Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Operation Characteristics of a Plasma Reformer for Biogas Direct Reforming

바이오가스 직접 개질을 위한 플라즈마 수소 추출기 운전 특성 연구

  • Byungjin Lee (Hydrogen Energy Solution Center, Institute for Advanced Engineering) ;
  • Subeen Wi (Hydrogen Energy Solution Center, Institute for Advanced Engineering) ;
  • Dongkyu Lee (Hydrogen Energy Solution Center, Institute for Advanced Engineering) ;
  • Sangyeon Hwang (Hydrogen Energy Solution Center, Institute for Advanced Engineering) ;
  • Hyoungwoon Song (Hydrogen Energy Solution Center, Institute for Advanced Engineering)
  • 이병진 (고등기술연구원 수소에너지솔루션센터) ;
  • 위수빈 (고등기술연구원 수소에너지솔루션센터) ;
  • 이동규 (고등기술연구원 수소에너지솔루션센터) ;
  • 황상연 (고등기술연구원 수소에너지솔루션센터) ;
  • 송형운 (고등기술연구원 수소에너지솔루션센터)
  • Received : 2023.04.05
  • Accepted : 2023.06.05
  • Published : 2023.08.10
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Abstract

For the direct reforming of biogas, a three-phase gliding arc plasma reformer was designed to expand the plasma discharge region, and the operation conditions of the plasma reformer, such as the S/C ratio, the gas flow rate, and the plasma input power, were optimized. The H2 production efficiency is increased at a lower specific plasma input energy density, but byproducts such as CXHY and carbon soot are generated along with the increase in H2 production efficiency. The formation of byproducts is decreased at higher specific plasma input energy densities and S/C ratios. The optimized operation conditions are 5.5 ~ 6.0 kJ/L for the specific plasma input energy density and 3 for the S/C ratio, considering the conversion efficiency, H2 production, and byproduct formation. It is expected that the H2 production efficiency will improve with the decrease in fuel consumption in biogas burners because the heat generated from plasma discharge heats up the feed gas to over 500 ℃.

바이오가스 직접 개질을 위해 플라즈마 방전영역을 확장할 수 있는 3상 글라이딩 아크 플라즈마 수소 추출기를 설계하고 스팀과 메탄의 부피 비율, 가스 유량, 플라즈마 입력 전력에 대해 개질 특성을 평가하여 운전 조건을 최적화했다. 수소생산효율은 플라즈마 에너지 밀도가 작을수록 증가하는 것으로 확인되었지만 CXHY 혹은 carbon soot와 같은 촉매 내구성에 영향을 줄 수 있는 부산물들이 발생했다. 부산물 생성을 억제하기 위해 스팀과 메탄의 비율 혹은 플라즈마 에너지 밀도를 높여야 했고 플라즈마 개질기 최적 조건으로 스팀과 메탄의 비율을 3, 플라즈마 에너지 밀도를 5.5 ~ 6.0 kJ/L로 선정했다. 또한 플라즈마 개질기에서 발생하는 열이 반응가스를 500 ℃ 이상까지 올려줄 수 있어 바이오가스 버너의 연료사용량을 줄여 수소생산효율을 높일 수 있을 것으로 기대할 수 있다.

Keywords

Acknowledgement

본 결과물은 농림축산식품부 및 과학기술정보통신부, 농촌진흥청의 재원으로 농림식품기술기획평가원과 재단법인 스마트팜연구개발사업단의 스마트팜다부처패키지혁신기술개발사업의 지원을 받아 연구되었음(421045-03)

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