Fuel Technology — Is Coke Oven Gas Produced by Burning Coke? Judge the statement: “Coke oven gas is obtained by burning coke in an oven.” Indicate whether this is correct or incorrect and recall the actual source of coke oven gas.

Introduction / Context:
Coke oven gas is an important by-product fuel in iron and steel plants. Knowing how it is produced helps distinguish it from producer gas or blast furnace gas and prevents misconceptions about its composition and calorific value.

Given Data / Assumptions:

• Industrial coke production from coking (destructive distillation) of coal in absence of air.
• By-products: coke, tar, ammonia liquor, benzol, and coke oven gas.
• Controlled heating without combustion within sealed ovens.

Concept / Approach:
In a coke oven, coal is heated in the absence of air to drive off volatile matter. The evolved gases and vapors, after cooling and cleaning, constitute coke oven gas (rich in H2, CH4, CO, and other light hydrocarbons). It is not generated by burning coke; combustion would consume fuel rather than produce this gas stream.

Step-by-Step Solution:
Identify the industrial operation: destructive distillation (carbonization) of coal.Recognize the gaseous by-product: coke oven gas.Conclude the statement is incorrect because the gas is not created by burning coke.

Verification / Alternative check:
Plant flow diagrams show raw gas leaving ovens to by-product recovery units; combustion occurs in separate heating flues, not within the charge space.

Why Other Options Are Wrong:
“Agree” confuses production (by coking coal) with utilization (burning the gas or coke elsewhere).

Common Pitfalls:
Mixing up different industrial gases: producer gas (air blown over hot coke), water gas (steam over hot coke), and coke oven gas (from coal carbonization).

Final Answer:
Disagree