Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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A Study on the Performance of Ni Catalysts in Biogas Steam Reforming: Impact of Supports and Precipitation Agent Injection Rates

바이오가스 수증기 개질 반응용 Ni 촉매 성능 연구: 지지체 및 침전제 주입 속도에 따른 영향

  • Ji-Hyeon Gong (Department of Environmental Engineering, Ajou University) ;
  • Min-Ju Kim (Department of Environmental Engineering, Ajou University) ;
  • Kyung-Won Jeon (Department of Environmental and Safety Engineering, Ajou University) ;
  • Won-Jun Jang (Department of Environmental Engineering, Ajou University)
  • 공지현 (아주대학교 환경공학과) ;
  • 김민주 (아주대학교 환경공학과) ;
  • 전경원 (아주대학교 환경안전공학과) ;
  • 장원준 (아주대학교 환경공학과)
  • Received : 2023.12.13
  • Accepted : 2023.12.18
  • Published : 2023.12.31
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Abstract

This study investigated synthesis gas production via steam reforming of biogas. Ni-Al2O3 and Ni-CeO2 catalysts were synthesized using the co-precipitation method, with controlled precipitation agent injection rates. Catalytic performances were tested at various temperatures, with a gas composition ratio of CH4:CO2:H2O = 1:0.67:3 and a gas hourly space velocity (GHSV) of 647,000 mL h-1 gcat-1. The rate of precipitation agent injection influenced the characteristics of the catalysts depending on the type of support used. As the temperature increased, both the CO2 reforming of methane and the reverse water gas shift reactions occurred. The Ni-Al2O3 catalyst, synthesized with a single injection of the precipitation agent, exhibited the best catalytic activity under conditions with sufficient steam supply among the prepared catalysts, due to its high Ni dispersion.

본 연구에서는 바이오가스 수증기 개질을 통한 합성가스 생산에 관해 연구했다. Ni-Al2O3 및 Ni-CeO2 촉매는 공침법으로 제조되었으며 침전제 주입 속도가 조절되었다. 온도에 따른 촉매 성능 테스트는 CH4:CO2:H2O = 1:0.67:3의 가스 조성비와 647,000 mL h-1 gcat-1의 공간속도에서 진행하였다. 침전제 주입 속도는 촉매 특성에 영향을 미쳤으며, 지지체 종류에 따라 결과를 보였다. 온도가 증가함에 따라 이산화탄소 개질 반응과 reverse water gas shift 반응이 일어났다. 수증기가 충분히 공급되는 조건에서는 침전제를 한 번에 투입하여 제조된 Ni-Al2O3 촉매가 높은 Ni 분산도에 기인하여 가장 우수한 성능을 보였다.

Keywords

Acknowledgement

이 논문은 2023년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(No. 2021R1I1A3048595).

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