탄소나노튜브와 활성탄에서 산소, 질소 및 아르곤의 흡착평형

다국어 초록 (Multilingual Abstract)

Pressure swing adsorption(PSA) is a well established process for separation or purification of gas mixtures in the chemical industries. Nowdays, the importance of this process increases because it has been widely used as an alternative for cryogenic processes for the on-site generation of nitrogen, oxygen and hydrogen. As further process improvements are made, PSA will more favorably at higher production rates.
Zeolites, which preferentially adsorb nitrogen, are used for the production of oxygen from air, while for the production of nitrogen, carbon molecular sieves(CMS) are the preferred adsorbents.
In this work, it was investigated adsorption equilibria of pure oxygen, nitrogen and argon in carbonaceous materials such as an activated carbon(AC), single-walled nanotubes(SWNTs) and multi-walled nanotubes(MWNTs).
The microporous structure of AC was a slit-shaped pore while SWNTs and MWNTs were cylindrical structure. This different pore structure and pore size distribution may be led to difference in isotherm equilibrium of oxygen, nitrogen and argon. The adsorption capacity of oxygen and nitrogen was in the order AC> SWNTs> MWNTs, while the selectivity was SWNTs> MWNTs> AC.

목차 (Table of Contents)

• Contents
• Abstract = ⅳ
• Ⅰ. 서론 = 1
• Ⅱ. 이론 = 3
• 1. 흡착 = 3
• 1) 물리흡착과 화학흡착 = 5
• 2. 흡착등온식 = 8
• 1) Langmuir Isotherm = 10
• 2) Freundlich Isotherm = 12
• 3) Langmuir-Frendlich Isotherm = 12
• 4) Toth Isotherm = 13
• 5) Redlich and Peterson Isotherm = 13
• 6) Temkin Isotherm = 14
• 3. 흡착분리공정 = 15
• 1) 흡착제 재생방법에 따른 분류 = 15
• 2) 분리기구에 따른 분류 = 16
• 3) 공급류 조성에 따른 분류 = 17
• 4. 흡착량의 측정 = 17
• 5. 흡착현상의 응용 = 18
• 6. 흡착제 = 18
• 6.1. 활성탄 = 18
• (1) 활성탄의 구조 = 19
• (2) 활성탄의 세공구조 = 19
• (3) 활성탄의 종류 = 22
• (4) 활성탄의 이용기술 = 24
• 6.2. 탄소나노튜브 = 25
• 1) 탄소나노튜브의 합성 = 26
• (1) 아크방전법 = 26
• (2) 레이저 증착법 = 27
• (3) 화학 기상 증착법 = 27
• (4) 열 화학 기상 증착법 = 27
• (5) 기상합성법 = 28
• 2) 탄소나노튜브의 응용 = 28
• (1) 수소저장 = 28
• (2) 초고용량 캐패시터 = 29
• (3) 트랜지스터 소자응용 = 29
• Ⅲ. 실험 = 32
• 1. 실험장치 및 실험방법 = 32
• 1) 흡착제 = 34
• 2) 부피측정 = 34
• 3) 흡착가스 = 34
• 2. 탄소나노튜브 정제 = 36
• 3. 흡착제의 재생 = 36
• 4. 산소, 질소, 아르곤 흡착실험 = 37
• Ⅳ. 결과 및 고찰 = 38
• 1. 흡착제에 따른 흡착등온선 = 38
• 1) 탄소나노튜브와 활성탄 비교 = 38
• 2) 흡착등온선 비교 = 42
• 3) Curve fitting = 46
• 2. 흡착에 영향을 미치는 인자 = 58
• 1) 촉매금속의 영향 = 58
• 2) 탄소나노튜브 정제 = 58
• 3) 온도와 압력에 따른 영향 = 63
• 4) 기공지름과 기공부피에 따른 영향 = 69
• Ⅴ. 결론 = 72
• List of Tabes = 75
• List of Figure = 76
• 참고문헌 = 79