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首页> 外文期刊>International journal of green energy >A COMPARATIVE ANALYSIS OF STRAW UTILIZATION FOR BIOETHANOL AND BIOELECTRICITY AS VEHICLE POWER SOURCES IN CHINA
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A COMPARATIVE ANALYSIS OF STRAW UTILIZATION FOR BIOETHANOL AND BIOELECTRICITY AS VEHICLE POWER SOURCES IN CHINA

机译：秸秆利用量和生物电作为车辆动力资源的比较分析

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摘要

Bioethanol and bioelecricity are two main energy conversion processes for straw utilization. Considering the three stages to power a vehicle, namely, energy conversion, distribution, and utilization, a lifecycle comparative analysis was conducted on the two processes according to their energy efficiencies and environmental impacts in China, e.g., CO_2 and NO_x emissions and water consumption, In the base scenario, the net energy output of bioethanol was 1.95 km/kg dry biomass, which was 29.4% of that produced by the bioelectricity process. Comparing the environmental impacts of 1 kg dry biomass, the water consumption and CO_2 and NO_x emissions of bioelectricity were 21.3%, 14.9%, and S3 times higher than those of the bioethanol process, respectively. Using the I-km vehicle drive as the function unit, water consumption and CO_2 emission of bioelectricity were 53.5% and 58.9% lower than those of bioethanol, respectively, but NO_x emission was about 15 times higher than that of bioethanol. With the possible technology innovation for each process, differences in their energy efficiencies and environmental impacts are expected to be reduced. However, bioelectricity is still more advantageous in most respects except NO_x emission. Conclusions are that straw-based E85 substitution of fossil-dependent fuel should be further expected, especially considering the high water intensity of bioethanol processing and nationwide water scarcity in China. In addition, bioelectric technology improvements in energy conversion efficiency and de-nitrification efficiency should be given priority. Likewise, technology innovation in work performance and construction of supporting service systems for electric vehicles should be prioritized.
机译：生物乙醇和生物电性是秸秆利用的两个主要能量转化过程。考虑到为车辆提供动力的三个阶段，即能量转换，分配和利用，根据其在中国的能源效率和环境影响（例如，CO_2和NO_x排放量和水消耗量）对这两个过程进行了生命周期比较分析，在基本方案中，生物乙醇的净能量输出为1.95 km / kg干生物量，占生物电过程产生的净能量的29.4％。比较1 kg干生物质的环境影响，生物电耗水量，生物电的CO_2和NO_x排放量分别比生物乙醇工艺高21.3％，14.9％和S3倍。以I-km车辆驱动器为功能单位，生物电的耗水量和CO_2排放量分别比生物乙醇低53.5％和58.9％，但NO_x排放量比生物乙醇高约15倍。通过对每个过程进行可能的技术创新，可以减少它们在能源效率和环境影响方面的差异。但是，除了NO_x排放外，生物电在大多数方面仍更具优势。结论是，特别是考虑到生物乙醇加工的高水强度和全国范围内的水资源短缺，应该进一步期望以秸秆为基础的E85替代依赖化石燃料的燃料。此外，应优先考虑改进生物电技术的能量转换效率和反硝化效率。同样，应优先考虑工作绩效的技术创新和电动汽车配套服务系统的建设。

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  • 来源
    《International journal of green energy》 |2012年第8期|731-748|共18页
  • 作者

    Beibei Liu; Feng Wang; Yunze Wu; Kaihong Fang; Jun Bi;

  • 作者单位

    State Key Laboratory of Pollution Control & Resource Reuse, School of Environment, Nanjing University, Nanjing, China;

    State Key Laboratory of Pollution Control & Resource Reuse, School of Environment, Nanjing University, Nanjing, China;

    State Key Laboratory of Pollution Control & Resource Reuse, School of Environment, Nanjing University, Nanjing, China;

    State Key Laboratory of Pollution Control & Resource Reuse, School of Environment, Nanjing University, Nanjing, China;

    State Key Laboratory of Pollution Control & Resource Reuse, School of Environment, Nanjing University, Nanjing, China,School of Environment, Nanjing University, Nanjing 210046, China;

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  • 正文语种 eng
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  • 关键词

    bioelectricity; bioethanol; energy output; CO_2; water consumption;

    机译：生物电生物乙醇能量输出CO_2;耗水量;

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