CONVERSION METHANE TO C_2 HYDROCARBONS VIA COLD PLASMA REACTION

摘要

Direct conversion of methane to C_2 hydrocarbons via cold plasma reaction with catalysts has been studied in the temperature range 297K to 373K and atmospheric pressure. Methane can be converted into C_2 hydrocarbons in different selectivity depending on the form of the reactor, power of plasma, flow of methane, ratio of N_2/CH_4 (mol) and nature of catalysts. The selectivity of C_2 hydrocarbons can be as high as 98.64%. Conversions of methane as high as 60% have been realized. The yield of C_2 hydrocarbons can be achieved 50%. Coking can be minimized by choice of proper catalysts, appropriate high flow of inlet methane and right ratio of N_2/CH_4 (mol). The catalyst surface providing sites for radicals combination and transfer excess energy of part of intermediate resultant. The reaction models of power function type have been abstained: -r_A=90.99exp(-26980/RT)C_A~(0.226)(mol/m~3.s).