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홍서혜(Seo-Hye Hong),김태영(TaeYoung Kim),이예지(Yeji Lee),이수출(SooChool Lee),김재창(JaeChang Kim) 한국환경에너지공학회 2023 한국열환경공학회 학술대회지 Vol.2023 No.2
The increasing amount of CO₂ being released into the atmosphere is affecting our lives in various ways, including causing natural disasters and destroying ecosystems. To address these environmental issues, Carbon Capture, Utilization, and Storage (CCUS) has been proposed as a method to reduce greenhouse gas emissions, specifically CO₂. In this research, a catalyst- absorbent composed of Ni as a catalyst and CaO as a CO₂ absorbent was used for the CO₂ capture and direct utilization process. The process involved absorbing CO₂ with CaO to form CaCO₃, which was then regenerated through a methanation reaction at 500°C using H₂ (Ni/CaCO₃ + 4H₂ - Ni/CaO + CH₄ + 2H₂O). This method prevented the thermal sintering of CaO caused by the high regeneration temperature (900°C) typically seen in the conventional CO₂ absorption- regeneration process using CaO. The approach demonstrated stability in multiple experiments, showing high CO₂ capture and CH₄ production rates. Consequently, the Ni/CaO catalyst- sorbent was effectively regenerated, activating the catalyst and converting captured CO₂ into useful chemicals, thereby reducing thermal energy and simplifying the current process.
암모니아 개질에 대한 Ni 촉매 특성: Ni 함량과 공간속도 비교
우진혁(JINHYEOK WOO),김태영(TAEYOUNG KIM),김주언(JU EON KIM),조병옥(BYUNGOK CHO),정석용(SUKYONG JUNG),박새미(SAEMI PARK),이수출(SOOCHOOL LEE),김재창(JAECHANG KIM) 한국수소및신에너지학회 2021 한국수소 및 신에너지학회논문집 Vol.32 No.6
A reforming catalyst for hydrogen production from ammonia is being studied. Non-novel metal based Ni catalysts for use in ammonia reforming processes are being developed. In this study, the ammonia reforming characteristics according to Ni content of the alumina pellet supported catalyst in the mid-temperature region were investigated under different space velocity. 20 Ni and 3,000 h<SUP>-1</SUP> showed the best catalytic activity with ammonia conversion of 63% among all conditions.
경질 탄화수소 촉매 열분해를 위한 Ni 기반 구슬 촉매에 대한 연구
우진혁(JINHYEOK WOO),김주언(JUEON KIM),김태영(TAEYOUNG KIM),이수출(SOOCHOOL LEE),김재창(JAECHANG KIM) 한국수소및신에너지학회 2024 한국수소 및 신에너지학회논문집 Vol.35 No.1
In this study, we researched Ni-based bead catalysts for the catalytic thermal decomposition of light hydrocarbons. A Ni-based bead-type catalyst was prepared, and catalytic thermal decomposition performance of light hydrocarbons was evaluated. The 30Ni/Al2O3 catalyst exhibited the most superior performance, with the presence of both fibrous and carbon black forms on the catalyst surface. Catalytic performance was evaluated for particles sized between 150-250 and 500 μm, with excellent catalytic thermal decomposition properties in the 150-250 μm range. After the reaction, carbon removal through collision between catalysts in the fluidized bed was observed. It was confirmed that as the particle size increases, the amount of carbon removed increases.