Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-II-12INITIAL CONDITIONS OF NON-CATALYTIC PARTIAL METHANEOXIDATION PROCESS IN ADIABATIC REACTORAnasov A.S.Moscow State Academy of Fine Chemical Technologies named by M.V. Lomonosov, MoscowThere are some factors, which have an influence on kinetics conditions for hightemperaturemethane conversion. One of those is spontaneous combustion characterized byinduction period, which depends of process pressure and temperature of reagents. Noncatalyticpartial methane oxidation process is carried out in millisecond residence time. In thatcase conversion goes by in adiabatic conditions, and process temperature depends of reagentsinitial temperature and adiabatic heating of mixture. Different data of induction perioddependencies is given in literature. In [1] suggested carrying out the process with initialtemperature equal 400°С at pressure 1 MPa. In [2] process was investigated at pressure3 MPa, initial temperature of methane equal 350-450°С and initial temperature of O 2 equal120°C. Besides, there are some sources [3,4] suggested heating of reagents mixture up to500°C. To predict of spontaneous combustion it is necessary to create conditions withresidence time extremely less than induction period. The process parameters dependence ofreagents initial temperature was calculated in research work for optimal reagents ratio andpressure 5.0 MPa. Reported that rise of initial temperature provokes increase of adiabaticheating temperature, increase of CO content, decrease of CO 2 content and H 2 /CO ratio.Calculated optimal value of initial temperature equals 227°С, adiabatic heating temperatureequals 1313°С, СО 2 content is 4.8 % vol.References:1. Anisopyan А.А., Volod’ko N.P. Mechanism of methane conversion, 1962, V. 145, #. 1, P. 140- 143.2. Bodrov I.М., Apelbaum L.O., Kinetics of carbon dioxide methane conversion, Kinetics & catalysis, 1967,V. 8, #. 4, P. 379 - 384.3. Proc. Roy. Soc., 1936 A, v. 154, 95.4. J. Chem. Soc., 1937, 436.293