Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Valorizing Cattle Manure to Syngas via Catalytic Pyrolysis with CO2

이산화탄소-촉매 열분해 활용 우분 유래 합성가스 증대 연구

  • Lee, Dong-Jun (Animal Environment Division, National Institute of Animal Science) ;
  • Jung, Jong-Min (Animal Environment Division, National Institute of Animal Science) ;
  • Kim, Jung Kon (Animal Environment Division, National Institute of Animal Science) ;
  • Lee, Dong-Hyun (Animal Environment Division, National Institute of Animal Science) ;
  • Kim, Hyunjong (Animal Environment Division, National Institute of Animal Science) ;
  • Park, Young-Kwon (School of Environmental Engineering, University of Seoul) ;
  • Kwon, Eilhann E. (Department of Earth Resources and Environmental Engineering, Hanyang University)
  • 이동준 (국립축산과학원 축산환경과) ;
  • 정종민 (국립축산과학원 축산환경과) ;
  • 김중곤 (국립축산과학원 축산환경과) ;
  • 이동현 (국립축산과학원 축산환경과) ;
  • 김현종 (국립축산과학원 축산환경과) ;
  • 박영권 (서울시립대 환경공학부) ;
  • 권일한 (한양대학교 자원환경공학과)
  • Received : 2022.11.22
  • Accepted : 2022.12.15
  • Published : 2022.12.30
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Abstract

To abate the environmental burden derived from the massive generation of cattle manure (CM), pyrolysis of CM was suggested as one of the methods for manure treatment. In respect of carbon utilization, pyrolysis has an advantage in that it can produce usable carbon-based chemicals. This study was conducted to investigate a syngas production from pyrolysis of CM in CO2 condition. In addition, mechanistic functionality of CO2 in CM pyrolysis was investigated. It was found that the formation of CO was enhanced at ≥ 600 ℃ in CO2 environment, which was attribute to the homogeneous reactions between CO2 and volatile matters (VMs). To expedite reaction kinetics for syngas production during CM pyrolysis, Catalytic pyrolysis was carried out using Co/SiO2 as a catalyst. The synergistic effects of CO2 and catalyst accelerate the formation of H2 and CO at entire temperature range. Thus, this result offers that CO2 could be a viable option for syngas production with the mitigation of greenhouse gas.

가축분뇨의 대량 발생에 따른 환경적 부담을 완화하기 위해 가축분뇨의 열분해를 가축분뇨 처리 방법 중 하나로 제시하였다. 탄소 활용 측면에서, 열분해는 분뇨로부터 유용한 탄소 기반 물질을 생산할 수 있다는 장점이 있다. 본 연구는 우분 열분해 과정에서 이산화탄소 적용에 따른 합성가스 발생 특성을 연구하기 위해 수행되었다. 실험결과, 이산화탄소 조건에서 600 ℃이상에서 일산화탄소 가스 발생량이 증가하는 것으로 나타났는데, 이는 이산화탄소와 우분 유래 휘발성물질의 균질반응에 기인한다. 우분 열분해 시 합성가스 증대를 위해, Co/SiO2를 활용하여 촉매 열분해 실험을 추진하였다. 촉매를 이용한 우분 열분해 시 합성가스인 수소와 일산화탄소가 모든 온도 영역에서 크게 증가하는 것으로 나타났으며, 이를 통해 이산화탄소가 가축분뇨 열분해를 통한 합성가스 생산에 활용 가능함을 알 수 있었다.

Keywords

Acknowledgement

본 결과물은 농림축산식품부의 재원으로 농림식품기술기획평가원의 2025 축산현안대응산업화기술개발사업의 지원을 받아 연구되었음(과제번호: 321090-02)

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