Molecular Properties of Fatty Acid Mixtures Estimated by Online Time-Domain NMR

An approach based on time-domain nuclear magnetic resonance (TD-NMR) enables the estimation of the molecular properties of fatty acid mixtureskinematic viscosity (mu), heating value (), cetane number (CN), and carbon chain length (CL). In this approach, the H-1 NMR spin-spin relaxation rates R-2 or times T-2 were used to determine these molecular properties. Online monitoring of the mu, , CN, and CL of fatty acid mixtures was performed using an online TD-NMR system that had been modified for flowing samples. The presented results show the potential of TD-NMR for online quality control during the production of liquid fuels.