Question

Coke oven gas consists mainly of
A. ${{{H}}_{{2}}}$ and ${{C}}{{{H}}_{{4}}}$
B. ${{CO}}$ and ${{C}}{{{O}}_{{2}}}$
C. ${{{H}}_{{2}}}$ and ${{CO}}$
D. ${{C}}{{{H}}_{{4}}}$ and ${{CO}}$

Answer 1

Coke oven gas ${{C}}{{{O}}_{{{gas}}}}$ is a byproduct gas produced during the production of metallurgical coke in a byproduct coke oven battery, where metallurgical coal is carbonized by heating it in absence of air. During carbonization the volatile matter in the coal is vaporized and driven off. This volatile matter leaves the coke oven chambers as hot, raw coke oven gas. After leaving the coke oven chambers, the raw coke oven gas is cooled which results in a liquid condensate stream and a gas stream. These two streams are processed in the plant to recover byproduct coal chemicals and to condition the raw coke oven gas so that it can be used as a fuel gas.

Complete answer:
Coke oven gas is formed by heating coal to ${{1100^\circ C}}$ without access to air. The classic composition of coke gas: hydrogen $({{{H}}_{{2}}}){{ - 51\% }}$, methane $({{C}}{{{H}}_{{4}}}){{ - 34\% }}$, carbon monoxide $({{CO) - 10\% }}$, ethylene $({{{C}}_{{2}}}{{{H}}_{{4}}}){{ - 5\% }}$. The composition may also include benzene $({{{C}}_{{6}}}{{{H}}_{{6}}})$, ammonia $({{N}}{{{H}}_{{3}}})$, hydrogen sulfide $({{{H}}_{{2}}}{{S}})$ and other components.

Option “A” is correct as its chief components are ${{{H}}_{{2}}}$ and
${{C}}{{{H}}_{{4}}}$.

It also contains ${{CO}}$ and ${{C}}{{{O}}_{{2}}}$ and other gases.

Note:
The main emphasis of a modern byproduct plant is to treat the raw coke oven gas sufficiently so that it can be used as a clean, environmentally friendly fuel. Raw coke oven gas after treatment in the byproduct plant is called clean coke oven gas or simply coke oven gas.