Abstract
The Hybrid Chemistry (HyChem) approach is applied to model the combustion chemistry of Gevo’s alcohol-to-jet (ATJ) fuel, a conventional Jet A fuel, and their blends. The focus of the current study is on the foundational fuel chemistry submodel in the HyChem approach. Specifically, the newly developed Foundational Fuel Chemistry Model 2 (FFCM-2) is used as the base model for describing the high-temperature pyrolysis and oxidation kinetics of hydrogen, carbon monoxide, formaldehyde, and C1-4 hydrocarbons. Key issues addressed and resolved include difficulties of a previous kinetic model in accurately predicting the pyrolysis kinetics and combustion properties of iso-butene, which is the key intermediate in the combustion of the ATJ fuel. Additionally, we show that FFCM-2, being fully assessed for its kinetic uncertainty, enables us to quantify the uncertainties of the HyChem models of both real fuels.
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