직접 및 간접열교환에 따른 연속식 반응기 내 바이오매스 저속열분해 특성에 대한 실험적 연구

• Published in: 한국연소학회지 Vol. 24; no. 3; pp. 33 - 40
• Main Authors: 박정극(Jungkeuk Park), 김상호(Sangho Kim), 박진제(Jinje Park), 유승한(Seunghan Yu), 류창국(Changkook Ryu)
• Format: Journal Article
• Language: Korean
• Published: 한국연소학회 01.09.2019
• Subjects: 기계공학; Biomass; Biochar; Wood pellet; Continuous reactor; Slow pyrolysis
• ISSN: 1226-0959; 2466-2089
• DOI: 10.15231/jksc.2019.24.3.033

Biochar from pyrolysis is emerging as a new option for biomass utilization for various purposes including soil amelioration and carbon sequestration. This study investigated the slow pyrolysis characteristics of wood pellet in a continuous reactor varying the heat transfer type (direct and indirect contact) at various temperatures (400~700℃) with different carrier gas compositions (inert, O2 2%, and O2 4%). Direct contact heat transfer by preheated carrier gas accelerated the heat up of biomass, promoting the pyrolysis process as well as the temperature increase of indirect contact cases. The presence of O2 in the carrier gas resulted in limited oxidation reactions with pyrolytic vapor, increasing the reactor temperature to 529.4℃ and 591.7℃ at 2% and 4% O2, respectively, compared to the inert case having a final temperature of 492.4℃. This can be exploited to save the external heat supply but a careful temperature control is required to yield uniform biochar properties. The pyrolysis products from different test conditions were characterized for mass yield and detailed properties of biochar, bio-oil, and non-condensable gases. KCI Citation Count: 0