Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Analysis of Gas Emissions and Power Generation for Co-firing Ratios of NG, NH3, and H2 Based on NGCC

NGCC 기반 천연가스, 암모니아, 수소 혼소 발전 비율에 따른 CO2와 NOx 배출량 및 전력 생산량 분석

  • Inhye Kim (School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University) ;
  • Jeongjae Oh (School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University) ;
  • Taesung Kim (School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University) ;
  • Minsuk Im (School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University) ;
  • Sunghyun Cho (School of Chemical Engineering, School of Semiconductor and Chemical Engineering, Clean Energy Research Center, Jeonbuk National University)
  • 김인혜 (전북대학교 반도체.화학공학부) ;
  • 오정재 (전북대학교 반도체.화학공학부) ;
  • 김태성 (전북대학교 반도체.화학공학부) ;
  • 임민석 (전북대학교 반도체.화학공학부) ;
  • 조성현 (전북대학교 반도체.화학공학부)
  • Received : 2024.01.23
  • Accepted : 2024.06.12
  • Published : 2024.08.01
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Abstract

The reduction of CO2 emissions in the energy production sector, which accounts for 86.8% of total greenhouse gas emissions, is important to achieve carbon-neutrality. At present, 60% of total power generation in South Korea is coal and natural gas. Replacing fossil fuel with renewable energy such as wind and solar has disadvantages of unstable energy supply and high costs. Therefore, this study was conducted through the co-firing of natural gas, ammonia and hydrogen utilizing the natural gas combined cycle process. The results demonstrated reduction in CO2 emissions and 34%~238% of the power production compared to using only natural gas. Case studies on mass fractions of natural gas, ammonia and hydrogen indicated that power production and NOx emissions were inversely proportional to the ammonia ratio and directly proportional to the hydrogen ratio. This study provides guidelines for the use of various fuel mixtures and economic analysis in co-firing power generation.

탄소 중립 사회로의 전환을 위해 전체 온실가스 배출량의 86.8%를 차지하는 에너지 생산 부문에서의 이산화탄소 배출량 감축이 필요하다. 현재 우리나라는 총 발전량의 60%를 석탄과 천연가스에 의존하고 있으며 이를 풍력, 태양광 등의 재생에너지로 대체하는 방법은 에너지 수급이 불안정하고 비용이 높다는 단점이 있다. 이를 해결하기 위해 본 연구에서는 기존에 사용되고 있는 NGCC(Natural Gas Combined Cycle) 공정을 기반으로 천연가스, 암모니아, 수소를 혼합하여 연소한다는 해결책을 제시하였다. 시뮬레이션을 수행한 결과, 이산화탄소 배출량을 효과적으로 줄일 수 있었으며 천연가스만을 연료로 이용해 얻은 전력량과 비교하였을 때 34%~238%의 전력을 얻었다. 천연가스, 암모니아, 수소의 질량분율에 대한 사례연구를 수행한 결과, 암모니아 비율이 증가할수록 발전량과 NOx 배출량은 감소하였고 수소비율이 증가할수록 발전량과 NOx 배출량은 증가하였다. 본 연구는 추후 다양한 혼합 연료의 조합 및 경제성 평가 등 혼합 연료 발전 분야의 가이드라인이 될 수 있을 것이다.

Keywords

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