• Title/Summary/Keyword: biofuels

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Status and Challenging Issues of the Advanced Biofuels (차세대 바이오연료의 R&D 현황과 이슈)

  • Park, Soonchul;Lee, Jinsuk
    • New & Renewable Energy
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    • v.10 no.4
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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.

Recent Developments and Future Prospects on Biofuels R&D

  • Lee, Jin-Suk;Park, Soon-Chul
    • Journal of Plant Biotechnology
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    • v.34 no.2
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    • pp.95-101
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    • 2007
  • The transport biofuel is emerging a promising option to realize the sustainable growth of our society. Two biofuels, bioethanol and biodiesel, are currently used in the transport sector. As the production of biofuels is getting activated, the stable supply of the feedstocks is becoming a critical issue. Active works have been carried out to secure the stable supply of the raw materials for the production of biofuels. One approach is the breeding of the energy crops to get higher productivity and / or the desirable fuel properties. The other approach is finding new energy crops which may not be used for edible purpose. First current aspects and challenging issues for the implementation of biofuels have been introduced. Finally the recent works and future prospects on the development of the energy crops are summarized.

Study on Comparison of Global Biofuels Mandates Policy in Transport Sector (해외 주요국 수송용 바이오연료의 혼합의무 정책비교 분석 연구)

  • Kim, Jae-Kon;Yim, Eui-Soon;Jung, Choong-Sub
    • New & Renewable Energy
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    • v.7 no.4
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    • pp.18-29
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    • 2011
  • Biofuls are considered as an option to reduce greenhouse gases emission, increase energy supply diversity and security of supply, as well as an opportunity for job creation and rural development. First of all, biofuls technologies have been promoted as a means for reducing the carbon intensity of the transport sector. Hence, in the last decade biofuels production has been driven by governmental policies. The key instruments widely adopted to foster production and increase consumption have been mandatory blending targets, tax exemptions and sibsidies. As one of the most powerful instruments, biofuel mandates require fuel producers to produce a pre-defined amount (or share) of biofuels and blend them with petroleum fuel. National biofuels mandates are in place 35 countries and partially in place in 6 countries. In this study, we reviewed status of global biofuels policies to reduce greenhouse gases in the European Union, United States and other countires worldwide. Especially, we discussed representative biofuels mandates policies same as Renewable Fuel Standard (RFS, US), Renewable Transport Fules Obligation (RTFO, UK) in transport sector.

Study on Review Sustainability Criteria and Key Approaches for Biofuel (바이오연료의 지속가능성 기준 적용 사례분석 고찰 연구)

  • Kim, Jae-Kon;Yim, Eui-Soon;Jung, Choong-Sub
    • New & Renewable Energy
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    • v.9 no.1
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    • pp.33-43
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    • 2013
  • The objective of this paper is to provide a review on the latest development on the main initiative and approaches for the sustainability criteria for biofuels. A large number of national and international initiative lately experienced rapid development in the review of the biofuels targets announced in the European Union (EU), United States (US) and other countries worldwide. The global biofuel targets are likely to have a strong impact on land use and agricultural markets. Although biofuels production provides new options for using agricultural crops, there are environmental, social and economic concerns associated with biofuel production. The diversity of feedstock, large number of biofuels pathway an their complexity lead to a high uncertainty over the greenhouse gas (GHG) performances of biofuels, in terms of GHG emission reductions compared to the fossil fuels, expecially if land use change is involved. This paper describes an overview of current status of ongoing certification initiative in Europe and worldwide for biofuels sustainability. It also provides mandatory requirements as part of an sustainability scheme in EU, United Kingdom, US and international approaches and should be reviewed to introduce based on global trends in Korea.

Effect Study of Fuel Specifications on Biofuels Policy in Transport Sector (수송용 바이오연료 정책에 따른 품질기준 영향에 관한 연구)

  • Park, Jo-Yong;Kim, Jae-Kon;Min, Kyong-IL;Park, Cheon-kyu;Ha, Jong-Han
    • Journal of the Korean Applied Science and Technology
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    • v.32 no.4
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    • pp.767-780
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    • 2015
  • Transport biofuels produced from biomass can be substituted for petroleum fuels due to GHG reduction, sustainability and environmental friendly. Mandates and targets of biofuels are announced in the European union, United states and other countries worldwide and promoted by the government policies. This paper reviewed current status of the national biofuels policies and fuel specifications in transport sector. EU biofuels policy shifted and GHG emission reduction became the main focus of the policy. There are specification requirements for biofuels in the U.S. under the RFS2, but there are other polices as well that serve to promote the uptake of biofuels both at the federal and state level. Korea government has allowed 2.3% oxygen in gasoline to come from oxygenates, increased the biodiesel blend mandate from B2 to B2.5 effective from Jul. 31, 2015.

Study on Comparison of Nenewable Fuel Standard Policy on Global (해외 신재생연료 의무혼합제도 비교분석 연구)

  • Lim, Eui Soon;Kim, Jae-Kon;Jung, Choong-Sub
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.11a
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    • pp.150.1-150.1
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    • 2011
  • The global rise of greenhouse gas(GHG) emissions and its potentially devastating consequences require a comprehensive regulatory framework for reducing emissions, including those from the transport sector. alternative fuels and technologies have been promoted as a means for reducing the carbon intensity of the transport sector. Renewable fuel policies were historically motivated by energy security concerns, and to promoted agricultural industries. In the last decade, biofuels have also been discussed as low or net-zero carbon soures of energy for transportation. Hence, the development of biofuels has been supported by a range of policy instruments, including volumetric targets or blending mandates, tax incentives or penalties, preferential government purchasing, government funded research, development in world-wide. As one of the most powerfuel instruments, renewable fuel mandates require fuel producers to produce a pre-defined amount(or share) of biofuels and blend them with petroleum fuel. In this study, we reviewed Renewable Fuel Standard(RFS, USA), Renewable Transport Fules Obligation (RTFO, UK) as a renewable fuel mandate policy to reduce GHG. This includes not only mandate system for blending of biofuels in transport fuels, but also sustainability to use biofuels in this system.

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Exhaust emissions of a diesel engine using ethanol-in-palm oil/diesel microemulsion-based biofuels

  • Charoensaeng, Ampira;Khaodhiar, Sutha;Sabatini, David A.;Arpornpong, Noulkamol
    • Environmental Engineering Research
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    • v.23 no.3
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    • pp.242-249
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    • 2018
  • The use of palm oil and diesel blended with ethanol, known as a microemulsion biofuel, is gaining attention as an attractive renewable fuel for engines that may serve as a replacement for fossil-based fuels. The microemulsion biofuels can be formulated from the mixture of palm oil and diesel as the oil phase; ethanol as the polar phase; methyl oleate as the surfactant; alkanols as the cosurfactants. This study investigates the influence of the three cosurfactants on fuel consumption and exhaust gas emissions in a direct-injection (DI) diesel engine. The microemulsion biofuels along with neat diesel fuel, palm oil-diesel blends, and biodiesel-diesel blends were tested in a DI diesel engine at two engine loads without engine modification. The formulated microemulsion biofuels increased fuel consumption and gradually reduced the nitrogen oxides ($NO_x$) emissions and exhaust gas temperature; however, there was no significant difference in their carbon monoxide (CO) emissions when compared to those of diesel. Varying the carbon chain length of the cosurfactant demonstrated that the octanol-microemulsion fuel emitted lower CO and $NO_x$ emissions than the butanol- and decanol-microemulsion fuels. Thus, the microemulsion biofuels demonstrated competitive advantages as potential fuels for diesel engines because they reduced exhaust emissions.

A Review of Biofuels Production Technologies from Microalgae (미세조류 유래 바이오연료 생산 기술에 관한 고찰)

  • PARK, JOYONG;KIM, JAE-KON;PARK, CHEUNKYU
    • Transactions of the Korean hydrogen and new energy society
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    • v.27 no.4
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    • pp.386-403
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    • 2016
  • Biofuels produced from biomass can be substituted for petroleum fuels due to GHG reduction, sustainability and environmental friendly. The process technologies that convert biomass into biofuels are varied and depend on the feedstocks. Microalgae are considered to be one of the most promising alternative source to the conventional feedstocks for biofuel. Microalgae can be converted to biodiesel, bioethanol, biogas and biojet fuel via thermolchemical and biochemical production technologies. This reviews discusses recent advance in understanding the effects of the characteristics of various processes on the production of biofuels using microalgae. The performances of microalgae based biofuel are compared.

Production of Biofuels and Biochemicals by Biorefinery (바이오리파이너리를 이용한 바이오연료 및 바이오화합물의 생산)

  • LEE, CHAE-YOUNG;HAN, SUN-KEE
    • Transactions of the Korean hydrogen and new energy society
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    • v.27 no.6
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    • pp.702-711
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    • 2016
  • The authors reviewed information about biorefining of biomass by using academic information databases. Feedstocks were classified into triglycerides biomass, sugar biomass, starchy biomass, lignocellulosic biomass, and organic waste biomass. Biorefinery is an integrated system converting biomass into biofuels and biochemicals by various physical, chemical, biological, and thermochemical technologies. This paper presented a comprehensive summaries of opportunities, recent trends and challenges of biorefinery. A brief overview of promising building blocks, their sources from biomass, and their derivatives were also provided. In conclusion, this paper demonstrated the feasibility of biorefinery producing biofuels and biochemicals from biomass.

Long-chain alcohols derived from the microalga Monoraphidium

  • Yang, Xuewei;Dai, Xin;Zhang, Rui;Shao, Cong;Geng, Shu;Chen, Guangyi;Liu, Xianhua;Wang, Guangyi
    • Advances in Energy Research
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    • v.1 no.2
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    • pp.107-116
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    • 2013
  • This study was to investigate the composition and characteristics of long-chained alcohols extracted from the algal strain Monoraphidium 3s35. The production of biomass was optimized using different cultivation methods. Under the aerated growth condition, this strain yielded up to 37.26% extracts of dry weight and $576mgL^{-1}$ biomass. The major compounds of the extracts are mainly long-chained alcohols (89.24%), with carbon chain length ranging from 12 to 20. Interestingly, or the long-chained alcohols, 3-(2-Methoxyethyl)-1-nonanol, 3,7,11,15-Tetramethyl-2-hexadecen-1-ol and oleyl alcohol accounted for 53.68%, 23.45%, and 12.11%, respectively. Because of their amphipathic nature, these long-chained alcohols have been widely used in bioenergy production and cosmetics industry. Furthermore, Monoraphidium 3s35 produced 9.73% of $C_{17}$ and $C_{20}$ alkanes, which can be used as an important supplement for the petrodiesel-like fuel.