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首页> 外文期刊>Environmental Science & Technology >Determination of Biodiesel Blending Percentages Using Natural Abundance Radiocarbon Analysis: Testing the Accuracy of Retail Biodiesel Blends
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Determination of Biodiesel Blending Percentages Using Natural Abundance Radiocarbon Analysis: Testing the Accuracy of Retail Biodiesel Blends

机译：使用自然丰度放射性碳分析确定生物柴油混合百分比：测试零售生物柴油混合的准确性

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摘要

Blends of biodiesel and petrodiesel are being used increasingly worldwide. Due to several factors, inaccurate blending of these two mixtures can occur. To test the accuracy of biodiesel blending, we developed and validated a radiocarbon-based method and then analyzed a variety of retail biodiesel blends. Error propagation analysis demonstrated that this method calculates absolute blend content with ± 1% accuracy, even when real-world variability in the component biodiesel and petrodiesel sources is taken into account. We independently confirmed this accuracy using known endmembers and prepared mixtures. This is the only published method that directly quantifies the carbon of recent biological origin in biodiesel blends. Consequently, it robustly handles realistic chemical variability in biological source materials and provides unequivocal apportionment of renewable versus nonrenewable carbon in a sample fuel blend. Analysis of retail biodiesel blends acquired in 2006 in the United States revealed that inaccurate blending happens frequently. Only one out of ten retail samples passed the specifications that the United States Department of Defense requires for blends that are 20% biodiesel (v/v; referred to as B20).
机译：全球范围内越来越多地使用生物柴油和石油柴油的混合物。由于多种因素，这两种混合物可能会混合不正确。为了测试生物柴油混合的准确性，我们开发并验证了一种基于放射性碳的方法，然后分析了多种零售生物柴油混合。误差传播分析表明，即使考虑到成分生物柴油和石油柴油来源的实际变化，该方法也能以±1％的准确度计算绝对混合物含量。我们使用已知的端基和制备好的混合物独立地确认了这种准确性。这是唯一直接量化生物柴油混合物中最新生物来源碳的方法。因此，它可以稳健地处理生物原料中实际的化学变异性，并提供样品燃料混合物中可再生碳与不可再生碳的明确分配。对2006年在美国购买的零售生物柴油混合物的分析表明，不正确的混合物经常发生。十分之一的零售样本中，只有一项通过了美国国防部对20％生物柴油（v / v；称为B20）的混合物的要求。

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