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Ch8 (i clicker Question: 2) Which of the reactor conditions would you choose to optimize selectivity to D in a PBR for the following reaction network? D a = 1 EA1 = 20 kcal/mol A U a = 2 EA2 = 16 kcal/mol Reaction order a = 1 for rxn 1, a = 2 for rxn 2 Note that A D is a slightly endothermic, reversible process. 2 A) Feed pure A at high temperature; keep space time long. B) Feed diluted A at high temperature; keep space time short. C) Feed pure A at low temperature; keep space time short. D) Feed diluted A at low temperature; keep space time long