The first step in the Ostwald process (used to produce nitric acid) is the forma

Question

The first step in the Ostwald process (used to produce nitric acid) is the formation of nitric oxide from ammonia and oxygen.

1. What is the stoichiometric reactant ratio? (mol NH3 needed to react with 1 mol of O2)

2. How many moles of NO are formed from the reaction of 1 mol NH3?

mol NO

3. If the feed going to the reactor contains 0.530 mol NH3/mol O2, what is the limiting reactant, and the percent excess of the other reactant?

4. What mass flow rate of NH3 is required to produce 1190 lbm of NO per day? (Assume that the reactor runs 24 hours a day.)

lbm NH3 / hr

Explanation / Answer

1) 4/5

2) 1 mol

3) mol NH3/mol O2 = 0.530
moles of NH3 = 0.530 * moles of O2
so limiting reagent is NH3
4/5 moles of NH3/moles of O2 .......... 5 moles of O2
0.53 moles of NH3/moles of O2 .......?
= 3.3125 moles of O2

4) 453 kg

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