CE 212 Lecture Notes - Lecture 4: Chemical Reactor, Boiling Point, Hexane
19 Apr 2018
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It is impossible to have 100g fe (in) = 200g of fe (out) At the beginning we have a sloppy mixture in a vessel which gradually takes in heat and undergoes chemical reactions to give eventually a solid which is the cake. Likewise in a batch chemical reactor, the materials are mixed together and react (thus changing the chemical composition) with time. In a batch distillation, the amount of material remaining in the still changes with time. In addition, the chemical composition of the distillate changes, with the more volatile materials being prevalent at the beginning, the less volatile near the end. As a result the boiling point of the mixture and the condensing temperature of the distillate also change with time: a semi-batch reactor is where one reagent is put in, and another fed in continuously. Over time, with variables staying constant, this is a continuous; steady process.
