서지주요정보
CWM 활용을 위한 저탄화석탄의 수열처리에 대한 연구 = Hydrothermal treatments of low rank coals for CWM applications
서명 / 저자 CWM 활용을 위한 저탄화석탄의 수열처리에 대한 연구 = Hydrothermal treatments of low rank coals for CWM applications / 박광배.
저자명 박광배 ; Park, Kwang-Bae
발행사항 [대전 : 한국과학기술원, 2000].
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소장정보

등록번호

8011134

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 00014

SMS전송

도서상태

이용가능

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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 are not used for CWM because their high inherent moisture contents produce a lower energy density slurry fuel. However, low rank coals still 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 decreasing of pore volume occur. 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 contact angle were measured to know the surface properties of HWD treated low rank coals. The analysis of FT-IR spectra and the value of contact angle of HWD treated low rank coal surface showed that the hydrophilic carboxyl group was dissolved and the inherent moisture was removed. So the hydrophobicity of coals was increased by HWD treatments. The ultimate analysis says that the oxygen consisting of hydrophilic functional group(carboxyl, hydroxyl group) was decreased. Also, the reduction of pore volume and pore area was resistant to moisture reabsorption. As the process temperature was increased, the extent of improvement of surface properties was increased.

서지기타정보

서지기타정보
청구기호 {MCHE 00014
형태사항 vii, 64 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Kwang-Bae Park
지도교수의 한글표기 : 김도현
지도교수의 영문표기 : Do-Hyun Kim
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 62-64
주제 석탄-물 혼합연료
저탄화석탄
건조공정
점도
고유수분
CWM
Low rank coals
Hot water drying
Viscosity
Inherent moisture
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