in the manufacture of ammonia by habers process, write flow chart ,chemical reaction and conditions involved?
Answers
In the manufacture of ammonia by Haber's process, the flow chart is as shown.
The chemical equation is N
2
+3H
2
⇌2NH
3
The optimum conditions are temperature=700 K and Pressure=200 atm.
Ammonia is manufactured by the direct combination of nitrogen and hydrogen in the ratio 1:3 by volume. Reaction: N2 + 3H2(g) ⇌ 2NH3(g); ΔH = -46 kJ/mol According to Le-Chatelier’s principle, high yield of Ammonia is obtained under the following favourable conditions. (a) High pressure of 200atm (b) Temperature of ~ 700K (c) Use of Iron oxide as Catalyst in presence of small amounts of K2O and Al2O3 as promoters. Procedure; Step-1: Dry N2 and H2 in the ratio 1:3 compressed at 200 atm in compresser. Step-2: Compressed gas passed through catalytical chamber, in presence of Fe, catalytical promoter Mo and 700 K forms ammonia. Step-3: The ammonia formed is cooled in coolent below 239 K. Step-4: The unreacted nitrogen and hydrogen are recirculated to compressor using pump
