화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.18, No.2, 99-110, April, 2007
Export Citation
나노세공체 흡착제에 의한 수소 흡착 및 저장
Adsorption and Storage of Hydrogen by Nanoporous Adsorbents
정성화†, 장종산†
  • 한국화학연구원 그린화학촉매연구센터
Sung Hwa Jhung†, and Jong-San Chang†
  • Green Chemistry & Catalysis Research Center, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
E-mail:,
초록
21세기의 새로운 청정 에너지원으로 각광받고 있는 수소의 성공적인 활용을 위해 높은 저장 용량을 갖는 수소 저장체와 효과적인 수소 저장기술의 개발이 필요하다. 본 총설에서는 다양한 수소 저장 방법에 대해 간략히 요약하고 그 가운데 나노세공체를 이용한 저온 물리흡착에 의한 수소 저장기술의 현황에 대해 살펴보았다. 기존에 알려져 있는 고압의 압축 저장기술과 상온 고압의 수소저장 물질의 개발 이외에도 최근에는 높은 표면적과 큰 세공 부피를 갖는 나노세공체를 이용한 저온 물리흡착 방식이 개발 가능한 수소의 저장 기술의 하나로 활발히 연구되고 있다. 본 총설 에서는 높은 수소 저장 용량을 위해 필요한 나노세공체의 특성을 요약하였으며 높은 표면적 및 미세 세공부피, 작은 세공 크기, 큰 정전기장 및 불포화 배위자리가 필요함을 알 수 있었다. 최근까지 보고된 나노세공체 흡착제에 의한 수소 저장 능력을 정리하였는데 현재까지 보고된 최고의 결과로는 액체 질소 온도(-196 ℃)의 약 80 기압에서 약 7.5wt%의 수소를 저장할 수 있다고 알려져 있다. 향후 지속적이고 새로운 나노세공체의 설계, 합성, 제조 및 수식에 대한 노력을 통해 수소에너지 저장에 활용될 수 있는 효과적인 수소 저장체 개발을 기대한다.
Efficient and inexpensive hydrogen storage is an essential prerequisite for the utilization of hydrogen, one of the new and clean energy sources for 21st century. In this review, several storage techniques are briefly reviewed and compared. Especially, adsorption/storage via physisorption at low temperature, by using nanoporous adsorbents, is reviewed and evaluated for further developments. The adsorption over a porous material at low temperature is currently investigated deeply to fulfill the storage target. In this review, several characteristics needed for the high hydrogen adsorption capacity are introduced. It may be summarized that following characteristics are necessary for high storage capacity over porous materials: i) high surface area and micropore volume, ii) narrow pore size, iii) strong electrostatic field, and iv) coordinatively unsaturated sites, etc. Moreover, typical results demonstrating high storage capacity over nanoporous materials are summarized. Storage capacity up to 7.5 wt% at liquid nitrogen temperature and 80 atm is reported. Competitive adsorbents that are suitable for hydrogen storage may be developed via intensive and continuous studies on design, synthesis, manufacturing and modification of nanoporous materials.
Keywords:hydrogen;storage;adsorption;nanoporous material
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