서지주요정보
삼상 유동층의 축 방향 분산 특성 = Axial dispersion characteristics in three-phase fluidized beds
서명 / 저자 삼상 유동층의 축 방향 분산 특성 = Axial dispersion characteristics in three-phase fluidized beds / 김화성.
저자명 김화성 ; Kim, Hwa-Sung
발행사항 [대전 : 한국과학기술원, 1990].
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등록번호

8000881

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 9003

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초록정보

Axial dispersion characteristics in two-(gas-liquid, liquid-solid) and three-(gas-liquid-solid) phase fluidized beds have been studied in 0.254 and 0.376 m I.D. Plexiglas columns. The axial dispersion coefficients have been measured using a pulse response technique and analyzed by means of the axially-dispersed plug flow model. Tap water, Carboxyl methyl cellulose (CMC), TritonX-100 and ethanol aqueous solutions were used as the liquid phase; air as the gas phase and glass beads of 1.0, 2.3, 3.0, and 6.0 mm in diameter as the solid phase. The effects of liquid velocity (0.02~0.2 m/s), gas velocity (0.0~0.12 m/s), liquid viscosity (1~72.5 $mPa\cdot s^n$), surface tension (30~72.8 mN/m), particle size (1~6 mm) and column diameter (0.254, 0.376 m) on the axial dispersion coefficient of liquid phase have been determined. The liquid axial dispersion coefficient ($D_z$) increases with increasing gas and liquid velocities and liquid phase surface tension in two (gas-liquid) and three phase fluidized beds. Whereas, the effect of liquid viscosity on $D_z$ is found to be small. The axial dispersion coefficient shows a maximum value with an increase in particle size and it sharply increases with increasing column size in three phase fluidized beds. The axial dispersion coefficients in terms of the Peclet number have been well represented by a correlation equation based on the concept of isotopic turbulence theory involving the ratio of fluid velocities and the ratio of particle to column diameter. $Pe,_z = \frac{d_pU_1}{D_z} = 1.82 \Bigg( \frac{d_p}{D_c} \Bigg)^{1.15}\Bigg( \frac{U_1}{U_1+U_g} \Bigg)^{0.935}$

서지기타정보

서지기타정보
청구기호 {MCE 9003
형태사항 viii, 127 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Hwa-Sung Kim
지도교수의 한글표기 : 김상돈
지도교수의 영문표기 : Sang-Done Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 110-117
주제 Dispersion.
유동화. --과학기술용어시소러스
분산. --과학기술용어시소러스
Fluidization.
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