Ni/γ - Al2O3 촉매상에서 n - Heptane 의 수소첨가 분해반응에 관한 연구

김경림,정광덕 한국화학공학회 1985 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.23 No.6

Ni/γ-Al₂O₃촉매상에서 n-heptane의 수소첨가 분해반응을 350℃-400℃, 10^5Pa-50×10^5Pa의 범위에서 행하였다. 촉매는 500℃, 30×10^5Pa의 조건에서 수소를 53L/hr로 보내주어 환원시킴으로써 활성화 되었다. 반응의 주 생성물은 methane과 hexane이었고 이 반응의 율속단계는 350℃에서는 표면반응과 생성물의 탈착, 375℃에서는 생성물의 탈착이었다. 이 반응의 차수는 n-heptane에 대해서 외관상 1차였고 외관상 활성화 에너지는 26.13㎉/mole이었다. The hydrogenolysis of n-heptane was studied over Ni/γ-Al₂O₃catalysts in a fixed bed flow reactor. The ranges of operating conditions were between 350℃ and 400℃ in temperature and from 10 to 50×10^5 Pa in total pressure, respectively. The catalysts were activated by reduction with the flow of 53 L/hr of H₂ at the temperature of 500℃ and the pressure of 30×10^5 Pa. The main products were methane and hexane. The rate determining step was found to be surface reaction and desorption of the products at the temperature of 350℃, and it was desorption of the products at the temperature of 375℃. The apparent reaction order was first with respect to the concentration of n-heptane and the apparent activation energy was 26.13㎉/mole.

Alumina 담지 Molybdenum 계 촉매상에서 수소첨가 탈황특성 : 촉매상과 활성의 관계 Relation between Catalyst Phase and Activity

김경림,박해경,이진구 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.2

촉매상에 따른 탈황활성의 변화를 살펴보기 위하여 산화, 환원, 질화, 탄화, Mo, CoMo, NiMo/γ-Al₂O₃촉매상에서 dibenzothiophene 탈황활성을 비교분석하였다. 질소 흡작분석결과 제조방법에 따라 γ-Al₂O₃담체 자체의 기하학적인 특성이 변함을 알 수 있었다. 등온 고정층 연속흐름 반응기에서 dibenzothiophene 탈황실험을 하였다. 진화물 및 탄화물의 탈황활성은 비교적 안정되었으나, 산화물, 환원물, 황화물은 반응시간이 경과함에 따라 탈황활성이 저하되었다. 질화물의 경우 Mo/γ-Al₂O₃에 Co와 Ni를 첨가할 경우 활성억제효과를 가져왔으며, 질화물을 전조물로하여 제조한 탄화물은 Co와 Ni를 첨가였을 때 활성이 우수하였다. 환원물 촉매의 경우 CoMo, NiMo/γ-Al₂O₃ 촉매와 Mo/γ-Al₂O₃ 촉매는 반응변수(온도, 접촉시간)가 변화함에 다른 활성의 변화특성을 보였다. 탈황활성이 우수한 황화 CoMo/γ-Al₂O₃(CoO 3 wt%, MoO₃ 12wt%)와 질화 Mo/γ-Al₂O₃(MoO₃ 12wt%)는 반응변수의 변화에 따라 비슷한 활성과 선택도를 보였다. A number of alumina-supported molybdenum-based catalysts oxides, metals, sulfides, nitrides and carbides were prepared and investigated for the relation between catalyst phase and hydrodesulfurization activity. From the N₂ adsorption an analysis, it was established that the texture properties of γ-Al₂O₃ support were changed by the synthesis method. The hydrodesulfurization of dibenzothiophene over these catalysts was studied in an isothermal fixed-bed continuous-flow reactor. The activities of nitrides and carbides were not significantly changed but oxides, metals and sulfides lost their activities rapidly during the reaction. The addition of cobalt and nickel deteriorated the activities of nitrides but enhanced those of carbides. Among the metals the unpromoted molybdenum showed different reactivity against the promoted one with the variation of reaction parameters(temperature, contact time). Both sulfided CoMo/γ-Al₂O₃(CoO 3wt%, MoO₃ 12wt%) and nitrided Mo/γ-Al₂O₃(MoO₃12wt%) had shown similar activities and selectivities.

保羅國의 형성과 변천

김경림 부경역사연구소 2020 지역과 역사 Vol.- No.47

This paper estimates the formation and transition of Bora, one of the eight states in Posangpalguk of the Gaya Confederacy. Bora was a maritime power that grew by taking advantage of fertile land and trade in the Sampo River region. Following the fall of Mokjiguk, it belonged to a different culture from Baekje, which was called Shinmijeguk, and it was a force comparable to Haenam Shinmiguk. However, as Baekje grew, the leadership of the northeast Asian coastal route was lost, and negotiations with China declined due to internal turmoil in China, and it is assumed that Shinmijeguk shifted its focus to trading with Japan. Meanwhile, when the Gyeongnam maritime forces attempted to invade Alla, the Jeonnam maritime forces, including Bora, did not have any direct reason for the invasion, but participated in the Posangpalguk War in order to utilize the trade network of the Gyeongnam maritime forces with Japan. In view of the spread of Ongwan tombs throughout the Sampo River region including Shijong-myeon, it seems that the war did not result in a severe blow to the area. After that, by the time of King Geunchogo, Bora had a friendly relationship with Baekje and continued to grow, but gradually collapsed due to Baekje's policy of subjugation to Mahan. 본고는 포상팔국 중 하나인 보라국의 형성과 변천을 추정하였다. 보라국은 삼포강 일대의 비옥한 토지와 교역에 유리한 위치를 배경으로 성장한 해상세력이다. 이들은 목지국 멸망 이후 신미제국이라는 백제와는 다른 문화권에 속하였으며, 해남 신미국과 견줄 수 있는 세력이었다. 그러나 백제가 성장하면서 동북아연안항로의 주도권을 빼앗겼고 연쇄적으로 발생한 중국 내부 혼란에 따라 對中교섭이 쇠퇴하게 되자, 신미제국은 對日교역으로 무게중심을 옮긴 것으로 예상된다. 한편 경남지역의 해상세력이 안라국 침공을 도모하자, 보라국을 비롯한 전남 해상세력은 경남지역 해상세력이 가진 일본과의 교역루트를 활용하기 위해 포상팔국전쟁에 가담한다. 시종면을 비롯한 삼포강 일대에 옹관묘가 확산되는 모습으로 보았을 때, 전쟁의 결과로 큰 타격을 입지 않은 것으로 추정된다. 이후 보라국은 근초고왕 대에 이르러 백제와 우호적 관계를 맺었고 지속적인 성장세를 보이다가, 백제의 마한복속정책에 따라 점차 무너지게 되었다.

황화 Ni-Mo/γ-Al₂O₃ 촉매상에서 m-Cresol의 수소첨가 탈산소반응에 관한 연구

김경림,백순원 연세대학교 대학원 1990 延世論叢 Vol.26 No.1

Abstract The hydrodeoxygenation of m-cresol dissolved in n-heptane was studied over sulfided Ni-Mo/r-Al2O3 catalyst at the range of the temperature between 473K and 673K, the total pressure between 10×105pa and 50×105pa and the contact time between 0.015 g cat.hr/ml feed and 0.03 g cat.hr/ml feed in a fixed bed reactor. The yield of m-cresol hydrodeoxygenation increased with the increase of total pressure and temperature. Methylcyclohexane has more produced than toluene with the increase of temperature but converted to low hydrocarbons by secondary hydrogenolysis reaction over 623K. At the range of the temperature between 523k and 673k and at the total pressure 30×105pa, the hydrodeoxygenation of m-cresol was 1st order with respect to the concentration of m-cresol and its apparent activation energy was 10.55kcal/mole.

타카야수 동맥염 4형으로 진단한 폐동맥염에 동반된 폐동맥 고혈압 1례

김경림,양태현,류종철,김두일,김동수,정병오,김주인,최석진 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.12

γ-Alumina로 지지된 백금촉매하에서 일산화탄소 산화반응에 관한 연구

김경림 연세대학교 산업기술연구소 1982 논문집 Vol.14 No.1

This study is concerned with the reaction of carbon monoxide oxidation on γ-alumina supported platinum catalyst and it is studied in terms of various reaction conditions in tube reactor. Carbon monoxide concentration varied from 2 to 4%, that of oxygen from 1 to 5% and that of GHSV from 10,000 to 50,000h-?? The temperature range was from 200 to 600 ˚C. Nitrogen was used for balance. There were no problems of poisoning, sintering and fouling on platinum catalyst. On these above reaction conditions, nitrogen oxide, which could be produced as a result of side reaction, did not appear. The conversion yield of carbon monoxide oxidation decreased with increasing GHSV and increased with increasing carbon monoxide concentration. On the reaction conditions that GHSV was 20,000h-??, that carboron monoxide concentration was 2%, that temperature varied from 200 to 400 ˚C and that oxygen concentration was over 4% in excess, carbon monoxide oxidation was found to be zero order with respet to oxygen concentration and lst order with respect to carbon monoxide concentration and it's activation energy was 10.9Kcal/g mole.

십전대보탕가미로 빈혈이 개선된 노인 환자 1례

김경림,이승은,김경민 대한한방내과학회 2020 大韓韓方內科學會誌 Vol.41 No.3

Objectives: This case reports on the effect of Shipjeondaebo-tang-gami in a patient with anemia. Methods: We used Shipjeondaebo-tang-gami to treat a patient suffering from anemia. We evaluated the improvement of symptoms using biochemical examination of a blood sample and the visual analogue scale (VAS). Results: The patients showed improvement in the clinical symptoms and laboratory results for the biochemical blood tests. Conclusions: This study shows that Korean medical treatment with Shipjeondaebo-tang-gami may be valuable for anemia.

Pyridine의 수첨탈질반응에 있어서 황화수소와 물의 영향

김경림,한창훈 연세대학교 대학원 1989 延世論叢 Vol.25 No.1

The effects of hydrogen sulfide and water on the pyridine hydrodenitrogenation over Niw/γ-Al2O3 were studied at the range of the temperature between 200℃ and 450℃, at the pressure of 1MPa and 3MPa, and at the contact time of 151.52g cat. hr/mol Pyr. The nitrogen removal in hydrodenitrogenation of pyridine was increased, but piperidine concentration of the products was significantly decreased by hydrogen sulfide. Water also increased the nitrogen removal and decreased piperidine concentration, but its effect was smaller than that observed with H2S at the same pressure. In presence of both H2S and water, the nitrogen removal was essentially the same as that-observed in presence of H2S alone. As a result of piperidine hydrogenolysis, the enhancement of nitrogen removal in hy-drodenitrogenation of pyridine is caused by the increase of hydrogenolysis activity. And the enhancing effects of H2S and water on hydrogenolysis activity were reversible.

황화 Ni-Mo/γ-Al₂O₃ 촉매상에서 1-Hexene의 수소화반응에 관한 Thiophene의 영향

김경림,유성현,김문찬,박해경 연세대학교 대학원 1992 延世論叢 Vol.28 No.1

The effect of thiophene on hydrogenation of 1-hexene over sulfided NiMo/γ-Al2O3 catalyst was studied in a fixed bed continuous flow reactor. The ranges of experimental conditions were at the temperatures between 200 and 350℃, the atmospheric pressure, the concentrations of thiophene between 0 and 0.04 mol% and the contact times between 0.04 and 0.1 g cat.h/mL. The hydrogenation increased with increasing temperature but isomerization decreased with increasing temperature. Total conversion and hydrogenation decreased with increasing concentration of thiophene but isomerization increased with increasing concentration of thiophene. The reaction order of 1-hexene was pseudo first with respect to 1-hexene and the activation energy for 1-hexene was found to be 8.8 kJ/mol over sulfided NiMo/γ-Al2O3 catalyst by Arrhenius plot.

CoMo/γ- Al2O3 촉매상에서 Ni - TPP 의 수소첨가탈금속 반응에 관한 연구

김경림,구헌서,최기섭,강상윤 한국화학공학회 1991 NICE Vol.9 No.2