Which of the following impurities is commonly found in Coal Oven Gas (COG) and must be removed before its use?
-
A.
Helium (He)
-
B.
Ammonia (NH3)
-
C.
Oxygen (O2)
-
D.
Argon (Ar)
Correct Answer:
B. Ammonia (NH3)
Explanation:
Ammonia (NH3) is a significant contaminant in raw coal oven gas (COG) that must be removed prior to use to prevent pipeline corrosion and the formation of harmful nitrogen compounds during combustion. While COG primarily consists of beneficial gases like hydrogen and methane, it also contains pollutants such as tar, naphthalene, hydrogen sulfide, and ammonia. In industrial processing, ammonia is typically eliminated by scrubbing the gas with water or acidic solutions. This purification step is essential for protecting downstream equipment and ensuring the gas meets environmental safety standards. Since Helium, Oxygen, and Argon are not primary impurities requiring removal in this context, Ammonia is the correct choice.
Click below to open Discussion & Feedback
0 Issues
Please
login to comment or Report Issues.