• Title, Summary, Keyword: forest biomass energy

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Estimation of Biomass Resources Potential (바이오매스 자원 잠재량 산정)

  • Lee, Joon-pyo;Park, Soon-chul
    • Journal of the Korean Solar Energy Society
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    • v.36 no.1
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    • pp.19-26
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    • 2016
  • Biomass has been used for energy sources from the prehistoric age. Biomass are converted into solid, liquid or gaseous fuels and are used for heating, electricity generation or for transportation recently. Solid biofuels such as bio-chips or bio-pellet are used for heating or electricity generation. Liquid biofuels such as biodiesel and bioethanol from sugars or lignocellulosics are well known renewable transportation fuels. biogas produced from organic waste are also used for heating, generation and vehicles. Biomass resources for the production of above mentioned biofuels are classified under following 4 categories, such as forest biomass, agricultural residue biomass, livestock manure and municipal organic wastes. The energy potential of those biomass resources existing in Korea are estimated. The energy potential for dry biomass (forest, agricultural, municipal waste) were estimated from their heating value contained, whereas energy potential of wet biomass (livestock manure, food waste, waste sludge) is calculated from the biological methane potential of them on annual basis. Biomass resources potential of those 4 categories in Korea are estimated to be as follows. Forest biomass 355.602 million TOE, agricultural biomass 4.019 million TOE, livestock manure biomass 1.455 million TOE, and municipal organic waste 1.074 million TOE are available for biofuels production annually.

Biomass Energy Potential of Wood Waste due to Forest Land Conversion (산림전용에 따른 폐잔목의 임산바이오에너지 잠재적 공급량 분석)

  • Kwon, Soon-Duk;Son, Yeong-Mo;Park, Young-Kyu
    • Journal of Korea Foresty Energy
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    • v.25 no.2
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    • pp.16-21
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    • 2006
  • This study aimed to assess biomass energy resources available from waste wood due to forest land conversion. Forest land area of 7,806ha on annul average during 2001-2005 was converted to other land use and the growing stock of $266,551m^3$ was felled annually due to the conversion. Biomass energy potential of waste wood due to forest land conversion was estimated to 102,325 tons of biomass on annual average during 2001-2005 of which 57,945 tons were from coniferous forest and 44,379 tons were from broadleaved forest. Biomass energy Potential Per unit area Per year increased for the same period and was estimated to 13.0 tons of biomass on annual average.

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Energy potential and feasibility of utilization for domestic forest biomass as an alternative resource (대체에너지원으로서 국내 산림바이오매스 자원의 잠재력과 이용가능성)

  • Cha, Du Song;Oh, Jae Heun;Woo, Jong Chun
    • Journal of Forest and Environmental Science
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    • v.20 no.1
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    • pp.110-130
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    • 2004
  • This study aims to study the definition and characteristics of forest biomass as an alternative energy and to estimate the energy potential and feasibility of forest biomass utilization in domestic. Especially, significant attention is given to woody biomass such as forest residue, thinning log, etc. due to their renewable, sustainable and abundant properties. The results were summarized as follows. The utilization of these forest biomass could play an important role to activate the forest industry and increase the public benefit functions of forest, but more attention on their utilization is required and how they can be utilize more efficiently is the new task assigned to our forestry for sustainable forest management.

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Trend on Technology Development of Bioenergy from Woody Biomass (목질계 바이오매스를 이용한 바이오에너지 기술개발 동향)

  • Kwon, Gu-Joong;Kim, Nam-Hun
    • Journal of Forest and Environmental Science
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    • v.25 no.2
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    • pp.131-138
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    • 2009
  • Recently, various efforts for the extended utilization of woody biomass has been attempted due to the fact that global warming, energy and environmental problems are urgent ones to be solved. Development of new energy sources at our national security level is desperately needed as we depend on almost all of energies supplied from other countries, let alone the economic crisis caused by oil price hike. Woody biomass can be converted to energy by means of thermochemical, biological, or direct combustion processes. Many processes are available for producing bioenergy, such as bioethanol, wood pellet, wood chip, combined heat, and power system. Political support and R&D investment should be provided that can boost the utilization of the wood biomass, the eco-environment, and recyclable and alternative energy resources for national power security. In addition, a long-term strategy that can utilize unused and low efficient woody biomass resources, and systematically collect and manage them in a national level should be set up. Even though the possibility in total exchange of fossil oil with woody biomass is quite low, technology developments of woody biomass for the solution to global warming and environmental problem through its commercialization are expected to grow steadily.

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Prediction of Forest Biomass Resources and Harvesting Cost Using GIS (GIS를 이용한 산림 바이오매스 자원량 및 수확비용 예측)

  • Lee, Jin-A;Oh, Jae-Heun;Cha, Du-Song
    • Journal of Forest and Environmental Science
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    • v.29 no.1
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    • pp.81-89
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    • 2013
  • Nowadays, excessive using of fossil fuel contributes to global warming. Also, this phenomenon increases steadily. Therefore forest biomass from logging residues has received attention. The goal of this study was to determine the sustainability and economic feasibility of forest-biomass energy source. Accordingly, forest biomass resource was calculated, and harvesting and transporting machines which can be used in investing area were chosen, when using forest biomass as energy source. And then through these data, the harvesting cost was decided. The forest biomass resource calculated, thinned trees and logging residues, was 37,330.23 $m^3$ and 14,073.60 ton, respectively. When harvesting timber in each sub-compartment, the average thinned trees yield was 120.73 $m^3$, and tree logging residues was 402.80 ton. The use of tower yarder as harvesting and transporting equipments in study area was 85.4% and 66.7%, respectively, in up hill and down hill yarding. The average harvesting cost of biomass in the possibility area of timber yarding operation was expensive as 81,757 won/$m^3$, 85,434 won/m3 and 50,003 won/ton, respectively, in thinned trees and logging residue. If using data from this research analysis, tree could be felled by choosing sub-compartment.

Physical Properties of Matrix using Biomass Fly Ash an Industrial By-product (산업부산물인 바이오매스 플라이애시를 활용한 경화체의 물리적 특성)

  • Kim, Dae-Yeon;Cho, Eun-Seok;Lee, Sang-Soo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.21-22
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    • 2019
  • In order to prevent global warming according to fossil fuel use, countries around the world are making efforts through the Kyoto Protocol and the Paris Climate Change Convention. In addition, in order to prepare for high oil prices, researches such as the development of various renewable energy are being conducted. At present, the domestic production rate of energy sources in Korea is low at 18.1%, and power plants using forest biomass are being constructed to meet the domestic situation where 63% of the land is a forest. In 2015, the global production of wood pellets, a raw material for wood-based biomass power generation, was 28 million tons, up 7.7% from 2014, and has increased tenfold over the last decade. This is a result of increased demand for biomass. Korea is also increasing every year. However, biomass fly ash, an industrial by-product generated by biomass energy generation, is now being disposed of entirely, and there is little research to utilize it. Therefore, this paper will use biomass fly ash, an industrial by-product, which is currently being discarded due to a lack of separate treatment methods, as an admixture concept to contribute to solving environmental problems, developing new admixtures, improving quality, and seeking recycling plans.

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Biomass Changes of a Human-influenced Pine Forest and Forest Management in Agricultural Landscape System (인간간섭하의 소나무림의 현존량변화와 농촌경관시스템내에서의 산림관리)

  • Hong, Sun-Kee;Nobukazu Nakagoshi
    • The Korean Journal of Ecology
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    • v.19 no.4
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    • pp.305-320
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    • 1996
  • It is necessary to obtain information about the productivity of the human-influenced forest and to understand the consumption of biomass resources in secondary forest in order to examine the resource flux by human activity in rural landscape. Thus the aims of this study were to elucidate the biomass and their use of secondary Pinus densiflora forests and to discuss sustainable utilization of secondary forests in rural landscape system. This study was carried out in Yanghwa-ri, Kongjugun, Chungcheongnam-do, central Korea. The changes of growth rate and aboveground biomass of a pine forest for 2 years were analyzed to understand forest management regimes in rural pine forests. Through allometric equations deduced from 25 sample trees, biomass was estimated. The biomass increase of pine forest was approximately 16.36 t/ha/yr in the unexploited stand and 12.24 t/ha/yr in the exploited stand. These were nearly equal to those of natural pine forests in central Korea. This result proved that human-influenced pine forest in rural landscape as well as the natural one has high potentiality to provide forest products. Making graveyard in forest-land was the important disturbance and land-use which currently occurring in rural landscape in the study area. Finally, we presented some forest management for stutainable and positive uses of secondary forests as one of the local energy resources in terms of the holistic landscape-ecological view.

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Optimal Condition for Torrefaction of Eucalyptus by Response Surface Methodology (반응표면분석법을 이용한 유칼립투스의 반탄화 최적조건 탐색)

  • Kim, Young-Hun;Na, Byeong-Il;Lee, Soo-Min;Lee, Hyoung-Woo;Lee, Jae-Won
    • Journal of the Korean Wood Science and Technology
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    • v.41 no.6
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    • pp.497-506
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    • 2013
  • The optimal condition for the torrefaction of eucalyptus (Eucalyptus globulus) was investigated by response surface methodology. The carbon content in the torrefied biomass increased with the severity factor (SF), while hydrogen and oxygen contents decreased. The calorific value of torrefied biomass ranged from 20.23 to 21.29 MJ/kg, depending on the torrefaction conditions. This implied that the energy contained in the torrefied biomass increased by 1.6 to 6.9%, when compared with that of the untreated biomass. The weight loss of biomass increased as the SF increased. The Code level of reaction temperature had the highest impact on the energy yield of torrefied biomass, while the effect of Code level of reaction time was considerably low. The highest energy yield was obtained at low SF.

Analysis of Chemical Compositions and Energy Contents of Different Parts of Yellow Poplar for Development of Bioenergy Technology

  • Myeong, Soo-Jeong;Han, Sim-Hee;Shin, Soo-Jeong
    • Journal of Korean Society of Forest Science
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    • v.99 no.5
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    • pp.706-710
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    • 2010
  • Understanding of chemical composition and energy contents in tree is important to develope strategies of renewable energy policy to cope with climate change. Residual biomass as renewable energy source was evaluated and focused on the bark-containing branches. Chemical analysis studies were conducted for different part of yellow poplar (Liriodendron tulipifera), which were partitioned to inner bark, outer bark, small branches, medium branches, big branches and trunk. The variations in hydrophobic extractives, hydrophilic extractives, lignin, carbohydrate compositions, energy contents (higher heating value) and the ash content were determined. The inner and outer bark had higher ash content, hydrophobic and hydrophilic extractives content, and higher energy content than those of tree trunk. Polysaccharides content in inner and outer bark was quite lower than those of stem or branches. Based on the energy content of residual biomass, replacement of fossil fuel and greenhouse gas emission abatement were calculated.

Analysis on the Trend of the Utilization of Woody Biomass - Production, supply, and practical use of woody biomass - (목질 바이오매스의 활용에 대한 동향 분석 - 목질 바이오매스의 생산·공급, 그리고 활용을 중심으로 -)

  • Ahn, Byeong-Il;Kim, Chul-Hwan;Lee, Ji-Young;Shim, Sung-Woong;Jo, Hu-Seung;Lee, Gyeong-Sun;Lee, Jee-Young
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.44 no.4
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    • pp.32-42
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    • 2012
  • Wood biomass including forest residues, waste wood, and construction residuals has been widely generated in Korea, but forest biomass from the National Forest Management Operation Project plays a big role in generating wood biomass. Unfortunately the promotion policy of woody energy organized by the Forest Service in Korea concentrates more on demand creation rather than on supply expansion. Therefore, in order to utilize insufficient wood resources effectively, it is greatly required to develop uses for maximizing their added value. In particular, more attention to the use of the second generation biomass has been paid in foreign countries because there is a threshold that the first generation biomass cannot produce enough biofuel without threatening food supplies and biodiversity. In Korea, wood pellets are regarded as the alternative clean fuels to oils and coals that emit green house gases into the atmosphere. However, using wood as pellet raw materials can not be an economic way because the value of wood disappears right after burning in the boiler in spite of its contribution to the decrease of carbon emission. Differently from wood pellets, kraft pulping process using woody biomass produces black liquor as a by-product which can be used to generate electricity, bioenergy and biochemicals through gasification. Thus, it can be more economical to make a torrefaction of lignocellulosic biomass such as low-quality wood and agricultural leftovers as raw materials of pellets.