CHEN 3102 Lecture 48: 2015_4_1 Lecture.pdf
4 Apr 2015
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Autothermal operation: utilization of heat generated from exothermic rxn to operate at desired t ex: combustion, flame, burner you have fuel that"s going in @ room t and it"s heated by the rxn. @ steady state, generation term is balanced with all other terms to maintain trxn (whatever temperature we want to achieve) -> we can calculate space time rxn: a --> b r = kca. What is fa, and tout? solution: mass balance: this = eqn 1. Any heat generated by the rxn has to be carried out by the exiting liquid calling this eqn 2 solve eqns 1 and 2 iteratively answer: fa = 0. 705. Check if there"s supposed to be a negative sign here. @ low t, numerator dominates, q is proportional to exponential. @ high t, exponential terms cancel explain this morei didn"t understand. Now we need to look at the other terms. So far, we only looked @ heat generated term.
