서지주요정보
석탄-물 혼합연료를 위한 저탄화석탄의 수열처리에 대한 연구 = Hydrothermal treatment of low rank coals for coal-water mixture
서명 / 저자 석탄-물 혼합연료를 위한 저탄화석탄의 수열처리에 대한 연구 = Hydrothermal treatment of low rank coals for coal-water mixture / 조재설.
저자명 조재설 ; Cho, Jae-Seol
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8009440

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 99033

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The majority of today's coal-water mixture(CWM) technology has been developed to prepare a high energy density liquid fuel from bituminous coals. Low rank coals such as subbituminous coal and lignite, mostly because of their high inherent moisture contents, produce a lower energy density slurry fuel and cannot be economically utilized. However, low rank coals have advantages such as low sulfur, low ash and high volatile matter content. The hot water drying process is one method for preparing concentrated coal-water fuel slurries with reduction of a inherent moisture under high temperature and pressure. In this process, the physical and chemical changes such as decarboxylation, carbonization, and tar coating occur. These produce a coal product which is resistant to moisture reabsorption. In this study, the rheological properties of HWD treated low rank coal-water mixture were investigated to observe the effect of HWD process. FT-IR spectrum and ζ-potential were measured to know the surface properties of HWD treated low rank coals. The analysis of FT-IR spectra and the value of ζ-potential of HWD treated low rank coal surface showed that the hydrophilic carboxyl group was dissolved and the anionic concentration of coal surface was increased. Also, as the process temperature was increased, the extent of improvement of surface properties was increased. This yields a product which has a lower viscosity and better stability.

서지기타정보

서지기타정보
청구기호 {MCHE 99033
형태사항 vii, 55 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jae-Seol Cho
지도교수의 한글표기 : 양승만
공동교수의 한글표기 : 김도현
지도교수의 영문표기 : Seung-Man Yang
공동교수의 영문표기 : Do-Hyun Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 53-55
주제 저탄화석탄
건조 공정
석탄-물 혼합물
Low rank coal
Drying process
Coal-water mixture
QR CODE qr code