Tracking Renewable Carbon in Bio-Oil/Crude Co-Processing with VGO through 13C/12C Ratio Analysis
Biomass-derived pyrolosis oil (aka. Bio-oil) contains high oxygen and other heteroatoms that prevent it from being directly used as a conventional fuel due to its thermal instability, non-volatility and corrosivity. Co-processing the bio-oil with vacuum gas oil (VGO, a petroleum refining feedstock) leverages the existing petroleum refining infrastructure which significantly reduces Capex for the bio-oil pathway. Increasing renewable carbon incorporation into conventional fuels is a critical step in biofuels development and adoption. To take advantage of this approach, a fast, economic and accurate method with a potenial online monitoring capability is needed for tracking the renewable carbon through processing and then using the information to guide optimization of the co-processing parameters to maximize renewable carbon incorporation in fuel products. Here, we have developed a high-precision analytical protocol that enables accurate 13C/12C ratio analysis for bio-oil/crude samples. Our study demonstrates that high-precision 13C/12C ratio analysis can be a viable way to track renewable carbon incorporation in bio-oil co-processing products including the feedstock derived from C3 plants and guide the optimization of the co-processing parameters. Comparison of d13C with radiocarbon (14C) results obtained by an accelerator mass spectrometer (AMS) reveals a significant correlation (R2 = 0.998) and confirms d13C applicability for tracking renewable carbon in co-processing systems. Because C4 plant-derived bio-oils (-13‰) possesess more distinct d13C values than C3 plant-derived bio-oils (-26‰) relative to VGO (~-30‰), the use of C4 plant-derived feedstock will greatly increase the renewable C traceability through 13C/12C ratio analysis in bio-oil co-processing.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1677491
- Report Number(s):
- NREL/JA-5100-78096; MainId:32005; UUID:c567c4b6-8f3d-42da-aba4-c9ffc3a258cc; MainAdminID:18696
- Journal Information:
- Fuel, Journal Name: Fuel Vol. 275
- Country of Publication:
- United States
- Language:
- English
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