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목질계 바이오매스 열호학적 변환 고체 생성물 특성에 대한 실증적 상관관계 규명
박진제(Jinje Park),유승한(Seunghan Yu),김동희(Donghee Kim),이영재(Youngjae Lee),류창국(Changkook Ryu) 한국연소학회 2020 KOSCOSYMPOSIUM논문집 Vol.2020 No.9
Thermochemical conversion (e.g. torreffaction and slow pyrolysis) of biomass has been used to achieve the higher physical and chemical properties for target applications. In this study, empirical correlations for several properties (VM/FC ratio, atomic composition) of solid products from torrefaction and slow pyrolysis of biomass were derived from experiments and analysis of literature data. This study identified the normalized solid yield on a dry, ash-free basis as the key variable for deriving more accurate and comprehensive correlations from a huge collected data set. These correlation can provide desirable properties of pyrolysis solid product for target use before the actual design of the reactor type and heating method.
저속열분해를 통한 바이오매스 부산물의 바이오촤 특성 비교 분석
박진제(Jinje Park),이용운(Yongwoon Lee),류창국(Cahngkook Ryu),강기섭(Ki Seop Gang),양원(Won Yang),정진호(Jin-Ho Jung),현승훈(Seunghun Hyun) 한국연소학회 2013 KOSCOSYMPOSIUM논문집 Vol.- No.46
This study investigates the characteristics of biochar by slow pyrolysis at 500oC for various biomass residues. Six biomass materials were tested: Tree bark, Tree stem, bagasse, cocopeat, paddy straw and palm kernel shell. In the biochar yield, the effect of ash in the raw biomass was significant for paddy straw. Excluding the ash content, the timber bark, bagasse and paddy straw had a similar biochar yield of 26-29 wt.%. Tree stem and bagasse had well developed pores in a wide size range and large surface area over 200 m2/g. ocopeat and PKS has significantly higher biochar yield due to the increased content of lignin, but the development of intra-particle pores and microscopic surface area was very poor. The elemental composition, pH and other properties of the biochar samples were also compared.
바이오매스 가스화시 촤 입자 종류 및 반응시간에 따른 일차타르의 분해 특성
박진제(Jinje Park),이용운(Yongwoon Lee),류창국(Changkook Ryu) 한국연소학회 2014 KOSCOSYMPOSIUM논문집 Vol.2014 No.11
Gasification of biomass produces syngas containing CO, H₂ and/or CH₄, which can then be converted into energy or value-added fuels. One of key issues for efficient gasification is to minimize tar concentration in the syngas for use in a final conversion device such as gas engine. This study investigated the decomposition of primary tar by catalytic cracking using char as catalyst, of which the feature can be integrated into a fixed bed gasifier design. The pyrolysis vapor containing tar from pyrolysis of wood at 500℃ was passed through a reactor filled with or without char at 800℃ for a residence time of 1, 3 or 5 sec. Then, the condensable vapor (water and tar) and gases were analyzed for the yields and elemental composition. Four types of char particles with different microscopic surface area and pore size distribution: wood, paddy straw, palm kernel shell and activated carbon. The results were analyzed for the mass and carbon yields of tar and the composition of product gases to conclude the effects of char types and residence time.