO nano-wire growth with the change ofoxygen content in carrier gas (N2). Zn granules were placed in an alumina boat. The boat was inserted in a horizontal tube furnace. Thefurnace temperature was maintained in the range of 7001000.C for 0.52 h. The oxygen contents were adjusted from 0.5 to 5 vol% byonly at 1.62.0 vol% O2 conditions. ZnO nano-wire did not grow when the oxygen content is either 0 vol% or higher than 2.5 vol%. Fromthese results, it was conrmed that oxygen content in the thermal evaporation method is an important factor for the synthesis of the ZnOnano-wire.
박노국,이우천,Park, Roh-Gook,Lee, Woo-Chun 한국벤처창업학회 2010 벤처창업연구 Vol.5 No.4
현대의 기업 경쟁력은 경쟁력 있는 신제품 개발이 필수적이다. 기업이 지속적인 성장을 하기 위해서는 신제품을 개발해야 한다. 본 논문에서는 제품 설계의 고객의 목소리를 충분히 반영한 제품을 제안하였다. 1차 설계에서 Kano의 매력 품질특성을 반영하여 설계하였고, 2차 설계에선 Kano 품질 특성에서 일원적 품질특성이 Timko가 제안한 고객만족지수 방법을 통하여 찾아진 고객 요구를 만족하는가를 분석하였다. 또한 Kano의 매력품질을 찾는 기법과 Timko의 고객만족지수를 찾는 기법을 신제품 개발에 적용하면 매우 효과적으로 문제를 해결할 수 있다.
박노국 한국산업경영시스템학회 2004 한국산업경영시스템학회 학술대회 Vol.2004 No.춘계
For the activation of the Sanhakyeon Consortium, the role of local universities is critical. It is necessary for the university professionals to bring forth detailed alternative plans to upgrade the technological power of the inferior local small & medium enterprises. This means that the local self-governing bodies must database local universities and professional personnel. As a result, the professionals that are needed by enterprises must be designated to those businesses. Also, the regional small and medium enterprises must develop research personnel to enhance their power of technology. To make this possible, the participating companies of Sanhakyeon Consortium should support the students who are participating in the Consortium with research funds, and also should consider how these students can work for those companies after graduation. Finally, the local self-governing bodies must support Sanhak’s cooperative research on locally specialized industries, by forming a technology-human power network between local universities and small & medium enterprises.