http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
구정서(J. S. Koo),박성하(S. H. Park),윤영한(Y. H. Youn),김동성(D. S. Kim) 한국철도학회 1999 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, the crashworthy design of the full rake of KHST (Korean High Speed Train under development in G7-project) is numerically evaluated using 2-dimensional crash dynamics. The results of KHST are compared with those of TGV-K (TGV for Seoul-Pusan line). KHST shows better crashworthy behaviors after impact. Specifically, impact forces, decelerations and overriding displacements are much reduced in KHST. All the design guidelines under SNCF accident scenario (collision against a movable rigid mass of 15 ton at 110 ㎞/h) are satisfied in KHST.
Molybdenum sulfide 촉매상에서 중질유의 탈황반응과 탈질반응의 상호작용
정원모,전상문,박성하 大田工業大學 1989 한밭대학교 논문집 Vol.6 No.2
ABSTRACT Interactions between hydrodesulfurization of thiophene and hydrodenitrogena- tion of pyridine in heavy coker oil were studied over sulfided Co-Mo/γ-Al2 O3 and Ni-Mo/γ-Al2 O3 catalysts. The ranges of operating conditions were at the temperatures between 423 and 723K, the pressures between 10 x 105 and 50 x 105 Pa, H2/thiophen, pyridine mole ratio 300 and the contact times between 0.015 and 0.03 gcat.hr/ml feed respectively, Thiophene hydrodesulfurization was inhibited by the presence of pyridine at all temperatures and pressures. Pyridine hydrodenitrogenation was inhibited at low temperatures but enhanced by the thiophene at high temperatures (above 623K) and the formation of piperidine greately decreased with the addition of thiophene at all temperatures and pressures. Co-Mo/γ-Al2 O3 appeared to have greater activity than Ni-Mo/y-Alz 03 appeared to have greater activity than Co-Mo/γ-Al2 O3 for pure pyridine and mixed feed hydrodenitrogenations. Interactions between hydrodesulfurization of thiophene and hydrodenitrogenation of pyridine in heavy coker oil were studied over sulfided Co-Mo/γ-Al_2O_3 and Ni-Mo/γ-Al_2O_3 catalysts. The ranges of operating conditions were at the temperatures between 423 and 723K, the pressures between 10 × 10^5 and 50 × 10^5 Pa, H_2/thiophen, pyridine mole ratio 300 and the contact times between 0.015 and 0.03 gcat.hr/ml feed respectively. Thiophene hydrodesulfurization was inhibited by the presence of pyridine at all temperatures and pressures. Pyridine hydrodenitrogenation was inhibited at low temperatures but enhanced by the thiophene at high temperatures (above 623K) and the formation of piperidine greately decreased with the addition of thiophene at all temperatures and pressures. Co-Mo/γ-Al_2O_3 appeared to have greater activity than Ni-Mo/γ-Al_2O_3 appeared to have greater activity than Co-Mo/γ-Al_2O_3 for pure pyridine and mixed feed hydrodenitrogenations.
활성 탄소섬유에 의한 Cr(Ⅵ)의 흡착특성에 관한 연구
이상섭,김형수,박성하 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.1
The adsorption characteristics of Cr(Ⅳ) on a granular activated carbon (GAC) and three kinds of the activated carbon fibers (ACF) with the different specific surface areas were investigated. It was found that the effective adsorption of Cr(VI) ion was occured in the boundary of weak acidity and most effective at pH level of 5.5. The important parameters which could affect the adsorption of Cr(Ⅳ) ion were found such as specific surface areas and micropore strutures of the ACFs. It was known that the adsorption isotherms could be successfully fitted by the Freundlich equation in the concentration range from 1 to 50ppm.
박성하,전상문,정원모 大田工業大學 1990 한밭대학교 논문집 Vol.7 No.2
The upgrading of Canadian Athabasca bitumen by catalytic hydroprocessing was studied in CSTR(Continous Stirred Tank Reactor) with conventional catalysts of Mo-Co/Al_2O_3 and Ni-Mo/Al_2O_3. The objective of the study was to investigate the effect of resisdence time(or LHSV) and temperature on gaseous and liquid product distribution, conversion of sulfur(HDS) and nitrogen(HDN), hydrogen consumption, pitch conversion and coke formation in the reactor. The optimal speed of agitation, which was used in whole experimental runs, was between 1,000 and 1,300 rpm which minimized mass transfer resistance due to the formation of liquid film on the surface of catalysts. The correlation of resisdence time(t) and concentration(C) was measured to be. C/C_0=1-exp(-(t-0.583/1.45)) In the hydroprocessing of bitumen, the kind of catalysts did not seem to influence the distribution of gaseous products in which which C_3 and C_4 fraction were predominent, whereas C_1 and C_2 fractions in noncatalytic processing. In the liquid products, naphtha fraction was increased with temperature, whereas fuel oil fraction was decreased. The distillate fraction was relatively invariant with respect to temperature. The catalyst Mo-Co/Al_2O_3 showed a higher HDS activity whereas Ni-Mo/Al_2O_3 showed a higher HDN activity. At 430℃ and LHSV=2, the sulfur conversions with Mo-Co/Al_2O_3 and Ni-Mo/Al_2O_3 were about 3 times and 2.5 times, respectively, as much as the conversion in the absence of catalyst and nitrogen conversions were about 4 times and 5 times, respectively.
황화 Ni-W/r-Al₂O₃촉매상에서 수첨탈황반응과 수첨탈질반응의 상호속도론적 해석
정원모,전상문,박성하 大田工業大學 1989 한밭대학교 논문집 Vol.6 No.2
ABSTRACT Interactions between thiophene hydrodesulfurization (HDS) and pyridine hydrodenirogenation (HDN) and the kinetic analysis were studied over sulfided Ni-W/pAlsOa catalyst at the range of temperatures between 423K and 723K, the total pressures between 10 x 105 Pa and 50 x 105 Pa and the contact times between 0.0125 g.cat.hr/ml-feed and 0.03 g.cat.hr/ml-feed. Hydrodesulfurization of thiophene was inhibited by the presence of pyridine at all temperature and pressures, and hydrodemitrogenation of pyridine was also inhibited by the presence of thiophene at all temperatures and pressures but inhibi- tion effect was severer at low temperatures. The rate equations of thiophene and pyridine were given to be Γ HDS = kHDS. Kt-Ct/(1+Kpyr·Cpyr + Kt Ct) and kHDS. = kHDS.. Kpyr. Kpyr/(l+ Kpyr. Cpyr. + Kt-Ct) in terms of Langmuir-Hinshelwood-Hougen-Watson model. At each temperature, reaction rate constants and adsorption /equilibrium con- stants were determined and the activation emergies of thiophehe HDS and pyridine HDN are 13.51 Kcal/mole and 17.79 Kcal/mole, respectively. Interactions between thiophene hydrodesulfurization (HDS) and pyridine hydrodenirogenation (HDN) and the kinetic analysis were studied over sulfided Ni-W/γ-Al_O_3 catalyst at the range of temperatures between 423K and 723K, the total pressures between 10 × 10^5 Pa and 50 × 10^5 Pa and the contact times between 0.0125 g.cat.hr/ml-feed and 0.03 g.cat.hr/ml-feed. Hydrodesulfurization of thiophene was inhibited by the presence of pyridine at all temperature and pressures, and hydrodemitrogenation of pyridine was also inhibited by the presence of thiophene at all temperatures and pressures but inhibition effect was severer at low temperatures. The rate equations of thiophene and pyridine were given to be γHDS = k_HDS. Kt·Ct/(1+Kpyr·Cpyr + Kt Ct) and·c_HDN. = k_HDN, Kpyr. Kpyr/(1+Kpyr. Cpyr + Kt·Ct) in terms of Langmuir-Hinshelwood-Hougen-Watson model. At each temperature, reaction rate constants and adsorption equilibrium constants were determined and the activation emergies of thiophene HDS and pyridine HDN are 13.51 Kcal/mole and 17.79 Kcal/mole, respectively.
김형수,박성하 大田産業大學校 1993 한밭대학교 논문집 Vol.10 No.2
The adsorption characteristics of phenol on granular activated carbon(GAC) and on activated carbon fibers as specific surface area were investigated. It was known that the adsorption isotherms could be successfully fitted by the Freundlied equation in the concentration range from 1 to 500 ppm, and the adsorption capacity of ACFs was larger than that of GAC. It was considered that the ACF would be an adsorbent of TYPE -Ⅰ consisting of narrow micropores and that the mechanism of adsorption would do a micropore filling by observing the adsorption isotherm and SEM photos.