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NTIS 바로가기Korean chemical engineering research = 화학공학, v.50 no.5, 2012년, pp.850 - 859
김광수 (과학기술연합대학원대학교(UST)) , (찰머스 공과 대학교) , 이정우 (과학기술연합대학원대학교(UST)) , 이은도 (과학기술연합대학원대학교(UST)) , 최영태 (한국생산기술연구원)
Devolatilization is an important mechanism in the gasification and pyrolysis of woody biomass, and has to be accordingly considered in designing a gasifier. In order to describe the devolatilization process of wood particle, there have been proposed a number of empirical correlations based on experi...
핵심어 | 질문 | 논문에서 추출한 답변 |
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바이오매스는 무엇으로 각광받고 있는가? | 최근 지구온난화 및 유가급등으로 인한 대체 에너지 자원의 필요에 따라 목질계 바이오매스에 대한 관심이 증폭되고 있다. 특히 바이오매스와 같은 고체 연료의 가스화 공정은 다른 열화학적 공정들에 비해 비교적 오염물질 배출이 적을 뿐만 아니라 에너지 활용 면에 있어서도 차세대 청정 이용기술로 각광받고 있다. 하지만 바이오매스의 다양한 특성으로 인하여 상용화된 가스화 공정은 극소수에 불과 하다. | |
탈휘발 모델에 사용된 가정은 무엇인가? | 1. 바이오매스 입자의 형태는 구형이며, 열전달은 등방성이다. 2. 입자 내부의 열전달은 열전도(heat conduction)에 의해서만 진행된다. 3. 입자에 포함된 수분은 자유수(free water)로 취급한다. 4. 생성된 기체상 물질은 고체상 물질과 열적 평형(thermal equilibrium)이다. 5. 생성된 탈휘발 가스와 수증기는 생성되는 즉시 배출된다(internal convection 무시). 6. 수증기의 재응축(re-condensation)이나 타르의 분해(secondary pyrolysis reaction)는 발생하지 않는다. 7. 탈휘발 완료 시간(tdev)은 건조기준 전환율(Xw)이 99% 일 때이다. 8. 유동화 매체는 질소이다. | |
목질계 바이오매스에 대한 관심이 증폭되고 있는 이유는? | 최근 지구온난화 및 유가급등으로 인한 대체 에너지 자원의 필요에 따라 목질계 바이오매스에 대한 관심이 증폭되고 있다. 특히 바이오매스와 같은 고체 연료의 가스화 공정은 다른 열화학적 공정들에 비해 비교적 오염물질 배출이 적을 뿐만 아니라 에너지 활용 면에 있어서도 차세대 청정 이용기술로 각광받고 있다. |
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