목차

1. 서 론 1
1-1. 연구 배경 1
1-2. 국내외 연구 동향 2
1-3. 연구 목표 4
2. 열화학 사이클 5
2-1. 2 단계 물분해 열화학 반응 5
2-2. 금속산화물 7
2-2-1. 금속산화물의 정의 7
2-2-2. 실험에 사용할 수 있는 금속산화물의 선정 8
2-2-3. 금속산화물의 제조 방법 10
2-2-4. 실험에 사용된 금속산화물의 제원 13
3. 실험장치 및 방법 17
3-1. 실험장치 17
3-1-1. 접시형 태양열 집광 시스템 17
3-1-2. 화학반응기 22
3-1-2-1. 1차 반응기 22
3-1-2-2. 2차 반응기 24
3-1-2-3. 3차 반응기 26
3-1-3. 수증기 공급 장치 28
3-1-4. Chiller 31
3-1-5. G.C(Gas Chromatography) 31
3-2. 실험 방법 33
3-2-1. 질소 가스 Purging 단계 33
3-2-2. T-R(Thermal Reduction) 단계 33
3-2-3. W-D(Water Decomposition) 단계 33
3-2-4. 결과 데이터의 계산 35
4. 실험 결과 37
4-1. 1차 니켈-페라이트 금속산화물을 이용한 실험 37
4-2. 2차 니켈-페라이트 금속산화물을 이용한 실험 40
4-3. 3차 니켈-페라이트 금속산화물을 이용한 실험 43
4-4. 4차 니켈-페라이트 금속산화물을 이용한 실험 47
4-5. 1차 세륨 금속산화물을 이용한 실험 53
5. 결론 56
6. 참고 문헌 58
Table. 1 Available metal oxides 9
Table. 2 Reaction formula of available metal oxides 9
Table. 3 Specification of NiFeO4/m-ZrO2 Metal Oxide 15
Table. 4 Specification of CeO2 Metal Oxide 16
Table. 5 Specifications of the dish system 20
Table. 6 Specification of Dispensing Peristatic Pump 30
Table. 7 Hydrogen production and conversion rate of the first experiment 39
Table. 8 Hydrogen production and conversion rate of the second experiment 42
Table. 9 Hydrogen production and conversion rate of the third experiment 46
Table. 10 Hydrogen production and conversion rate of the fourth experiment 52
Table. 11 Hydrogen production and conversion rate of the fifth experiment 55
Fig. 1 Process of NiFe2O4/ZrO2 coat method 11
Fig. 2 Process of CeO2 coat method 12
Fig. 3(a) M.P.S.Z(MgO-partially-stabilized Zirconia foam) 14
Fig. 3(b) NiFeO4/m-ZrO2 Metal Oxide 14
Fig. 3(c) CeO2 Metal Oxide 15
Fig. 4 Dish type solar thermal system 19
Fig. 5 Schematic diagram of system 20
Fig. 6 Pyrheliometer (NIP&ST-1) 21
Fig. 7 Solar sensor 21
Fig. 8 Schematic of the first reactor 23
Fig. 9 The front of the first reactor 23
Fig. 10 Schematic of the second reactor 25
Fig. 11 The front of the second reactor 25
Fig. 12 Schematic of the third reactor 27
Fig. 13 The front or side of the third reactor 27
Fig. 14 Schematic of generating steam system 29
Fig. 15 Steam generator 29
Fig. 16 Chiller 32
Fig. 17 Gas Chromatography (Agilent 7890A) 32
Fig. 18 Schematic of the two-step cycle 34
Fig. 19 Sample data for detecting a hydrogen gas 36
Fig. 20 Insolation and metal oxide surface temperature of the first experiment 38
Fig. 21 Metal oxide shape after the first experiment 38
Fig. 22 Quart window shape after the first experiment 39
Fig. 23 Amount of hydrogen production of the first experiment 39
Fig. 24 Sintering phenomenon after the first experiment 41
Fig. 25 Insolation and metal oxide surface temperature of the second experiment (a) 1st cycle (b) 2nd cycle 41
Fig. 26 Amount of hydrogen production of the second experiment (a) 1st cycle (b) 2nd cycle 42
Fig. 27 Insolation and metal oxide surface temperature of the third experiment (a) 1st cycle (b) 2nd cycle (c) 3rd cycle (d) 4thcycle (e) 5th cycle 44
Fig. 28 Amount of hydrogen production of the third experiment (a) 1st cycle (b) 2nd cycle (c) 3rd cycle (d) 4thcycle (e) 5th cycle 45
Fig. 29 Insolation and metal oxide surface temperature of the fourth experiment (a) 1st cycle (b) 2nd cycle (c) 3rd cycle (d) 4th cycle 48
Fig. 30 Insolation and metal oxide surface temperature of the fourth experiment (e) 5th cycle (f) 6th cycle (g) 7th cycle (h) 8th cycle (i) 9th cycle 49
Fig. 31 Amount of hydrogen production of the fourth experiment (a) 1st cycle (b) 2nd cycle (c) 3rd cycle (d) 4th cycle 50
Fig. 32 Amount of hydrogen production of the fourth experiment (e) 5th cycle (f) 6th cycle (g) 7th cycle (h) 8th cycle (i) 9th cycle 51
Fig. 33 Insolation and metal oxide surface temperature of the first experiment (a) 1st cycle (b) 2nd cycle 54
Fig. 34 Amount of hydrogen production of the fifth experiment (a) 1st cycle (b) 2nd cycle 55