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노성래(Seong-Rae No),곽왕신(Hwang-Sin Ghwak),김두중(Du-Joong Kim),백선희(Seon-Hee Baek) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.7
전력도매가격에 해당하는 SMP는 매 시간마다 산정하여 하루에 24개가 존재한다. 태양광 발전은 해가 뜬 시간에 발전량이 집중되어 하루 발전량이 약 4시간이고, 경도 및 위도별로 발전량이 집중되는 시간은 조금씩 차이 난다. 이에 정산단가와 이용률을 활용하여 태양광발전소의 입지(그린에너지 지가)를 분석한 결과, 전남과 강원도가 높고 경기도가 가장 낮았다.
철 기반 촉매의 Fischer-Tropsch 합성에서 γ-Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> 혼합 지지체 조성의 영향
민선기 ( Seon Ki Min ),노성래 ( Seong-rae No ),유성식 ( Seong-sik You ) 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.3
Fischer-Tropsch synthesis is the technology of converting a syngas (CO+H<sub>2</sub>) derived from such as coal, natural gas and biomass into a hydrocarbon using a catalyst. The catalyst used in the Fischer-Tropsch synthesis consists of active metal, promoter and support. The types of these components and composition affect the reaction activity and product selectivity. In this study, we manufactured an iron catalyst using γ-Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> mixed support (100/0 wt%, 75/25 wt%, 50/50 wt%, 25/75 wt%, 0/100 wt%) by an impregnation method to investigate how the composition of γ-Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> mixed support effects on the reaction activity and product selectivity. The physical properties of catalyst were analyzed by N<sub>2</sub> physical adsorption and X-Ray diffraction method. The Fischer-Tropsch synthesis was conducted at 300 ℃, 20bar in a fixed bed reactor for 60h. According to the results of the N<sub>2</sub> physical adsorption analysis, the BET surface area decreases as the composition of γ-Al<sub>2</sub>O<sub>3</sub> decreases, and the pore volume and pore average diameter increase as the composition of γ-Al<sub>2</sub>O<sub>3</sub> decreases except for the composition of γ-Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> of 50/50 wt%. By the results of the X-Ray diffraction analysis, the particle size of α-Fe<sub>2</sub>O<sub>3</sub> decreases as the composition of γ-Al<sub>2</sub>O<sub>3</sub> decreases. As a result of the Fischer-Tropsch synthesis, the CO conversion decreases as the composition of γ-Al<sub>2</sub>O<sub>3</sub> decreases, and the selectivity of C1-C4 decreases until the composition of γ-Al<sub>2</sub>O<sub>3</sub> was 25 wt%. In contrast, the selectivity of C5+ increases until the composition of γ-Al<sub>2</sub>O<sub>3</sub> is 25 wt%.
방열 아크릴 점착제의 제조를 위한 개질 알루미나의 효과
오지환(Ji-Hwan Oh),강신혜(Sinhye Kang),리시앙수(Li Xiangxu),노성래(Seong-Rae No),유성식(Seong-Sik You),조을룡(Ur-Ryong Cho) 한국고분자학회 2016 폴리머 Vol.40 No.5
용액중합을 통해 합성한 아크릴 점착제에 실란커플링제로 전처리한 알루미나(30, 60, 90 wt%)를 혼합하여 열전도성 복합체를 제조한 후 접착특성 및 열전도도를 조사하였다. 접착특성은 180° 박리강도, 유지력 및 초기점착력을 측정하였고, 열전도도는 laser flash 법을 이용하여 측정하였다. 박리강도와 초기점착력은 알루미나의 함량의 따라 감소하였고, 유지력은 향상되는 경향을 보였으며, 열전도도는 크게 향상되었다. 전처리한 알루미나를 사용한 점착테이프는 전처리하지 않은 알루미나를 사용한 것에 비해서 상대적으로 점착력이 낮아지며, 열전도도는 10% 가량 향상되었다. 이는 커플링제로 인하여 점착제 매트릭스와 알루미나 필러 사이의 계면결합이 증가한 것으로 추정된다. 개질된 90 wt%의 알루미나를 포함한 경우 열전도도는 0.242 W/mK 값을 나타내어 알루미나를 포함하지 않은 점착테이프에 비해 크게 향상됨을 확인할 수 있었다. Thermal conductive acrylic pressure sensitive adhesives (PSA) were synthesized by solution polymerization. The adhesive was mixed with (30, 60, 90 wt%) alumina (Al) pretreated by silane coupling agent. Adhesion properties of the PSA/Al composites were investigated by measuring peel strength, holding power, and initial tack. Thermal conductivity was measured by a laser flash analyzer. Peel adhesion and intial tack decreased with the alumina content, and holding power tended to increase. Adhesion properties of adhesive tape using modified alumina decreased compared with using pristine alumina, and thermal conductivity was increased by 10%. It was confirmed that the interfacial bonds between the PSA and the modified alumina increased because of silane coupling agent. Thermal conductivity of adhesive sheet containing 90 wt% modified alumina as filler was 0.242W/mK, which was significantly improved compared to pure PSA sheet.