서지주요정보
내부순환 슬러리 기포탑에서의 휘발성 유기화합물 (TCE/Toluene) 의 광촉매 반응에 의한 동시제거 = Simultaneous removal of volatile organic compounds (TCE/Toluene) by photocatalytic reactions in an internally-circulating slurry bubble column
서명 / 저자 내부순환 슬러리 기포탑에서의 휘발성 유기화합물 (TCE/Toluene) 의 광촉매 반응에 의한 동시제거 = Simultaneous removal of volatile organic compounds (TCE/Toluene) by photocatalytic reactions in an internally-circulating slurry bubble column / 전진희.
저자명 전진희 ; Jeon, Jin-Hee
단체명 생명화학공학과
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012970

소장위치/청구기호

학술문화관(문화관) 보존서고

MCBE 02022

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The photocatalytic degradation characteristics of TCE/toluene by $TiO_2$ powders have been determined in an internally-circulating slurry bubble column (15 cm diameter and 60 cm high) reactor. Gas holdup is not affected by liquid velocity (up to 200 ml/min) and the solid loading (0.1-0.4 wt%). Gas holdup in the slurry bubble column is lower than that in the bubble column since the presence of solid increases the liquid viscosity. Direct photolysis efficiency of TCE without air is higher than that with air flow due to air stripping of TCE. The photocatalytic degradation efficiency of TCE with air is higher than that without air. Therefore, supply of enough oxygen and proper mass transfer are necessary for degradation of TCE during photocatalytic reaction. It has been reported that the optimum loading of $TiO_2$ in the laboratory-scale experiments is 0.1 wt%. In this study, 0.2 wt% of $TiO_2$ was used for efficient illumination with geometrically symmetrical arrangement of the lamps and the increase of light penetration length due to bubble formation. The rate constant (k) and adsorption equilibrium constant (K) are found to be $6.687×10^{-6}$ moles/L-min and $9.2838×10^2L/mol$, respectively. The Langmuir-Hinshelwood model equation fits well with the experimental data. Therefore, the Langmuir-Hinshelwood model can apply to TCE photocatalytic reaction system. The air stripping fraction of TCE increases, but, the photodegradation fraction of TCE decreases with increasing TCE initial concentration in water. It has been found that air stripping is superior to photodegradation of TCE. Toluene at a low concentration (62 ppm) does not affect the photodegradation of TCE, but, at a high concentration (218 ppm) exhibits "toluene quench of TCE effect". Regarding on the TCE photodegradation efficiency, the externally-recirculating system is more efficient than the internally-circulating slurry bubble column photoreactor system. For TCE total removal, the total removal efficiency (photodegradation and air stripping) in the internally-circulating slurry bubble column photoreactor system is higher than the total removal efficiency by photodegradation in the externally-recirculating photoreactor system.

서지기타정보

서지기타정보
청구기호 {MCBE 02022
형태사항 vii, 104 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Jin-Hee Jeon
지도교수의 한글표기 : 김상돈
지도교수의 영문표기 : Sang-Done Kim
학과명칭변경 : 화학공학과가 생명화학공학과로 변경됨(2002년부터)
학위논문 학위논문(석사) - 한국과학기술원 : 생명화학공학과,
서지주기 참고문헌 : p. 96-100
주제 내부순환 슬러리 기포탑
톨루엔
트리클로로 에틸렌
광촉매
internally-circulating slurry bubble column
toluene
TCE
photocatalyst
QR CODE qr code