Intrinsic kinetics for rapid decomposition of methane in an aerosol flow reactor

摘要

A one-dimensional nonisothermal model is developed for the high-temperature rapid dissociation of methane in a fluid-wall graphite aerosol flow reactor. Intrinsic reaction kinetics are identified through simulation of the model and comparison to experimental results. The dissociation rate can be described by dX/dt=6 ×10~11 exp(-2500/T)(1-X)~4.4 s~-1 over the temperature range 1533＜T＜2144 K and residence time range 0.9＜t＜1.5 s. This rate expression is useful for describing high-temperature short residence time processes for producing hydrogen and carbon black by methane decomposition (CH_4→C+2H_2).