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        검색결과 3

        2.
        2009.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Kinetic studies on the ligand substitution reactions of cyanocomplexes were performed in several micellar solutions. It showed the observed rate constants was found to be independent of the entering ligand concentration at high concentration of cyanopyridine and pyrazinecarboxylate. We could see also that in nonionic and anionic micellar solutions no influence of changes in the surfactant concentration on the observed rate constants was found. Taking into account the hydrophilic nature of the cobalt complex, the cobalt complex molecule was expected to be located in the aqueous phase of the micellar systems, where the reaction would take place. In cationic micellar solutions, a small increase in the observed rate constant was found when the cationic surfactant concentration increased. After reaching a maximum, the rate constant decreased on increasing surfactant concentration and subsequently it reached a plateau, where the observed rate constant was independent of changes in the surfactant concentration.
        4,000원
        3.
        2015.09 KCI 등재 서비스 종료(열람 제한)
        Carbonization using chicken manure was used to obtain an energy source. In order to estimate the reaction rate at theoptimal conditions for chicken manure in carbonization process it is estimated the reaction kinetics for the process. Thecarbonization process for chicken manure was optimized at carbonization temperature 300oC to 400oC in 20minutes. Fromthe examination of conversion characteristics of chicken manure, carbonization reaction can be described by the 1st orderkinetic reaction. Frequency factor(A) of reaction rate for chicken manure was evaluated to be 0.55×10−2min−1 and theactivation energy was estimated to be 3,815.0kcal/kmol. As increased carbonization temperature from 250oC to 400oC,reaction rate constant of chicken in the 1st order kinetic reaction is also increased from 0.0604min−1 to 0.1383min−1.In this study, carbonization degree of chicken manure in carbonization process was estimated by kinetic reaction deduction.The result of kinetic reaction in carbonization of chicken manure was evaluated to be 1st order kinetic reaction.