• 신재생에너지
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• 제18권3호
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• pp.1-9
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• 2022

This study analyzed the anticipated supply-and-demand of forest biomass energy (through wood pellets) until 2050, in South Korea. Comparing the utilization rates of forest resources of five countries (United Kingdom, Germany, Finland, Japan, and S. Korea), it was found that S. Korea does not nearly utilize its forest resources for energy purposes. The total demand for wood pellets in S. Korea (based on a power generation efficiency of 38%) was predicted to be 3,629 and 4,371 thousand tons in 2034 and 2050, respectively. The anticipated total wood pellet power generation ratio to target power consumption is 1.13% (5,745 GWh), 1.17% (6,336 GWh), and 1.25% (7,631 GWh) in 2020, 2030, and 2050, respectively. Low value-added forest residues left unattended in forests are called "Unused Forest Biomass" in S. Korea. From the analysis, the total annual potential amount of raw material, sustainably collectible amount, and available amount of wood pellet in 2050 were estimated to be 6,877, 4,814, and 3,370 thousand tons, respectively. The rate of contribution to Nationally Determined Contributions was up to 0.64%. Through this study, the authors found that forest biomass energy will contribute to a carbon neutral society in the near future at the national level.

• 한국태양에너지학회 논문집
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• 제26권2호
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• pp.43-51
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• 2006

New renewable energy information becomes one of the greatest issues all over the world because of serious environment problems and limited fossil resources. The new renewable energy source information system is treated seriously for efficient management and distribution as dealing with these energy problems. However, it is difficult to manage and utilize new renewable energy information because gathering and surveying information is progressed individually in each research field. Therefore this paper will establish ISP(Information Strategy Planning) and propose the basic management system based-on GIS to analyze new renewable energy such as solar energy, wind power, small hydro, biomass, geothermal etc. and build the integration management system. The proposed integration management system can provide spatial analysis using thematic map, data search, data import/export and interpolation about users' queries.

• 펄프종이기술
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• 제46권1호
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• pp.18-28
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• 2014

Renewable Portfolio Standards(RPS) is a regulation that requires a renewable energy generated from eco-friendly energy sources such as biomass, wind, solar, and geothermal. The RPS mechanism generally is an obligatory policy that places on electricity supply companies to produce a designated fraction of their electricity from renewable energies. The domestic companies to supply electricity largely rely on wood pellets in order to implement the RPS in spite of undesirable situation of lack of wood resources in Korea. This means that the electricity supply companies in Korea must explore new biomass as an alternative to wood. Palm kernel shell (PKS) and empty fruit bunch (EFB) as oil palm wastes can be used as raw materials used for making pellets after their thermochemical treatment like torrefaction. Torrefaction is a pretreatment process which serves to improve the properties including heating value and energy densification of these oil palm wastes through a mild pyrolysis at temperature typically ranging between 200 and $300^{\circ}C$ in the absence of oxygen under atmospheric pressure. Torrefaction of oil palms wastes at above $200^{\circ}C$ contributed to the increase of fixed carbon with the decrease of volatile matters, leading to the improvement of their calorific values over 20.9 MJ/kg (=5,000 kcal/kg) up to 25.1 MJ/kg (=6,000 kcal/kg). In particular, EFB sensitively responded to torrefaction because of its physical properties like fiber bundles, compared to PKS and hardwood chips. In conclusion, torrefaction treatment of PKS and EFB can greatly contribute to the implement of RPS of the electricity supply companies in Korea through the increased co-firing biomass with coal.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2004년도 학술발표논문집
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• pp.112-112
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• 2004

• Journal of Forest and Environmental Science
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• 제20권1호
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• pp.110-130
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• 2004

본 연구에서는 대체에너지로서의 바이오매스에너지원의 정의와 특성 등을 살펴보고, 국내에서의 바이오매스 에너지원의 잠재력과 이용가능성에 대해서 검토하였다. 특히 임지잔재, 간벌재 등의 목질바이오매스는 자원량이 풍부하고, 임업 임산업의 활성화와 인공림의 간벌작업을 촉진하여 산림의 공익적 기능을 증대시킬 수 있는 에너지 자원으로서, 앞으로 지속적인 산림관리를 위한 새로운 임업의 과제가 될 것으로 판단된다.

• 공업화학
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• 제24권6호
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• pp.579-586
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• 2013

화석 연료의 고갈 및 온실가스 배출문제로 인해 보다 환경 친화적인 바이오매스 유래의 고분자 생산에 대한 연구가 진행되고 있다. 폴리우레탄은 -OH 화합물과 -NCO 화합물의 중합반응에 의해 생성된 우레탄(-NHCOO-) 결합을 포함하는 고분자 화합물을 통칭하며 자동차, 건축, 화학 분야에서 가장 광범위하게 사용된다. 폴리우레탄의 원료인 폴리올과 이소시아네이트는 식물성 천연유지, 셀룰로오스, 리그닌 등 재생 가능한 바이오매스로부터 생산이 가능하다. 식물성 천연유지 유래의 바이오폴리올은 이미 상업적 규모로 생산되고 있다. 본 총설은 다양한 바이오매스로부터 바이오폴리올, 바이오이소시아네이트, 이소시아네이트 대체화합물 관련 최신 기술개발 동향 및 이를 기반으로 합성된 바이오폴리우레탄의 특성을 평가하고, 바이오폴리우레탄의 응용분야와 함께 전망을 분석하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 춘계학술대회 논문집
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• pp.225-228
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• 2008

This study shows that lignocellulosic biomass saccharification work has been carried out with rice-straw by the extracellular enzyme from KMU001, and the enzymes produced in 5%(w/v) wood biomass were characterized by protein and various enzyme activity measurements. Several cellulases such as Endoglucanase(EG), $\beta$-D-1,4-Glucosidase(BGL), Cellobiohydrolase(CBH), and $\beta$-D-1,4-Xylanase (BXL) were detected. Saccharification of rice-straw by the enzyme yielded about 233mg/g of glucose after 48hrs.

• 한국수소및신에너지학회논문집
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• 제29권5호
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• pp.503-511
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• 2018

There have been many studies of combustion in the circulating fluidized bed. However, little study is available for combustion of wood pellet together fed with wood chip. The mixed ratio of two fuels is an useful information when thermal power company would receive the Renewable Energy Portfolio Standard (RPS) from government. In this study, the combustion behavior and kinetics of such biomass fuels are evaluated using fluidized bed reactor and thermogravimetric analyzers. The mixing ratio of wood chip relative to wood pellet was varied at different temperatures. The results show that a combustion reactivity changed significantly at the wood chip mixing ratio of 40%, particularly at low temperature condition.

• 펄프종이기술
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• 제42권5호
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• pp.1-14
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• 2010

Bio-ethanol is a promising alternative energy source for reducing both consumption of crude oil and environmental pollution from renewable resources like lignocellulosic biomass such as wood, forest residuals, agricultural leftovers and urban wastes. Based on current technologies, the cost of ethanol production from lignocellulosic materials is relatively high, and the main challenges are the low yield and high cost of the hydrolysis process. Development of more efficient pretreatment technology (physical, chemical, physico-chemical, and biological pretreatment), integration of several microbiological conversions into fewer reactors, and increasing ethanol production capacity may decrease specific investment for ethanol producing plants. The purpose of pretreatment of lignocellulosic material is to improve the accessible surface area of cellulose for hydrolytic enzymes and enhance the conversion of cellulose to glucose and finally high yield ethanol production which is economic and environmental friendly.

• 신재생에너지
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• 제10권4호
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• pp.16-21
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• 2014

Advanced biofuels are recognized as a key tool to mitigate the $CO_2$ emissions in the transport sector. Active R&D works have been carried out but there are still some major barriers to implement the technology. In this paper, recent developments on the advanced biofuels' technology are reviewed and the major barriers to commercialization of the biofuels will be discussed.