Acetylene combustion rate

Laser induced fluorescence is particularly well suited to combustion chemistry, as a sensitive "in-situ" probe for free radicals in flames or under more controlled conditions in laboratory flash photolysis, discharge flow tube, or shock tube experiments. Using laser-saturation fluorescence previous studies from this laboratory (J ) have shown that C2(a3n ) is present in high concentrations in the hot region of an oxy-acetylene flame. C2(a-,n and X1 ) reacts with 0 .(2,3 4) One of the products of this reaction (and/or the reaction of C2H+02) is CC0.(2) In the present study, we report C20()rn.-f, i 7 fluorescence excitation spectra, A"3 , lifetimes and quenching rate constants, and... 

As a very essential requirement, there shall be absolutely no internal source of release of a combustible gas, vapour, mist or liquid. Even small volumes of gases with low LEL values (see Table 1.1 in Section 1.2), e.g. acetylene or benzene, can form an explosive mixture (with air) with a volume exceeding the volume of release by a factor 101 to 102 (as an order of magnitude). So, one mole of acetylene (=26g) can form a volume of more than 1 m3 explosive atmosphere. Or, as a second example a high voltage oil-blast circuit breaker with 200 MVA rated breaking capacity generates 70-80 litres... 

The vinoxy CH2CHO and 1-methylvinoxy (acetonyl) radicals are key intermediates in the mechanisms of many reactions of importance for atmospheric and combustion chemistry. The formation of vinoxy radicals has been observed in several chemical processes. They may be formed in reactions of OH radicals with ethylene oxide (C2H4O) and with acetylene (C2H2) in the presence of 02.8 They are also produced in reactions of 0(3P) atoms with alkenes and in the reactions of reactive atoms such as F or 0(3P) with acetaldehyde.164,165 The 1-methylvinoxy (acetonyl) radical CH2C(CH3)0 is considered an important intermediate in the atmospheric oxidation of acetone initiated by the OH radical.166171 Spectroscopic studies by Washida et al.164 and Williams et al.m allow estimation of the rate constant for the reaction of acetonyl with 02. 

In this paper we present a new technique for the synthesis of carbon film with carbynoid structures. The basis of the method described here consists of a combustion reaction between oxygen and acetylene and particular parameters for flame conditions. The flame volume can be considered as the reaction chamber as in conventional chemical vapor deposition (CvD) or physical vapor deposition (PVD) methods. This technique provides a method of synthesizing carbyne at high growth rates and of obtaining better crystals. 

Measurements of the velocity and position of detonation of acetylene, hydrogen, and pentane with oxygen, nitrogen, argon, and carbon dioxide mixtures at initial pressures up to 6 atmospheres were also made.107 The presence of antiknock compounds was found not to atfect the position of detonation. Lead tetramethyl delayed the rate of combustion of pentane, however.lli8,48... 

MERCURIC NITRATE (10045-94-0) A powerful oxidizer. Violent reaction with reducing agents, combustibles, phosphinic acid, hypophosphoric acid, petroleum hydrocarbons. Forms heat- and/or shock-sensitive compounds with acetylene (forms mercury acetylide), ethanol (forms mercury fulminate), ferrocene, isobutene, phosphine, potassium cyanide, sulfur. Incompatible with strong acids, acetic anhydride, ammonia, ammonium hexacyanofer-rate(II), organic azides, citric acid, hydrazinium perchlorate, isopropyl chlorocarbonate, nitrosyl perchlorate, sodium thiosulfate, sulfamic acid, thiocyanates, hydrozoic acid, methyl isocyanoacetate, sodium peroxyborate, trinitrobenzoic acid, urea nitrate. Aqueous solution corrodes metals. 

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