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박판욱,한성범 한국화학공학회 1985 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.23 No.6
SO₂단일기포의 순수한 물에 대한 흡수를 25℃의 정체한 흡수관내에서 행하였다. 순수한 물중을 부력에 의해 상승하는 SO₂단일기포는 용해됨에 따라서 기포의 형상이 구형에서 편구형으로 연속적인 상호변환을 일으켰으며 이에 따른 기포의 편심율은 대체로 1 부근 값에서 진동하였다. 기포의 표면적과 순간상승속도는 기포의 편심율 변환주기에 따라 진동하는 값을 보이고, 특히 기포의 액상물질전달 계수는 편심율의 진동주기에 따라 진동증가하는 값을 가졌다. SO₂단일기포와 순수한 물간의 흡수에서 계면의 가수분해반응에 의하여 생성된 수소 ion의 물질전달 촉진효과가 거의 무시되어 SO₂의 액상물질 전달속도는 film model로 해석되었으며, 실제 흡수속도와 10% 이내로 접근한 결과를 보였다. The absorption rate of SO₂ gas bubble into pure water had been measured at 25℃, by a single rising bubble of SO₂ through a quiescent pure water column. During dissolution, the bubble shape was deformed alternately from spherical to oblate or prolate form with the bubble ascending and the eccentricity of a bubble had vibrated around unit value by the deformation period. The rising velocity and the surface area of a bubble was also vibrating with the performance of shape deformation. The liquid phase mass transfer coefficient had been affected mainly by the bubble deformation and the value showed the increasing tendency with the oscillating cycle. The absorption rate of the instantaneous reversible hydrolysis of dissolved SO₂ was modeled and agreed within 10% deviation by the theory of film model. For the hydrolysis rate of dissolved SO₂ was enhanced a little by the producing hydrogen ion.
박판욱,윤영삼,권오상,조태제,정용옥 ( Pan Wook Park,Young Sam Yun,Oh Sang Kweon,Tae Je Cho,Jeung ( Park ) Yong Ok ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.1
Experimental studies and perdictive models for adsorption rate and fixed-bed adsorption column were used to investigate the performance of activated carbon in the removal of chloro-organic compounds in aqueous solution. Model equations in batch-reactor and fixed-bed column were solved by the technique of finite element method. Three species, chloroform(CF), monochloroacetaldehyde(MCA) and dichloroacetaldehyde(DCA), were the single solutes studied and activated carbon(Filtsorb: F-400) was used as a adsorbent. Experimental studies for adsorption isotherm, adorption rate and for concentration history profiles of effluent from the column were compared with the results obtained from predictive models formulated by finite element method. Since the numerical simulations of the model were in good agreement with experimental data, the parameters estimated by the best fitting could make the models regenerate accurate adsorption rate and breakthrough curves.