서지주요정보
내부순환유동층반응기에서의 석탄가스화 반응 특성 = Coal gasification characteristics in an internally circulating fluidized bed reactor
서명 / 저자 내부순환유동층반응기에서의 석탄가스화 반응 특성 = Coal gasification characteristics in an internally circulating fluidized bed reactor / 김용전.
저자명 김용전 ; Kim, Yong-Jeon
발행사항 [대전 : 한국과학기술원, 1996].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8006560

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 96005

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Australian coal was gasified in an internally circulating fluidized bed (0.3 m-I.D. × 2.7 m-high) with a draft tube (0.1 m-I.D. × 0.9 m-high). The effects of reaction temperature (780 - 900℃), oxygen/coal ratio (0.30 - 0.53), coal feed rate (5.3 - 12.1 kg/hr), air flow rate (7 - 15 $U_{mf}$), and steam/coal ratio (3.5 - 5.0) on product gas compositions, carbon conversion, cold gas efficiency, gas yield, and calorific value of the product gas have been determined in an internally circulating fluidized bed. In the fluidized bed, Coal combustion (draft tube) and gasification (annulus) zones can be divided by inserting a centrally located draft tube. By using a separator over the draft tube, high calorific value gas can be obtained in the gasification section (annulus). The contents of hydrogen, carbon monoxide, gas yield, carbon conversion, and cold gas efficiency increases with reaction temperature. Calorific value of the product gas, gas yield and cold gas efficiency decrease, but carbon conversion increases with increasing oxygen/coal ratio. With increasing coal feed rate, calorific value of the product gas increase whereas, gas yield, cold gas efficiency and carbon conversion decrease. On the other hand, steam/coal ratio does not produce any significant effect on the gasifier performance. With increasing gas velocity, calorific value of the product gas and gas yield increase, but carbon conversion and cold gas efficiency decrease. In the gasification zone (annulus), the product gas compositions (dry base) are found to be 31.8~46.2%-$H_2$, 18.8~25.6%-CO, 13.2~20.4%-$CO_2$, 5.3~10.4 %-$CH_4$ with calorific value of 8.6~13.2 MJ/㎥ which is higher those from conventional fluidized bed or spout bed gasifier and other types of internally circulating fluidized bed gasifiers. The obtained gas compositions, gas yield, calorific value, carbon conversion, and cold gas efficiency have been correlated with the pertinent dimensionless operating variables as: ${Y=K(m_s/m_c)^a (m_O_2/m_c)^b (T')^c (y_O_2)^d}$ with the known operating variables of $(m_s/m_c)$, $(m_O_2/m_c),$ (T'), and $(y_O_2)$, gas composition, calorific value of the product gas, gas yield, carbon conversion, and cold gas efficiency can be successfully determined in the present coal gasifier.

서지기타정보

서지기타정보
청구기호 {MCHE 96005
형태사항 viii, 87 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : 1, Internally cireulating fluidized bed gasifier
저자명의 영문표기 : Yong-Jeon Kim
지도교수의 한글표기 : 김상돈
지도교수의 영문표기 : Sang-Done Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 74-77
주제 석탄가스화
내부순환유동층
중열량 가스
Coal gasification
Internally circulating fluidized bed
Medium calorific value gas
QR CODE qr code