서지주요정보
외부순환형 이중기포탑에서의 액체순환속도 및 산소전달계수 = Liquid circulation velocity and oxygen mass transfer coefficient in external loop airlift reactor
서명 / 저자 외부순환형 이중기포탑에서의 액체순환속도 및 산소전달계수 = Liquid circulation velocity and oxygen mass transfer coefficient in external loop airlift reactor / 한봉희.
저자명 한봉희 ; Han, Bong-Hee
발행사항 [서울 : 한국과학기술원, 1989].
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소장정보

등록번호

4105554

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 8934

SMS전송

도서상태

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반납예정일

초록정보

In other to obtain further information on the behavior of the external loop airlift reactor operating with air-water mixtures, the liquid circulating velocity, gas holdup, oxygen mass transfer coefficient, mixing time and bubble properties were studied. The effects of gas velocity (0.02-0.18 m/s) and the length of horizontal connection pipe (0.1-0.5m) with respect to the previous parameters have been investigated. The local holdup in each section of the airlift reactor was measured by manometric technique and the overall holdup by volume expansion method. The effects of operating variables on the bubble properties were measured by using an electro-resistivity probe. The oxygen mass transfer coefficient between air bubble and water was determined by dynamic absorption method. The mixing time and the liquid circulating velocity were measured by the salt (KCl)-base impulse method. The experimental results in the present investigations can be summarized as follows; 1). The length of the horizontal connection pipe was a key design parameter for the external circulation loop airlift reactor. 2). The overall oxygen transfer coefficient in the external loop airlift reactor with a short connection length was higher than that with a long one due to higher gas holdup. 3). The mixing performance of the external loop airlift reactor with a long connection length was more efficient than that with a short one. 4). Both Chisti et al.'s model and Hatch's model used in predicting the liquid circulating velocity were satisfactory. 5). Some correlations for the estimation of the mixing time, liquid circulating velocity and oxygen transfer coefficient were proposed. ·$V_{Ld} = 1.04 U_G^{0.17} (L_h/L_o)^{0.18}$ ·$t_m = 13.1 U_G^{-0.16} (L_h/L_o)^{-0.04}$ ·$K_La_L = 0.24 U_G^{0.84} (L_h/L_o)^{-0.26}$ ·$K_La_L = 0.45 E_t^{1.14} (L_h/L_o)^{-0.04}$

서지기타정보

서지기타정보
청구기호 {MCE 8934
형태사항 vii, 98 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A-1, Bubble data storage program. - A-2, Flow chart for the analysis of bubble data. - A-3, Experimental data
저자명의 영문표기 : Bong-Hee Han
지도교수의 한글표기 : 이원국
지도교수의 영문표기 : Won-Kook Lee
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 81-86
주제 Reactors.
물질 이동. --과학기술용어시소러스
Mass transfer.
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