Kinetics of the Reactions of Hydroxyl Radicals with Furan and Its Alkylated Derivatives 2-Methyl Furan and 2,5-Dimethyl Furan.

Furans are promising second generation biofuels with comparable energy densities to conventional fossil fuels. Combustion of furans is initiated and controlled to a large part by reactions with OH radicals, the kinetics of which are critical to understand the processes occurring under conditions relevant to low-temperature combustion. The reactions of OH radicals with furan (OH + F, R1), 2-methyl furan (OH + 2-MF, R2), and 2,5-dimethyl furan (OH + 2,5-DMF, R3) have been studied in this work over the temperature range 294-668 K at pressures between 5 mbar and 10 bar using laser flash photolysis coupled with laser-induced fluorescence (LIF) spectroscopy to generate and monitor OH radicals under pseudo-first-order conditions.

Temperature and Pressure Dependent Kinetics of QOOH Decomposition and Reaction with O: Experimental and Theoretical Investigations of QOOH Radicals Derived from Cl + (CH)COOH.

QOOH radicals are key species in autoignition, produced by internal isomerizations of RO radicals, and are central to chain branching reactions in low-temperature combustion. The kinetics of QOOH radical decomposition and reaction with O have been determined as a function of temperature and pressure, using observations of OH radical production and decay following H-atom abstraction from -butyl hydroperoxide ((CH)COOH) by Cl atoms to produce QOOH (CH(CH)COOH) radicals. The kinetics of QOOH decomposition have been investigated as a function of temperature (251-298 K) and pressure (10-350 Torr) in helium and nitrogen bath gases, and those of the reaction between QOOH and O have been investigated as a function of temperature (251-304 K) and pressure (10-100 Torr) in He and N.