Adsorption-enhanced steam-methane reforming with intraparticle-diffusion limitations

摘要: Abstract The adsorption-enhanced reaction (AER) process is theoretically analyzed for hydrogen production by steam-methane reforming (SMR). It uses a fixed-bed packed column of an admixture SMR catalyst and adsorbent selective removal CO2 from the zone. A mathematical model taking into account multicomponent (six species) mass balances, overall balance, Ergun relation pressure drop, energy balance bed-volume element including heat-transfer to wall, nonlinear adsorption equilibrium isotherm coupled with three main reactions was derived describe AER intraparticle-diffusion limitations. numerical solution equations this obtained using method orthogonal collocation. validity prediction checked comparing simulated results experimental data literature. mechanism studied analysis profiles bed concentrations, temperature, velocity, pressure, rates. limitations on are evaluated effectiveness factors. effect operating conditions (reaction length adsorptive reactor) purity, productivity methane conversion simulation; high purity product gas (90–98%) as prime impurity traces (below 400 ppm) CO 30 ppm) can be produced directly reactor under 450–490 °C 222.9–891.4 kPa.