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고온 태양열을 이용한 합성가스 및 수소 생산에서 CeO2/ZrO2가 코팅된 다공성 폼의 영향
장종탁(Jang, Jong-Tak),윤기준(Yoon, Ki-June),한귀영(Han, Gui-Young) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.11
금속산화물을 이용한 2단계 산화/환원 반응은 GTL,CTL 의 반응원료인 합성가스 및 수소 생산기술이다.이 기술은 메탄을 환원제로 사용함으로써 비교적 저온에서 산화/환원 반응을 할 수 있는 장점이 있다.하지만 반복 사이클의 시연에서 금속산화물의 소결현상으로 인한 활성저하가 이 기술의 문제점 중의 하나이다. 본 연구에서는 2.5kW Xenon arclamp 가 설치된 solarsimulator를 사용 하였으며,무기물 다공성 폼 (SiC foam)및 유기물 다공성 폼 (Ni,Cufoam)에 CeO2/ZrO2 를 코팅하여 연속적인 합성가스 및 수소 생산 가능성을 알아보았다.반응 전 후의 CeO2/ZrO2 의 결정 구조를 SEM 과 XRD 를 통해 분석하였다.
합성가스 및 수소 생산을 위한 CeO2/ZrO2 nanotube 의 산화/환원 반응 특성
장종탁(Jang, Jong-Tak),이종민(Lee, Jong-Min),조은수(Cho, Eun-Su),윤기준(Yoon, Ki-June),한귀영(Han, Gui-Young) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
Syngas and hydrogen production process bv redox system of metal oxide was performed under direct irradiation of the metal oxide on the SiC ceramic foam device using solar simulator. CeO2/ZrO2 nanotube has been synthesized by anodic oxidation method. Syngas and hydrogen production process is one of the promising chemical pathway for storage and transportation of solar heat by converting solar energy to chemical energy. The produced syngas had the H2/CO ratio of 2, which was suitable for methanol synthesis or Fischer-Tropsch synthesis process. When the methane reforming-water splitting cyclic reactions were repeatedm the yield of syngas and hydrogen decreased from the first cycle to the second cycle, but from the second cycle to the fifth cycle the fas yields were maintained nearly constant.
고온 태양열을 이용한 합성가스 및 수소 생산 : ZrO2나노 구조화에 따른 산화/환원 특성
장종탁(Jang Jong-Tak),이종민(Lee Jong-Min),조은수(Cho Eun-Su),양승찬(Yang Seung-Chan),윤기준(Yoon Ki-June),한귀영(Han Gui-Young) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.3
Solar thermochemical syngas and hydrogen production process by redox system of metal oxide was performed under direct irradiation of the metal oxide on the SiC ceramic foam device using solar simulator. CeO2/ZrO2 nanotube has been synthesized by anodic oxidation method. Syngas and hydrogen production process is one of the promising chemical pathway for storage and transportation of solar heat by converting solar energy to chemical energy. The produced syngas had the H2/CO ratio of 2, which was suitable for methanol synthesis or Fischer-Tropsch synthesis process. After ten cycles of redox reaction, CeO2 was analyzed using XRD pattern and SEM image in order to characterize the physical and chemical change of metal oxide at the high temperature.
다공성 폼에 코팅된 CeO2/ZrO2를 이용한 고온 태양열 합성가스 및 수소 생산 연구
장종탁(Jang Jong-Tak),윤기준(Yoon Ki-June),한귀영(Han Gui-Young) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.3
Syngas and hydrogen from the CeO2/ZrO2 coated foam devices were investigated under simulated solar radiation. The CeO2/ZrO2 coated SiC, Ni and Cu foam device were prepared using drop-coating method. Syngas production step was performed at 900℃, and hydrogen production process was performed for ten repeated cycles to compare the CeO2 conversion in syngas production step, H2 yield in hydrogen production step and cycle reproducibility. The produced syngas had the H2/CO ratio of 2, which was suitable for methanol synthesis or Fischer-Tropsch synthesis process. In addition, syngas and hydrogen production process is one of the promising chemical pathway for storage and transportation of solar heat by converting solar energy to chemical energy. After ten cycles of redox reaction, the CeO2/ZrO2 was analyzed using XRD pattern and SEM image in order to characterize the physical and chemical change of metal oxide at the high temperature.
고온 태양열이 집열된 CeO₂-ZrO₂ 혼합산화물을 이용하여 메탄과 물로부터 합성가스 및 수소 생산
장종탁(Jang, Jong-Tak),윤기준(Yoon, Ki-June),한귀영(Han, Gui-Young) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
Syngas and hydrogen production from Ce1-XZrXO₂ solid solution was investigated under simulated solar radiation. The Ce1-XZrXO₂ solid solution (x = 0.2, 0.5, 0.7) was prepared by using precipitation method. The methane reforming (reduction) and water splitting (oxidation) were performed at 900℃.The produced syngas had the H₂/CO ratio of 2.0, which was suitable for methanol synthesis or Fischer-Tropsch synthesis process. In addition, syngas and hydrogen production process is one of the promising chemical pathway for storage and transportation of solar heat by converting solar energy to chemical energy. The methane reforming-water splitting were performed for five repeated cycles to compare the CeO₂ conversion, H₂ yield, H₂/CO ratio and the cycle reproducibility.
Ce1-XZrXO2 solid solution 의 산화/환원 반응을 이용한 합성가스 및 수소 생산
장종탁(Jang, Jong-Tak),조은수(Cho, Eun-Su),이종민(Lee, Jong-Min),양승찬(Yang, Seung-Chan),윤기준(Yoon, Ki-June),한귀영(Han, Gui-Young) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
Syngas and hydrogen production from Ce1-XZrXO2 solid solution was investigated under simulated solar radiation. The Ce1-XZrXO2 solid solution (x = 0.2, 0.5, 0.7) was prepared by using precipitation method. The methane reforming (reduction) and water splitting (oxidation) were performed at 900℃.The produced syngas had the H2/CO ratio of 2.0, which was suitable for methanol synthesis or Fischer-Tropsch synthesis process. In addition, syngas and hydrogen production process is one of the promising chemical pathway for storage and transportation of solar heat by converting solar energy to chemical energy. The methane reforming-water splitting were performed for five repeated cycles to compare the CeO2 conversion, H2 yield, H2/CO ratio and the cycle reproducibility.
고온 태양열 열화학사이클을 이용한 합성가스 및 수소생산
장종탁(Jang,Jong-Tak),한영규(Han Young-Kyu),윤기준(Yoon Ki-June),한귀영(Han Gui-Young) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
금속산화물을 이용한 2단계 산화/환원 반응은 GTL, CTL 의 반응원료인 합성가스 및 수소 생산 기술이다. 이 기술은 메탄을 환원제로 사용함으로써 비교적 저온에서 산화/환원 반응을 할 수 있는 장점이 있다. 하지만 반복 사이클의 시연에서 금속산화물의 소결현상으로 인한 활성저하가 이 기술의 문제점 중의 하나이다. 본 연구에서는 2.5 ㎾ Xenon arc lamp 가 설치된 solar simulator 와 inconel 로 제작된 반응기를 사용 하였으며, 기존 논문에 보고되었던 WO₃ 와 우수한 활성이 기대되는 CeO₂ 를 이용하여 반응특성을 알아보았다. 또한, 금속산화물의 소결현상을 억제하기 위해 열적 안정성이 우수한 ZrO₂ 를 금속산화물의 지지체로 사용함으로써 연속적인 합성가스 및 수소 생산 가능성을 알아보았다.