Propane is dehydrogenated to from propylene in a catalytic reactor: C3H8 → C3H6 + H2 The process is to be designed for a 95% overall conversion of propane. The reaction products are separated into two streams: the first, which contains H2, C3H6, and 0.555% of the propane that leaves the reactor, is taken off as product; the second stream, which contains the balance of the unreacted propane and 5% of the propylene in the product stream, is recycled to the reactor. Calculate the composition of the product, the ratio (moles recycled)/(moles fresh feed), and the single-pass conversion.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Propane is dehydrogenated to from propylene in a catalytic reactor: C3H8 → C3H6 + H2
The process is to be designed for a 95% overall conversion of propane. The reaction products are separated into two streams: the first, which contains H2, C3H6, and 0.555% of the propane that leaves the reactor, is taken off as product; the second stream, which contains the balance of the unreacted propane and 5% of the propylene in the product stream, is recycled to the reactor. Calculate the composition of the product, the ratio (moles recycled)/(moles fresh feed), and the single-pass conversion.
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