• Title/Summary/Keyword: carbon-reduction

Search Result 2,320, Processing Time 0.031 seconds

Korean Application Plans for International Carbon Markets by Coping with the Paris Agreement (Post-2020 파리협정 대응 한국의 국제탄소시장 활용방안)

  • Lho, Sangwhan
    • Journal of Climate Change Research
    • /
    • v.9 no.1
    • /
    • pp.91-102
    • /
    • 2018
  • The Korean government submitted the Intended Nationally Determined Contributions (INDC) to UNFCCC which aims to reduce 37% greenhouse gas emission for the opportunity of developing new energy industry and industry innovation by 2030 compared with Business-As-Usual scenario taking into account its international responsibilities and hosting headquarters of Green Climate Fund (GCF) secretariat. The 37% reduction is composed of 25.7% in the domestic markets and 11.3% in the international carbon markets. To achieve the reduction target in the international carbon market mechanisms, it must use the linkage of international carbon markets and develop new renewable energy technology for CDM and ODA. Finally, it must improve carbon capture storage (CCS) technology and establish domestic CCS institutional systems as soon as possible. And, it must activate CCS information exchange for the international cooperation on UNFCCC movement.

Development of Boron Doped Carbon Using CO2 Reduction with NaBH4 for Vanadium Redox Flow Battery (수소화 붕소 나트륨 (NaBH4) 과 이산화탄소의 환원을 이용한 바나듐 레독스 흐름전지용 탄소 촉매 개발)

  • Han, Manho;Kim, Hansung
    • Journal of the Korean Electrochemical Society
    • /
    • v.21 no.1
    • /
    • pp.1-5
    • /
    • 2018
  • In this study, boron - doped carbon was prepared by reducing carbon dioxide ($CO_2$) at high temperature by using sodium borohydride ($NaBH_4$). The boron - doped carbon was coated on carbon felt and applied as an electrode for a vanadium redox battery cell. As a result of electrochemical performance evaluation, reversibility of carbon felt coated with boron doped carbon compared to pure carbon felt was improved by about 20% and charge transfer resistance was reduced by 60%. In the charge / discharge results, energy density and energy efficiency were improved by 21% and 12.4%, respectively. These results show that carbon produced by reduction of $CO_2$ can be used as electrode material for redox flow battery.

A Study on Carbon Reduction Effect in On-site Improvement Type Residential Regeneration (현지개량형 주거지 재생의 탄소저감 효과 분석)

  • Kim, Young-Hwan;Park, Sang-Jun
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.14 no.3
    • /
    • pp.1495-1501
    • /
    • 2013
  • This study aims to figure out the effectiveness of low-carbon oriented residential regeneration by on-site improvement method. For this, we examined some technical planning elements for carbon reduction and selected standard criteria of computation on energy use-based amount of carbon emission through previous literature review and case studies. Next, based on this, we compared and analyzed three types of carbon emission in the designated renewal area in Cheongju City. The three types of carbon emission were the existing development, the redevelopment of apartment by overall removal, and the development of low-carbon oriented residential regeneration by on-site improvement method. Finally, we examined proper way to reduce carbon emission in low-carbon oriented residential regeneration.

Study on Geostatistical Method for an Effectiveness Analysis on Carbon Reduction Policy - Focusing on the Carbon Point System (탄소저감정책 효과분석을 위한 공간통계기법 적용방안 연구 - 탄소포인트제도를 대상으로 -)

  • Hwang, Hae-Seong;Joo, Yong-Jin;Koh, June-Hwan
    • Spatial Information Research
    • /
    • v.20 no.1
    • /
    • pp.71-80
    • /
    • 2012
  • Carbon Point system is Climate Change Action Program by providing incentives in proportion to voluntary reduction of energy consumption such as electricity, gas and water for houses, commercial facilities. So far, existing researches have been limited to construction of GHG(Green House Gas) Inventory and have little attention to empirical impact analysis on carbon reduction policy regarding the residential section. Therefore, this paper is intended to provide convincing findings of impact analysis on carbon reduction, revolving around the carbon point system. For this, we firstly calculated the carbon emission by using electricity and gas usage data in household targeting to Seongbuk-Gu. Carrying out IPA and spatio-temporal analysis. Then, we are capable of visualizing spatial patterns from 2007 to 2009 as a macro analysis. Following that, we explored the effect on carbon point system through Ex ante-Ex post Analysis by paired t-test. To conclude, we can spatially identify the distribution with a significant difference between carbon emissions according to energy use as a micro analysis by Hot Spot to Analysis on point entities. It is to be hoped that this method will be utilized to establish various policies and to evaluate the effect of reduction of GHG.

Effect of Microstructure and Cold Reduction Ratio on Spheroidization Rate and Mechanical Properties of High Carbon Steel (고탄소강 열연판재의 미세조직과 냉간압하율에 따른 구상화 속도 및 기계적 특성)

  • Lee, K.D.;Lee, S.Y.;Ha, T.K.;Jeong, H.T.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2008.10a
    • /
    • pp.382-385
    • /
    • 2008
  • In the present study, the effect of cold reduction ratio on the spheroidization rate of SK85 high carbon steel sheet was investigated. High carbon steel sheet fabricated by POSCO was soaked at $850^{\circ}C$ for 2 hr in a box furnace and then treated at $570^{\circ}C$ and $670^{\circ}C$ for 10 min in a salt bath furnace followed by water quenching to obtain a fine pearlite structure and coarse pearlite structure. Cold rolling was conducted on the sheets by reduction ratios of 20, 30, and 40 % and heat treatment for spheroidization was carried out at $720^{\circ}C$ for the various time intervals from 1 to 32 hrs. Area fraction of spheroidized cementite was measured with an image analyzer as a function of cold reduction ratios and duration times.

  • PDF

Electrochemical Reduction of Perchlorate Ion on Porous Carbon Electrodes Deposited with Iron Nanoparticles (영가철 나노 입자가 전착된 다공성 탄소전극을 이용한 과염소산 이온의 전기화학적 환원)

  • Rhee, Insook;Kim, Eun Yong;Lee, Bokyoung;Paeng, Ki-Jung
    • Journal of the Korean Electrochemical Society
    • /
    • v.18 no.2
    • /
    • pp.81-85
    • /
    • 2015
  • A method for degradation of the perchlorate anion ($ClO{_4}^-$) has been studied using electrochemically generated zero-valent iron (ZVI) deposited on a porous carbon electrode. The first strategy of this study is to produce the ZVI via the electrochemical reduction of iron (II) on a porous carbon electrode coated with a conducting polymer, instead of employing expensive $NaBH_4$. The present method produced well distributed ZVI on conducting polymer (polypyrrole thin film) and increased surface area. ZVI surface can be regenerated easily for successive reduction. The second strategy is to apply a mild reducing condition (-0.3 V) to enhance the efficiency of the degradation of perchlorate with ZVI without the evolution of hydrogen. The electrochemically generated ZVI nanoparticles may offer an alternative means for the complete destruction perchlorate without evolution of hydrogen in water with high efficiency and at low cost.

The Effect of Energy-Saving Investment on Reduction of Greenhouse Gas Emissions (에너지절약투자의 온실가스 배출 감소 효과)

  • Kim, Hyeon;Jeong, Kyeong-Soo
    • Environmental and Resource Economics Review
    • /
    • v.9 no.5
    • /
    • pp.925-945
    • /
    • 2000
  • This paper analyses the impact of energy-saving investment on Greenhouse gas emissions using a model of energy demand in Korea. SUR method was employed to estimate the demand equation. The econometric estimates provide information about the energy price divisia index, sector income, and energy saving-investment elasticities of energy demand. Except for energy price divisia, the elasticities of each variable are statistically significant. Also, the price and substitution elasticities of each energy price are similar to the results reported by the previous studies. The energy-saving investment is statistically significant and elasticities of each sector is inelastic. Using the coefficient of energy-saving investment and carbon transmission coefficient, the amount of reduction of energy demand and the reduction of carbon emissions can be estimated. The simulation is performed with the scenario that the energy-saving investment increase by 10~50%, keeping up with Equipment Investment Plan of 30% increase in energy-saving investment by 2000. The results show that the reduction of energy demand measured as 11.2% based upon 1995's level of the energy demand, in industrial sector. Accordingly, the carbon emissions will be reduced by 11.3% based upon 1995's level of the carbon emissions in industrial sector.

  • PDF

Reduction Characteristics of Electromagnetic Fields in Cavity by Lossy Dielectric Materials (손실 유전체를 이용한 공동 내부의 전자계 저감 특성)

  • 정광현;김기채
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.14 no.9
    • /
    • pp.950-954
    • /
    • 2003
  • This paper presents the delivered power and reflection coefficient in metallic shielding enclosure excited by the interior source, which are evaluated with the method of moments, and describes a method for reducing the radiation of electromagnetic fields in the cavity by putting lossy dielectric material in one inside wall. In this paper we introduce carbon polystyrene-foam as lossy dielectric material and observe it's effects of reduction when the thickness and permittivity of lossy dielectric material are changed. The results show that the reduction of the electromagnetic radiation can be achieved by controlling the amount of carbon in lossy dielectric material. The theoretical analysis is verified by the measured delivered power.

A Study on Analysis and Assessment of the LCCO2 Emissions for Building Construction by Using the Life Cycle Assessment Methodology (전과정평가 방법론을 이용한 건물의 전과정 탄소 배출량 평가 및 분석에 관한 연구)

  • Cho, Su-Hyun
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2016.05a
    • /
    • pp.259-260
    • /
    • 2016
  • Recently, world-wide focusing on the interest for the reduction of greenhouse gas emissions associated with climate change and global warming, South Korea also has set up a national greenhouse gas reduction target and action plans seeking to achieve them. In particular, in the construction area, to encourage green building certification of the building and carbon labeling acquisition of building products, in order to reduce the environmental impact caused by the industrial activities have been in steady efforts. Therefore, this study estimates the life cycle carbon footprint of building construction materials applied to carbon emissions reduction technology and analyzes the results. Through the CO2 emissions analysis in construction phase and maintenance phase of the building, it provides basic resource for future research expansion and establishes a step-by-step whole life cycle carbon emissions reduction plan in new construction and existing buildings.

  • PDF

Carbothermal Reduction of Oxide Powder Prepared from Waste WC/Co Hardmetal by Solid Carbon (WC/Co 초경 스크랩 산화물의 고체탄소에 의한 환원/침탄)

  • Lee Gil-Geun;Ha Gook-Hyun
    • Journal of Powder Materials
    • /
    • v.12 no.2 s.49
    • /
    • pp.112-116
    • /
    • 2005
  • In the present study, the focus is on the analysis of carbothermal reduction of oxide powder prepared from waste WC/Co hardmetal by solid carbon under a stream of argon for the recycling of the WC/Co hard-metal. The oxide powder was prepared by the combination of the oxidation and crushing processes using the waste $WC-8 wt.\%Co$ hardmetal as the raw material. This oxide powder was mixed with carbon black, and then this mixture was carbothermally reduced under a flowing argon atmosphere. The changes in the phase structure and gases discharge of the mixture during carbothermal reduction was analysed using XRD and gas analyzer. The oxide powder prepared from waste $WC-8wt.\%Co$ hardmetal has a mixture of $WO_{3} and CoWO_{4}$. This oxide powder reduced at about $850^{\circ}C$, formed tungsten carbides at about $950^{\circ}C$, and then fully transformed to a mixed state of tungsten carbide (WC) and cobalt at about $1100^{\circ}C$ by solid carbon under a stream of argon. The WC/Co composite powder synthesized at $1000^{\circ}C$ for 6 hours from oxide powder of waste $WC-8wt.\%Co$ hardmetal has an average particle size of $0.3 {\mu}m$.