**Reversible Reaction in an Adiabatic Plug Flow Reactor**

A reversible reaction, A ↔ B, takes place in an adiabatic plug-flow reactor (PFR). Select either an exothermic (ΔH < 0) or an endothermic (ΔH > 0) reaction. The black curve is the equilibrium conversion as a function of temperature from the van't Hoff equation. The blue line is conversion as a function of temperature from the adiabatic energy balance. The intersection of the curve and the line is the conversion at equilibrium (X_{e})and the adiabatic temperature at equilibrium (T_{e}). You can vary the feed temperature and the molar ratio of inert to reactant in the feed.
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DetailsFor the reversible reaction A ↔ B with both reactant A and inert component I in the adiabatic PFR feed, the equilibrium constant is: where K _{m} is the equilibrium constant at temperature T_{m} (K), ΔH is the heat of reaction (J/mol), R is the ideal gas constant (J/[mol K]), and T is the temperature of the reaction (K).The equilibrium conversion is obtained from the equilibrium constant, assuming ideal gases: where X _{E} is the equilibrium conversion, X_{EB} is the conversion calculated from the energy balance, α is the ratio in the feed of total mols/mols of reactant, c_{P} is the heat capacity (J/[mol K]) of both the reactant and inert, and T_{f} is the feed temperature (K). |