http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이철위,임지선,전영표,김종구 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
산업기술혁신사업 석유계 피치 및 침상/등방 코크스 제조기술 개발의 1차년도 개발현황에 대해 점검하고자 한다. 본 사업은 석유계 저급유로부터 고부가가치 탄소재 제조기술을 개발하여 기술 국산화 및 탄소기술 확보에 중점을 두고 있다. 특히 석유계 저급유의 분석 및 정제 기술, 등방 및 바인더 피치의 기술개발 현황, 탄소재료 분석기술, 아울러 석유계 저급유로부터 피치 제조를 위한 기술장비 설계/제작 등의 주요 목표를 수립하였으며, 본 심포지엄에서는 1차년도 연구목표 중간 달성도를 점검 및 검토하고 향후 연구방향에 대해 논의하고자 한다.
이철위 한국자기공명학회 2002 Journal of the Korean Magnetic Resonance Society Vol.6 No.2
The chalcogenide glass (ALS, Al2S3-La2S3) was prepared by melting a stoichiometric mixture of aluminum powder and La2S3 under H2S atmosphere at 1200oC. Glasses containing 0.1 – 1.0 mol % of Mn2+, Gd3+ and Cu2+ were also prepared. The characteristic features of the ESR spectra for the transition metal containing ALS glasses are interpreted. 영어논문
이철위,정한철,심일운,최규용,이재광,박중남 한국화학공학회 2005 Korean Journal of Chemical Engineering Vol.22 No.5
The catalytic performance of transition metal (Fe or Cu2+) containing nano-sized hollow core mesoporous shell carbon (HCMSC) heterogeneous catalysts for the hydroxylation of phenol with hydrogen peroxide (H2O2) in water was investigated in a batch reactor. The metal-containing HCMSC catalyst showed higher activity than the same metal ion-exchanged zeolites. The nature of the metal and its content in the HCMSC had remarkable influence on the reaction results under the typical reaction conditions (PhOH/H2O2=3, reaction temperature=60 oC). Fe2+ containing HCMSC catalyst showed high catalytic activity with phenol conversion of 29%, selectivity to catechol (CAT) and hydroquinone (HQ) about 85%, H2O2 effective conversion about 70% and selectivity to benzoquinone (BQ) below 1% in the batch system.
이철위,Nansuk You,Songhun Yoon,Wonkyu Lee,Heung Yeoun Lee,Sang-Yeop Park,Jae Heon Shim,Jong Soo Kim 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.6
Based on a theoretical background [1,2], a lab scale cylindrical SAGD (steam assisted gravity drainage)model was designed, constructed and operated. There are six different parts in the apparatus: (1) water supplier, (2)steam generator, (3) SAGD cylindrical model, (4) cooling system, (5) constant pressure maintaining system and (6)production system. Temperature, pressure and steam injection rate were controlled by computer, and product (mixture of oil and water) was collected/separated manually. Extra heavy oil (<10 cp at 200 oC) and glass bead (diameter 1.5mm) were mixed homogeneously for making porosity of 0.3 and applied for simulating oil sand. For obtaining optimum operation conditions of SAGD apparatus, several attempts were made. When the steam at high temperature (160-180 oC),high pressure (8-9 atm) was injected with 20-25 cc/min, cSOR (cumulative steam to oil ratio) of about 5 was obtained with oil recovery of 78.8%.
우라늄 화합물의 합성과 성질에 관한 연구 (제1보). 비스(운데카텅스토포스파토)우라늄(IV) 산 이온, $[U(PW_{11}O_{39})_2]^{10-}$의 염
이철위,소현수,Chul Wee Lee,Hyunsoo So 대한화학회 1982 대한화학회지 Vol.26 No.3
A guanidinium salt of $[U(PW_{11}O_{39})_2]^{10-}$, the solubility of which is adequate for crystal growing, has been synthesized. Using this salt or potassium salt, we have measured the stability of $[U(PW_{11}O_{39})_2]^{10-}$as a function of pH of the solution and found that the anion is stable for the pH range 3~7. We have developed a colorimetric method for determining the concentration of $U^{4+}$. In this method$PW_{11}O_{39}^{7-}$ is added to$U^{4+}$ in such a quantity that the mole ratio $PW_{11}O_{39}^{7-}/ U^{4+}$exceeds 2 and the intensity of the 22.7kK band (${\varepsilon}$1030 M-1cm-1) is measured. In order to develop a continuous method to recover uranium, we have determined the amount of recoverd$PW_{11}O_{39}^{7-}$ after decomposing $[U(PW_{11}O_{39})_2]^{10}$- by adding either a base or an oxidizing agent. The percentage of $PW_{11}O_{39}^{7-}$recovered was approximately 70% when a base was used and approximately 80% when$K_2S_2O_8$ was used. A colorimetric method for determining $PW_{11}O_{39}^{7-}$ has also been developed. 단결정을 키우기에 적절한 용해도를 가진 $[U(PW_{11}O_{39})_2]^{10-}$의 구아니딘윰염을 합성하였다. 이 염 혹은 칼륨염을 사용하여 $[U(PW_{11}O_{39})_2]^{10-}$의 안정도를 용액의 pH의 함수로 조사하였으며, pH 3~7에서 안정함을 발견하였다. 이 영역에서 $PW_{11}O_{39}^{7-}$대 $U^{4+}$의 몰비가 2이상 되게 $PW_{11}O_{39}^{7-}$를 가하고 22.7kK band (${\varepsilon}$ 1030 M-1cm-1)띠의 세기를 측정함으로써 $U^{4+}$를 비색정량하는 방법을 개발하였다.$PW_{11}O_{39}^{7-}$ 를 사용하여 우라늄을 회수하는 방법을 개발하기 위해,$[U(PW_{11}O_{39})_2]^{10}$- 를 두 다른 방법으로 분해시켜 분리된$PW_{11}O_{39}^{7-}$ 를 정량하였다. $PW_{11}O_{39}^{7-}$의 회수율은 염기를 가해 분해시켰을 때 약 70%, $K_2S_2O_8$로 산화시켜 분해시켰을 때 약 80%이었다. 본 연구를 위해 $VOSO_4$를 이용한$PW_{11}O_{39}^{7-}$ 의 비색정량법도 개발하였다.