What is the difference between gas-phase ammonia oxidation and liquid-phase ammonia oxidation? ?
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Could some expert tell me what the differences are between gas-phase ammonia oxidation and liquid-phase ammonia oxidation processes? ? In the one-step synthesis of p-toluenecyanide from p-xylene via amination, is the gas-phase method better or the liquid-phase method? Thank you so much!
Ammonia has a low boiling point, so the reaction pressure is low in the gas-phase method; liquid ammonia is vaporized and then fed into the reactor. In the liquid-phase method, however, liquid ammonia enters the reactor under pressure, such that it does not vaporize at this pressure level. Although the reactor pressure in the liquid-phase method is high, posing certain difficulties, the liquid-phase method facilitates the shift of the reactant equilibrium toward the products, allowing for higher conversion rates; therefore, it is recommended to use this method.
Gas-phase reactions are superior; the gas-phase method is also used in large-scale industrial production nowadays, as it ensures good mixing and results in higher product quality. The operation steps are simple