Entropy generation minimization for CO2 hydrogenation to light olefins

摘要: Abstract An optimization model is established for the reaction process of CO2 hydrogenation to light olefins in a fixed-bed tubular reactor based on finite time thermodynamics or entropy generation minimization theory. In present study, specific rate (entropy averaged by production target product) proposed as an objective function and optimal design parameters which minimize have been investigated. The developed reversible kenetic models their cooresponding kinetic parameters, are obtained fitting experimental data. irreversibilities due heat transfer, chemical reactions viscous flow considered local each term calculated according irreversible thermodynamics. analyses performance characteristics conducted well. results show that accords with two-step mechanism, Fischer-Tropsch rate-controlling step. irreversibility mainly located front reactor, most contributions caused reactions. reductions up 24.78% 10.04% can be achieved inner diameter catalyst bed density, respectively.