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首页> 外文期刊>Environmental Science & Technology >Biofuels That Cause Land-Use Change May Have Much Larger Non- GHG Air Quality Emissions Than Fossil Fuels
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Biofuels That Cause Land-Use Change May Have Much Larger Non- GHG Air Quality Emissions Than Fossil Fuels

机译：导致土地用途变化的生物燃料可能比化石燃料产生的非温室气体排放量大得多

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摘要

Although biofuels present an opportunity for renewable energy production, significant land-use change resulting from biofuels may contribute to negative environmental, economic, and social impacts. Here we examined non-GHG air pollution impacts from both indirect and direct land-use change caused by the anticipated expansion of Brazilian biofuels production. We synthesized information on fuel loading, combustion completeness, and emission factors, and developed a spatially explicit approach with uncertainty and sensitivity analyses to estimate air pollution emissions. The land-use change emissions, ranging from 6.7 to 26.4 Tg PM_(2.5), were dominated by deforestation burning practices associated with indirect land-use change. We also found Brazilian sugar cane ethanol and soybean biodiesel including direct and indirect land-use change effects have much larger life-cycle emissions than conventional fossil fuels for six regulated air pollutants. The emissions magnitude and uncertainty decrease with longer life-cycle integration periods. Results are conditional to the single LUC scenario employed here. After LUC uncertainty, the largest source of uncertainty in LUC emissions stems from the combustion completeness during deforestation. While current biofuels cropland burning policies in Brazil seek to reduce life-cycle emissions, these policies do not address the large emissions caused by indirect land-use change.
机译：尽管生物燃料为可再生能源的生产提供了机会，但生物燃料引起的土地用途的重大变化可能会给环境，经济和社会带来负面影响。在这里，我们研究了巴西生物燃料生产预期增长所造成的间接和直接土地利用变化对非GHG空气污染的影响。我们综合了有关燃料负载，燃烧完整性和排放因子的信息，并开发了具有不确定性和敏感性分析的空间显式方法，以估算空气污染排放。土地利用变化的排放量介于6.7至26.4 Tg PM_（2.5）之间，主要是与间接土地利用变化相关的毁林燃烧做法。我们还发现，巴西的甘蔗乙醇和大豆生物柴油（包括直接和间接的土地利用变化效应）与六种受控空气污染物的传统化石燃料相比，具有更大的生命周期排放。排放量的幅度和不确定性随着生命周期整合周期的延长而降低。结果取决于此处采用的单个LUC方案。在LUC不确定之后，LUC排放不确定性的最大来源是毁林期间的燃烧完整性。尽管巴西目前的生物燃料农田燃烧政策试图减少生命周期的排放，但这些政策并未解决由间接土地用途变化引起的大量排放。

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  • 来源
    《Environmental Science & Technology》 |2012年第19期|p.10835-10841|共7页
  • 作者

    C.-C. Tsao; J. E. Campbell; M. Mena-Carrasco; S. N. Spak; G. R. Carmichael; Y. Chen;

  • 作者单位

    School of Engineering, University of California, 5200 Lake Road, Merced, California 95343, United States;

    School of Engineering, University of California, 5200 Lake Road, Merced, California 95343, United States;

    Center for Sustainability Research, Universidad Andres Bello, Republica 440, Santiago, Chile;

    The Center for Global and Regional Environmental Research, University of Iowa, 424 IATL, Iowa City, Iowa 52242, United States;

    The Center for Global and Regional Environmental Research, University of Iowa, 424 IATL, Iowa City, Iowa 52242, United States;

    School of Engineering, University of California, 5200 Lake Road, Merced, California 95343, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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