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Ru-CuO/ZnO/Al2O3 촉매를 이용한 Methanol 합성 연구
박현서,이 훈 한국폐기물자원순환학회 2014 한국폐기물자원순환학회지 Vol.31 No.4
Methanol is one of the clean burning fuel with versatile applications. As a combustion fuel, it provides extremely low emissions. Methanol can also be used as a primary transporation fuel or a fuel additive and expecially as a raw metalial for methyl t-butyl ether. Methanol synthesis from synthetic gas was carried out in the Ru-CuO/ZnO/Al2O3 catalytic system. The influence of various factors, such as the reaction temperature, the concentration of ruthenium (Ru) and the reaction pressure was discussed, respectively, and the most preferred condition were obtained. The results showed that metanol synthesis could be prepared from carbon monoxide and hydrogen under reaction conditions. The reaction of Ru-CuO/ZnO/Al2O3 catalyst (E-catalyst) was operated most preferably at 160oC and 40 bar.
박현서 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
광전기화학은 전기화학의 세부분야로 광에너지를 이용하여 전극에서 일어나는 산화, 환원 반응을 연구하고 응용하는 학문이다. 예를 들어 광화학적 물분해 수소생산, 염료감응형 태양전지, 광전기화학적 발광 등 태양광에너지를 변환하여 다른 형태로 저장하거나 활용하기 위한 다양한 광전기화학 연구가 지난 40여년간 활발히 계속되고 있다. 광전기화학은 또한 태양전지의 전극 혹은 반도체 물질의 물리-화학적 물성 등을 연구하기 위해 표면 전기화학 분석과 광화학을 결합한 분석도구로서 유용하게 쓰일 수 있다. 본 발표에서는 위에서 언급한 다양한 광전기화학적 분석과 개발을 위해 필요한 광전기화학의 기초 개념과 광전류의 측정, 반도체 표면반응의 분석 등 기초 실험기법을 소개하고, 실험을 통해 얻은 자료를 분석하는 방법을 다룰 것이다.
사람과 쥐에서 식이내 n6 와 n3 불포화지방산이 혈장 지질조성에 미치는 영향
박현서,남정혜,최주선 慶熙大學校 1991 論文集 Vol.20 No.-
To compare the plasma lipid-lowering effect of dietary n6 and n3 polyunsaturated fatty acids(PUFA) in human and rats, ten college women were divided into 5 groups and treated for 5 weeks with 1 week interval between treatments and subjects serving as their own controls. Male Sprague Dawley rats were divided into 3 groups and fed the experimental diets for 6 weeks. The experimental diets were corn oil diet for n6 linoleic acid, perilla oil diet for n3 α-linolenic acid and fish oil diet for n3 eicosapentaenoic acid (EPA) and docosahexaenoic acid(DHA). Dietary fat was supplied at 30% Cal and modified to give the total amount of satu-rated fatty acid(SFA) and monoenoic acid(MEA)at constant level. In human, there was no significant effect on plasma cholesterol (Chol)level by different PUFA. However, on a gramforgram basis, there was a trend that the decrease in plasma Chol was proportionate to the degree of fat unsaturation. HDL―Chol content was significantly increased only in fish oil diet but no change in the relative proportion of its chemical components of HDL. In rat, plasma Chol and HDL―Chol levels were significantly lowered by fish oil than corn oil and perilla oil. Plasma Chol―lowering effect in human and rats was greater by n3 EPA and DHA than n6 linoleic acid. Plasma triglyceride(TG)level in human was significantly lowered only in fish oil diet but no significant effect on the relative proportion of TG in VLDL. Plasma TG in rats was significantly decreased by both perilla oil and fish oil than by corn oil. Therefore, plasma TG―lowering effect was in the order of n3 EPA+DHA>n3 αlinolenic acid >n6 linoleic acid. In conclusion, perilla oil and fish oil which contain n3 series PUFA may have important nutritional benefit in the prevention and treatment of atherosclerotic disease.
박현서,박찬훈,안지환,박진구,전소연 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
Ca(OH)2와 Na2CO3의 반응으로 아라고나이트 침강성 탄산칼슘을 합성하였다. 반응 과정에서 온도변 화 및 첨가 이온에 따른 아라고나이트 생성 거동을 관찰하였으며, 균일침전 반응에 의한 아라고나이트생성수율, 및 aspect ratio의 변화를 조사하였다. 또한 합성된 아라고나이트 탄산칼슘의 phase, morphology, 백색도 등의 물성을 평가하였다.