Inhibition of hydrogen–oxygen flames by iron pentacarbonyl at atmospheric pressure

Mechanism of Iron Oxide Formation from Iron Pentacarbonyl‐Doped Low‐Pressure Hydrogen/Oxygen Flames

“…The FeOOH branch is drawn in the path diagrams, but excluded from the final reduced mechanism. Reactions involving FeH were also excluded, which agrees with the measurements by Gerasimov et al , who could not detect these two species in their measurements. All reactions of the reduced mechanism and the corresponding Arrhenius coefficients are listed in Table .…”

“…Interestingly, opposite effects on the ignition propensity were reported by Linteris and Babushok in particular for lean H 2 /air flames. Recently, Gerasimov et al investigated the inhibition of Fe(CO) 5 ‐doped H 2 /O 2 flames at atmospheric pressure experimentally and by numerical simulation. They measured concentration profiles of Fe, FeO 2 , FeOH, and Fe(OH) 2 probing molecular beam mass spectrometry and found a good agreement with modeling results based on the reaction mechanism provided by Rumminger et al .…”

Chemical Transformations in Inhibited Flames over Range of Stoichiometry

“…A significant progress in understanding the features of the inhibition chemistry under lean and rich conditions was made by measuring and simulating the H 2 /air flame speed over a wide range of equivalence ratios (Fig. 21) (Gerasimov et al, 2011). Furthermore, Gerasimov et al (Gerasimov et al, 2011) performed unique measurements of the spatial variation of concentration of some of Fe(CO) 5 destruction products (Fe, FeO 2 , FeOH, and Fe(OH) 2 ) in premixed atmospheric-pressure H 2 /O 2 /N 2 flame using probing molecular beam mass spectrometry with soft ionization by electron impact.…”

“…21) (Gerasimov et al, 2011). Furthermore, Gerasimov et al (Gerasimov et al, 2011) performed unique measurements of the spatial variation of concentration of some of Fe(CO) 5 destruction products (Fe, FeO 2 , FeOH, and Fe(OH) 2 ) in premixed atmospheric-pressure H 2 /O 2 /N 2 flame using probing molecular beam mass spectrometry with soft ionization by electron impact. A comparison between experimental and numerical results revealed that the mechanism used in the study (Rumminger et al, 1999) satisfactorily predicts speeds of atmospheric-pressure H 2 /air flames over a wide range of equivalence ratios and concentration profiles FeO 2 and Fe(OH) 2 in the flame.…”

Direct comparison of the flame inhibition efficiency of transition metals using metallocenes

“…Transition metals exhibit a wide range of oxidation states, thereby enabling these materials to scavenge radicals present in the chain reactions within flames, and this implies that transition metal compounds should exhibit highly efficient fireextinguishing capabilities [1][2][3][4]. Among the various transition metal compounds, it is well known that iron pentacarbonyl (Fe(CO) 5 ) is a good flame inhibitor [5,6] and thus this chemical has been proposed as an alternative to the halons. Fe(CO) 5 , however, is highly toxic [7] and this seriously limits its application as a fire extinguishing agent.…”