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배효광,박재효,이승엽,이철희 嶺南大學校 工業技術硏究所 1987 연구보고 Vol.15 No.2
A flow system was used to measure the equilibrium solubilities of Benzoic acid(308, 318, 328 K), Phenol(303, 309 K) and Menthol(303, 313, 323 K) in supercritical Carbon dioxide at various temperatures and a ranged of pressures. The observed data were correlated with a thermodynamic model based on the Peng and Robinson equation of state. The critical properties and acentric factor for Menthol that could not be available in literature were predicted by the method proposed in this work as well as Lydersen's method.
배효광,정해익 嶺南大學校 工業技術硏究所 1990 연구보고 Vol.18 No.1
The vapor-liquid equilibria at high pressure are predicted by using Peng-Robinson's equation of state. The interaction and size parameters included in the equation of state are obtained by optimization based on the principle of maximum likelihood. The optimal size parameter ηij is nearly equal to unity for 100 binary systems composed of carbon dioxide-hydrocarbon, methane-hydrocarbon and hydrocarbon-hydrocarbon, which are extremely unsymmetric systems. This fact means that it is not necessary to introduce the size parameter(ηij) into the equation of state. The interaction parameter ηij depends irregularly on temperature for all the binary systems and it is more sensible to the error of experimental variables than the temperature of system. More accurate observed date are, therefore, needed to investigate the temperature dependence on the interaction parameter.
Naphtha의 熱分解에 依한 Olefin의 生成에 關하여
裵孝廣 慶北工業專門大學 1968 論文集 Vol.5 No.-
Thermal cracking of n-Hexane, the major component of naphtha was carried out the similar temperature range of commercial naphtha cracking unit operation, in order to search the date for reactor design. In this work, the lighter fraction of naphtha and the n-Hexane was decomposed thermally at the reaction temperature range 650∼800℃ and catalytically at 600∼700℃ for the comparision. The gaseous product was analyzed by gas chromatography. The combination of the mole fractions of gaseous product and equilibrium constants(Kn) of several subsystems in all the decomposition reaction was plotted against the pyrolysis severity function (tθ0.06). Then, distribution of the major gas components could be roughly predicted by the severity function. The actual weight percent of ethylene was 15∼25% in the range of pyrolysis severity function 1300∼1500 and was compared with the estimated value from the emperical equation proposed by H.R. Linden and J.M. Reid⑴. It is possible considered that n-Hexane can be used as the representaive component to obtain the reactor design data of naphtha cracking unit experimentally, for the difference of gas distribution between naphtha and n-Hexane cracking was not clearly found.
裵孝廣 慶北工業專門大學 1969 論文集 Vol.6 No.-
This study was carried out for the basic data, which are necessary to design the plant getting rid of the corrosive CO2 in water. As the filter materials, Calcite, Dolomite and Magnesia clinker priduced in our country, was used. At various temperatures and flow rates of the water contained corrosive CO2, was the reaction investigated. As the results, the dver-all rections for the three cases were expressed as the first order, and over-all rate constant, K was obtained by plotting V/v vs. log(1-x).(See Table4).
裵鐵世,金秉圭,姜渭斗,金孝全 東亞大學校 大學院 1977 大學院論文集 Vol.1 No.-
Under the current legal system, Legal Aid is of the official counsel and the cost exemption in the Criminal Procedure Law and of the litigation assistance in the Civil Procedure Law. But in practice, official counsels are often appointed pending in the court and argue the case for the defendants like that "we want to deal with the accused to leniently." And also the cost exemption and litigation assistance are not put to practical use today. The legal aid system is necessary in not only a Criminal but also a Civil Procedures. It must be properly recognized in both ones. The meanings of those terms are not clearly applied because the history of the system is short. However the supports in the legal procedure like the counsellor designation and cost exemption are called as the Legal Assistance. This support outside the procedure, that is, the legal counsultance and legal guidance, is called as the Legal Advice. It is proper to regard the Legal Assistance and Advice as the Legal Aid. Having the Legal Aid been an institution aimed at to protect safeguard the socio-economically poor, it is understood and specified as a Sozialrecht in the western countries. We think our system must introduce the Legal Aid which are comprised in the people's right of life (Recht auf Existenz). Public defender in the America is an example. Since the Legal Aid is for the poor or misfortunate, it is based on the neighborhood spirit. Therefore the Legal Aid can be developed as jurist body's or each law school's new town movement. The practice of this Legal Aid shall be preceded by the education of lawers, and it must be attended with an improvement of the existing legal education.
이승엽,박원규,배효광 嶺南大學校 工業技術硏究所 1985 연구보고 Vol.13 No.2
Supercritical fluid extraction can generally be accomplished at conditions near the critical point of fluid. Most phase equilibrium studies related to supercritical fluid extraction have been restricted to single-solvent system. However, under certain conditionsm, it may be advantageous to use a mixed fluid. Therefore, this work is to offer the necessary basic data, ie., the method to calculate the critical properties of mixtures. For the prediction, it is necessary to use the equation of state which can represent the state of substance at high pressure. In present work, it uses the equation proposed by Peng-Robinson to calculate the critical properties of mixtures. It is shown that the experimental values to be available in literature may be well corresponded to the calculated values by thermodynamic relationships and the equation of state mentioned above. Then, we obtained also the optimum value of interaction parameter included in the equation for a mixed fluid system.
Group Contribution법에 의한 고압기-액평형
구본식,배효광 嶺南大學校 工業技術硏究所 1986 연구보고 Vol.14 No.2
The mixing rule derived from excess Gibbs free energy at infinite pressure is newly introduced in the SRK equation of state. The Gibbs free energy is predicted by the method of analytical solution of groups(ASOG). The group pair parameters for CH₂, CH₃, CH₄and CO₂groups are well correlated to the temperature. The vapar-liquid equilibria predicted from using the parameters for the binary systems of n-paraffins and carbon dioxide are compared with the results using the optimum interaction parameter(??). The average deviations of vapor mole fraction and pressure in this work are comparative to them by the optimum ??.