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PSA 공정에서 압력비 , 원료기체 및 세정기체 속도의 영향
서성섭,신치범 ( Sung Sup Suh,Chee Burm Shin ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.3
Pressure swing adsorption process for oxygen production from air was studied by numerical simulation to estimate product purity, recovery, and productivity. At a fixed feed rate, maximum purity exists. In case of large feed velocity and pressure ratio, purity increases, then decreases as purge-to-feed ratio increases. Feasible region could be found in a figure showing recovery versus purity with fixed pressure ratio. From this figure, maximum recovery could be obtained for a given purity. Maximum productivity for a given purity was obtained at different operating conditions. As pressure ratio increases above 5, recovery hardly changes and productivity increases considerably.
서성섭,노제승,주재백,남석우,임태훈,오인환,홍성안 ( Sung Sup Suh,Je Seung Roh,Jeh Beck Ju,Suk Woo Nam,Tae Hoon Lim,In Hwan Oh,Seong Ahn Hong ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.5
Effectiveness factor which was defined as the ratio of the current produced by the electrode under diffusional resistance to that produced by the electrode without diffusional resistance was investigated for porous gas diffusion electrode described by agglomerate model. System variables including reaction rate, diffusion coefficient, and agglomerate size were combined into three dimensionless parameters, and their effects on effectiveness factor were studied. Effectiveness factor reaches a maximum value with a critical electrode thickness.
제올라이트 13X에 의한 배가스 성분의 흡착 특성 및 불순물의 영향
서성섭 ( Sung-sup Suh ),이호진 ( Ho-jin Lee ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.6
Most of combustion processess used in industries require recovering or removing flue gas components. Recently a new MBA (moving bed adsorption) process for recovering CO<sub>2</sub> using zeolite 13X was developed. In this study, adsorption experiments for carbon dioxide, nitrogen, sulfur dioxide, and water vapor on zeolite 13X were carried out. Adsorption equilibrium and adsorption rate into solid particle were investigated. Langmuir, Toth, and Freundlich isotherm parameters were calculated from the experiment data at various temperatures. Experimental results were con-sistent with the theoretically predicted values. Also CO<sub>2</sub> adsorption amount was measured under the conditions with impurities such as SO<sub>2</sub> and H<sub>2</sub>O. Binary adsorption data were well fitted to the extended Langmuir isotherm using parameters obtained from pure component experiment. However, H<sub>2</sub>O impurity less than, roughly, ~10<sup>-5</sup> H<sub>2</sub>O mol/g zeo-lite 13X enhanced slightly CO<sub>2</sub> adsorption. Spherical particle diffusion model well described experimentally measured adsorption rate. Diffusion coefficients and activation energies of CO<sub>2</sub>, SO<sub>2</sub>, N<sub>2</sub>, H<sub>2</sub>O were obtained. Diffusion coeffi-cients of CO<sub>2</sub> and SO<sub>2</sub> decreased with small amount of preadsorbed impurity. Parameter values from this study will be helpful to design of real commercial adsorption process.