title: Investigation on minimum ignition energy of mixtures of α-pinene-benzene/air.
abstract: Minimum ignition energies (MIE) of α-pinene-benzene/air mixtures at a given temperature for different equivalence ratios and fuel proportions are experimented in this paper. We used a cylindrical chamber of combustion using a nanosecond pulse at 1,064 nm from a Q-switched Nd:YAG laser. Laser-induced spark ignitions were studied for two molar proportions of α-pinene/benzene mixtures, respectively 20-80% and 50-50%. The effect of the equivalence ratio (Φ) has been investigated for 0.7, 0.9, 1.1 and 1.5 and ignition of fuel/air mixtures has been experimented for two different incident laser energies: 25 and 33 mJ. This study aims at observing the influence of different α-pinene/benzene proportions on the flammability of the mixture to have further knowledge of the potential of biogenic volatile organic compounds (BVOCs) and smoke mixtures to influence forest fires, especially in the case of the accelerating forest fire phenomenon (AFF). Results of ignition probability and energy absorption are based on 400 laser shots for each studied fuel proportions. MIE results as functions of equivalence ratio compared to data of pure α-pinene and pure benzene demonstrate that the presence of benzene in α-pinene-air mixture tends to increase ignition probability and reduce MIE without depending strongly on the α-pinene/benzene proportion.
authors.affiliation: Institut P', UPR 3346 CNRS, ENSMA, Université de Poitiers, F-86961 Chasseneuil, France; INSA-CVL, PRISME, Univ. Orléans, EA 4229, F-18020 Bourges, France. Electronic address: bruno.coudour@ensma.fr.
authors.forename: B
authors.initials: B
authors.lastname: Coudour
authors.affiliation: INSA-CVL, PRISME, Univ. Orléans, EA 4229, F-18020 Bourges, France.
authors.forename: K
authors.initials: K
authors.lastname: Chetehouna
authors.affiliation: PRISME, INSA-CVL, Univ. Orléans, EA 4229, F-18020 Bourges, France.
authors.forename: S
authors.initials: S
authors.lastname: Rudz
authors.affiliation: PRISME, INSA-CVL, Univ. Orléans, EA 4229, F-18020 Bourges, France.
authors.forename: P
authors.initials: P
authors.lastname: Gillard
authors.affiliation: Institut P', UPR 3346 CNRS, ENSMA, Université de Poitiers, F-86961 Chasseneuil, France.
authors.forename: J P
authors.initials: JP
authors.lastname: Garo
mesh_terms: D000388:Air / Q000032:analysis*; D000393:Air Pollutants / Q000737:chemistry; D001554:Benzene / Q000737:chemistry*; D000081008:Bicyclic Monoterpenes; D005390:Fires; D039821:Monoterpenes / Q000737:chemistry*; D013696:Temperature; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D000081008:Bicyclic Monoterpenes; D039821:Monoterpenes; D055549:Volatile Organic Compounds; D001554:Benzene; C005451:alpha-pinene
keywords: Accelerating forest fires; Benzene; Laser-induced spark ignition; MIE; α-Pinene