http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
薛秀德 동아대학교 공과대학 부설 한국자원개발연구소 1982 硏究報告 Vol.6 No.2
The understanding of solids mixing pattern on the distributor and the determination of critical gas flow rate to avoid the presence of dead zones are of a matter of vital importance from the viewpoint of design of gas distribution in fluidized beds. This research is an effort to extend experimental investigation to a three dimensional bed which is of particular importance from the viewpoint of design of gas distributors for fluidized bed reactor. Perforated plate distributors and Cap plate distributors have been studied to investigate their operation with regard to formation of dead zone. The experimental variables include particle size, particle density, orifice diameter, orifice pitch, bed height, and gas velocity. Based on the data obtained, empirical correlations for the critical gas flow rate needed to eliminate the dead zone are proposed for the near the center and for the reign near the wall of fluidized bed reactor.
아크릴로니트릴과 스티렌계 광공중합 반응속도에 관한 연구
설수덕,최경선 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.1
The objective of this study is to investigate the kinetics of the photoinitiated(λ=365nm)copolymerization of acrylonitrile with styrene in the presence of Lewis acid and hydrogen donors-in and homogeneous reaction system at 25℃. From these experiment and discussions, we have the results as follows. 1. The reaction of AN-St successfully competes with the quenching of BP triplet by styrene. 2. The monomer reactivity ratio of AN-St was deterimined by Kelen-Tu¨do¨s method, reactivity ratios of n(AN), r₂(St), as 0.09, 0.59 respectively and their model is as follows. R_p=0.023[M]^0.48[I]^0.47[S]^0.62[H]^0.32exp^-1.38/RT
α-셀룰로오즈의 열분해에 관한 연구(Ⅰ) : 산촉매 NaCl의 영향
설수덕,나상도 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.-
The Thermal decomposition of the α-Cellulose and NaCl was a thermal analysis technique in the steam of nitrogen gas with 30ml/min at various heating eates from 4 to 20℃/min. The Derivative and Integral method were used to obtained values of activation energy of decomposition reaction. 1. The values of activation energy evaluated by Derivative and Integral method were consistent with each other very well. 2. The maximum value of heat of decomposition evaluated by DSC method was α-Cellulose/NaCl=90/10. 3. The thermogravimetric trace curve agreed with the theoretical equation.
광증감제에 의한 Acrylonitrile 의 광중합 속도 (1)
설수덕 (Soo Duk Seul) 한국고무학회 1999 엘라스토머 및 콤포지트 Vol.34 No.1
N/A Kinetics of solution photopolymerization of acrylonitrile(AN) with sensitizer, such as NaSCN, KSCN, Ba(SCN)₂, NH₄SCN, ZnCl₂ and Na₂SeO₃, were studied using UV crosslinker at various monomer concentrations(1.8∼7.58㏖/ℓ), sensitizer concentrations(10∼60%), reaction temperature(10∼70 ℃), energy intensities(1000∼9900μJ/㎠) at isothermal condition under nitrogen atmosphere. Under the irradiation of high pressure mercury lamp(λ=365㎚) High conversion and uniform molecular weight were obtained compare to thermal polymerization at reaction temperature of 50℃ reaction time of 3hr and 50% NaSCN without any initiator. Their kinetic model was as follows : R_P=0.0142[M]^(0.82)[I]^(0.49)[S]^(0.52) exp(-1.33/RT).
회분식반응기에서 무수말레인산과 알킬메타크릴레이트의 공중합(Ⅱ)
설수덕,황준호 東亞大學校 1998 東亞論叢 Vol.35 No.-
Radical conolymerization of maleic anhydride with methylmethacrylate, ethyl methucrylate, n-buty1 methacrylate was carried out in a batch reartor. Solvent and initiator used were n,n-dimethylformamide and AIBN, respectively. Reactor volume was 300 litters, polymerization time 10 hours and polymerization temperature 50∼90℃. The copolymerization conversions were analyzed by FT-IR, GC-MS, GPC, and confirmed by measuring the solid weights of copplymers obtained after evaporating solvent. The monomer reactivity ratios were determined by the Kelen-Tudos method The maximun copolymerization activation energies calculated using differential method was 4.07 koal/mol for MAh/MMA=0.1/0.9.