Question

Ammonia present in the coke oven gas is removed by washing with

• A. Caustic solution
• B. Dilute HCl
• C. Dilute ammoniacal liquor
• D. Ethanolamine

Hint:

Coke oven gas cleaning includes removal of impurities such as ammonia, tar, and sulphur compounds.

Answer 1

The Correct Option is C

Coke oven gas contains several impurities. One of the important impurities is ammonia: \[ NH_3 \] Before further use, ammonia is removed from coke oven gas. According to the given answer key, ammonia present in coke oven gas is removed by washing with: \[ \text{dilute ammoniacal liquor} \] Washing helps absorb ammonia from the gas stream. Caustic solution is generally used for acidic gases. Ethanolamine is commonly used for acid gas removal such as \(CO_2\) and \(H_2S\). Therefore, the correct answer is: \[ \text{Dilute ammoniacal liquor} \]