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NTIS 바로가기청정기술 = Clean technology, v.18 no.2 = no.57, 2012년, pp.123 - 143
Supercritical fluid technology (SFT) is recently one of the most new techniques, which has been interested various fields of related chemical industries. SFT is the most effective and practical technology with eco-friendly, energy-savings, and high efficiency as the technique using the advantages of...
핵심어 | 질문 | 논문에서 추출한 답변 |
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초임계유체란? | 초임계유체(Supercritical fluid; SCF)란 임계압력 및 입계온도 이상의 조건을 갖는 상태에 있는 물질로 정의되며, 일반적인 액체나 기체와는 다른 고유의 특성을 가진다. 초임계 상태의 물리적인 특성은 기체와 액체의 중간정도의 물성을 가지며, 상변화 없이도 약간의 압력, 온도 변화에 따라 물성을 변화시킬수 있으며, 표면장력이 없기 때문에 세공구조에도 쉽게 침투하고 확산력이 좋으며 물질전달 속도가 크다는 장점이 있다. | |
초임계유체기술 크게 어떻게 분류되는가? | 초임계유체기술은 크게 분리기술(separation technology), 반응기술(reaction technology), 재료기술(materials technology)의 3가지로 분류되며 뿌리 부분에 공통핵심기술이 자리 잡고 있다 (Figure 2). 분리․정제기술은 추출(extraction), 세정(cleaning), 분획(fractionation), 건조(drying) 등이 포함되며, 반응기술에는 초임계유체가 반응용매 또는 반응물로서 사용된다. | |
초임계유체기술 중 분리, 정제기술에는 무엇이 포함되는가? | 초임계유체기술은 크게 분리기술(separation technology), 반응기술(reaction technology), 재료기술(materials technology)의 3가지로 분류되며 뿌리 부분에 공통핵심기술이 자리 잡고 있다 (Figure 2). 분리․정제기술은 추출(extraction), 세정(cleaning), 분획(fractionation), 건조(drying) 등이 포함되며, 반응기술에는 초임계유체가 반응용매 또는 반응물로서 사용된다. 초임계수산화반응(supercritical water oxidation)에서는 물을 초임계상태로 하여 반응용매로서 사용하지만 초임계 가수반응(supercritical hydration) 또는 수화반응(supercritical hydrolysis)에서는 반응용매와 더불어 반응물로서 작용한다. |
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