표제지
목차
초록 11
Ⅰ. 서론 14
1.1. 연구배경 14
Ⅱ. 실험 재료 및 방법 19
2.1. 시약 및 재료 19
2.2. 실험 방법 20
2.2.1. 폐플라스틱 탄화 공정 20
2.2.2. 활성화를 통한 다공성 흡착제 제조 20
2.3. 활성탄 특성화 24
2.3.1. 비표면적 및 기공 특성 분석 24
2.3.2. 형태학적 표면 특성 분석 25
2.3.3. 결정성 분석 25
2.3.4. 표면 화학 조성 분석 26
2.3.5. 적외선 분광기를 이용한 구조 분석 26
2.4. 흡착 평형 특성 27
2.4.1. CO₂, CH₄, N₂ 흡착 평형 실험 27
2.4.2. 흡착 평형 등온선 29
2.4.3. 흡착 열역학 31
2.4.4. 흡착 에너지 분포 32
2.4.5. 선택도 33
Ⅲ. 결과 및 고찰 34
3.1. 제조된 활성탄의 특성 분석 34
3.1.1. 구조 특성 분석 34
3.1.2. 형태학적 표면 특성 분석 46
3.1.3. XRD 분석을 통한 구조 분석 50
3.1.4. 표면 화학 조성 분석 53
3.1.5. FT-IR 분석을 통한 구조 분석 56
3.2. 폐플라스틱 기반 활성탄의 기체 흡착 평형 특성 58
3.2.1. CO₂ 흡착 특성 58
3.2.2. CH₄ 및 N₂ 흡착 특성 74
3.2.3. 선택도 특성 87
Ⅳ. 결론 96
Ⅴ. 참고문헌 99
Abstract 109
Scientific activity 112
Table 1. Properties of waste plastics and carbonization yield. 23
Table 2. Physical properties of CO₂, CH₄ and N₂ gas. 28
Table 3. Textural properties of PETAC-x, PSAC-x and PTTAC-x. 44
Table 4. Atomic percentages of the elements present in the surfaces of PETAC-x, PSAC-x and PTTAC-x. 55
Table 5. Isotherm parameters for CO₂ on PETAC-x, PSAC-x and PTTAC-x. 66
Table 6. Sips isotherm parameters for CO₂ on PETAC-x at 25, 35 and 45 ℃ 70
Table 7. Sips isotherm parameters for CO₂ on PSAC-x at 25, 35 and 45 ℃ 71
Table 8. Sips isotherm parameters for CO₂ on PTTAC-x at 25, 35 and 45 ℃ 72
Table 9. Adsorption capacity and Sips isotherm parameters for CO₂, CH₄ and N₂ on PETAC-x at 25 ℃, 101.3 kPa. 81
Table 10. Adsorption capacity and Sips isotherm parameters for CO₂, CH₄ and N₂ on PSAC-x at 25 ℃, 101.3 kPa. 82
Table 11. Adsorption capacity and Sips isotherm parameters for CO₂, CH₄ and N₂ on PTTAC-x at 25 ℃, 101.3 kPa. 83
Table 12. Recently reported porous carbons prepared and their textural properties and CO₂ capacity at atmospheric pressure. 95
Figure 1. Schematic procedure of waste plastics based activated carbon. 22
Figure 2. N₂ adsorption-desorption isotherms of (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x. 42
Figure 3. NLDFT pore size distribution curves and cumulative pore size distribution curves of (a and b) PETAC-x, (c and d) PSAC-x and (e and f) PTTAC-x. 43
Figure 4. N₂ adsorption energy distribution curves of (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x. 45
Figure 5. FE-SEM images of (a) PETAC-1, (b) PETAC-2, (c) PETAC-3 and (d) PETAC-4. HR-TEM images of (e) PETAC-1, (f) PETAC-2, (g) PETAC-3... 47
Figure 6. FE-SEM images of (a) PSAC-1, (b) PSAC-2, (c) PSAC-3 and (d) PSAC-4. HR-TEM images of (e) PSAC-1, (f) PSAC-2, (g) PSAC-3 and (h) PSAC-4. 48
Figure 7. FE-SEM images of (a) PTTAC-1, (b) PTTAC-2, (c) PTTAC-3 and (d) PTTAC-4. HR-TEM images of (e) PTTAC-1, (f) PTTAC-2, (g) PTTAC-3... 49
Figure 8. XRD patterns of (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x. 52
Figure 9. XRS survey spectra of (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x. 54
Figure 10. FT-IR spectrum of (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x. 57
Figure 11. CO₂ adsorption isotherms on (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x at 25 ℃. 65
Figure 12. CO₂ adsorption isotherms fitted by sips model on PETAC-x at (a) 25, (b) 35 and (c) 45 ℃. 67
Figure 13. CO₂ adsorption isotherms fitted by sips model on PSAC-x at (a) 25, (b) 35 and (c) 45 ℃. 68
Figure 14. CO₂ adsorption isotherms fitted by sips model on PTTAC-x at (a) 25, (b) 35 and (c) 45 ℃. 69
Figure 15. Isosteric heat of adsorption for CO₂ on (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x. 73
Figure 16. CO₂, CH₄ and N₂ adsorption isotherms fitting with Sips model on (a) PETAC-x, (b) PSAC-x and (c) PTTAC-x at 25 ℃. 80
Figure 17. Adsorption energy distributions of (a) CO₂, (b) CH₄ and (c) N₂ on PETAC-x. (d) AED curves of CO₂, CH₄ and N₂ on PETAC-2. 84
Figure 18. Adsorption energy distributions of (a) CO₂, (b) CH₄ and (c) N₂ on PSAC-x. (d) AED curves of CO₂, CH₄ and N₂ on PSAC-3. 85
Figure 19. Adsorption energy distributions of (a) CO₂, (b) CH₄ and (c) N₂ on PTTAC-x. (d) AED curves of CO₂, CH₄ and N₂ on PTTAC-2. 86
Figure 20. Adsorption selectivity of binary mixtures (a) CO₂/N₂, (b) CO₂/CH₄ and (c) CH₄/N₂ on PETAC-x. (d) Comparison of IAST selectivities on PETAC-1. 92
Figure 21. Adsorption selectivity of binary mixtures (a) CO₂/N₂, (b) CO₂/CH₄ and (c) CH₄/N₂ on PSAC-x. (d) Comparison of IAST selectivities on PSAC-1. 93
Figure 22. Adsorption selectivity of binary mixtures (a) CO₂/N₂, (b) CO₂/CH₄ and (c) CH₄/N₂ on PTTAC-x. (d) Comparison of IAST selectivities on PTTAC-1. 94