매체순환 산화 탈수소화용 산소전달입자 연구 = A study on MgnV2O5+n Oxygen Carrier for Chemical Looping Oxidative Dehydrogenation

다국어 초록 (Multilingual Abstract)

Ethylene is a billding block of chemical industry, and the development of efficient ethylene production processes is highlt important. The Chemical Looping Oxidativedehydrogenation of Ethane (CL-ODHE) process is emerging as an attractive alternative. In this study, the applicability of MgnV2O5+n structures as Oxygen Carriers (OCs), which are critical role determining the process performance in CL-ODHE. was investigated, and a design strategy for OCs to enhance efficiency was proposed. MgnV2O5+n OCs were synthesized via sol-gel method. MgnV2O5+n were investivgated by XRD, H2-TPR, CO2-TPD, ODH performance evaluation. The MgnV2O5+n OCs showed a tendency for reducibility to increse with increasing Mg contenet. Mg2V2O7 showed that effective adjust structure stabillity and lattice oxugen mobility through the formation of surface Mg2V6O17 layer. By moderating excessice surface basicity, it suppressed over oxidation and improved ethylene selectivity, achiecing an ethylene selectivtiy of 82.27% and ethylene yield of 15.57%. This study confirmed the applicability of MgnV2O5+n OCs for the CL-ODHE process. Notably, Mg2V2O7 was able to control lattice oxygen mobility through the formation of the Mg2V6O17 surface layer during cycling. This lattice oxygen control via surface layer formation is suggested as a crucial design strategy for the development of high-performance oxygen carriers.

목차 (Table of Contents)

• 1. 서론 1
• 2. 실험방법 14
• 2.1. 산소전달입자 준비 14
• 2.2. 산소전달입자 특성분석 및 성능평가 16
• 2.2.1. X선 회절 분석법 (X-Ray Diffraction, XRD) 16
• 2.2.2. 수소 승온 환원 및 이산화탄소 승온 탈착 분석법 (Hydrogen-Temperature Programmed Reduction & Carbon dioxide-Temperature Programmed Desorption, H2-TPR & CO2-TPD) 16
• 2.2.3. 산소전달입자 성능평가 17
• 3. 결과 및 고찰 19
• 3.1. 산소전달입자 결정 및 입자 특성분석 19
• 3.1.1. X선 회절 분석법 (XRD) 19
• 3.1.2. 수소 승온 환원 분석법 (H2-TPR) 25
• 3.1.3 이산화탄소 승온 탈착 분석법 (CO2-TPD) 30
• 3.2. 산소전달입자 성능평가 33
• 4. 결론 42
• References 44
• Abstract 54