期刊
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
卷 17, 期 4, 页码 775-785出版社
WILEY
DOI: 10.1002/bbb.2502
关键词
co-processing; carbon-14; mass balance; low carbon fuels standard; low carbon intensity fuels
Policies like LCFS have encouraged refineries to lower carbon intensity. Determining renewable content and carbon intensities of co-processed fuels is challenging. A combination of direct and indirect methods, such as carbon 14 and modified mass balance, can provide representative values.
Policies such as a low carbon fuel standard (LCFS) have incentivized oil refineries to lower the carbon intensity of their operations and the fuels they produce. Although an increasing number of refineries are co-processing biogenic feedstocks, determining the renewable content and carbon intensities of the co-processed fuels (and potential credits earned through policies such as a LCFS) has proven to be challenging. Various methods that might be used to track the green molecules and determine the carbon intensities of co-processed fuels were compared. Although the use of carbon 14 and mass balance have predominated, each of these methods has some advantages and disadvantages. To try to benefit from the strengths of each method, a combined direct (C14) and indirect (modified mass balance) approach was shown to give representative values. However, the quality and frequency of the information collected needs to be assured, as it can improve the quality of data needed to determine the carbon intensity of the final fuels.
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