Chemical Engineering - Fuels and Combustion

1. 

Blast furnace coke is made from coal by

A. low temperature carbonisation.
B. high temperature carbonisation.
C. medium temperature carbonisation.
D. heating the coal in an oven in presence of air.

Answer: Option B

Explanation:

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2. 

Yield of blast furnace gas is about __________ Nm3 /ton of pig iron.

A. 300
B. 2000
C. 5000
D. 10000

Answer: Option B

Explanation:

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3. 

Coke oven gas is stripped of its H2S and mercaptans content by

A. absorption in wash oil.
B. adsorption on bog iron bed.
C. bubbling it through dilute sulphuric acid.
D. adsorption on silica gel.

Answer: Option B

Explanation:

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4. 

In Lurgi coal gasifier,

A. coking coals cannot be used.
B. low carbon conversion efficiency is achieved.
C. entrainment of solids is higher.
D. larger quantity of coal can be processed.

Answer: Option D

Explanation:

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5. 

Mineral matter content (M) and ash content (A) in coal are approximately related as

A. M = 1.1A
B. M = A
C. M = 1.5A
D. M = 2A

Answer: Option A

Explanation:

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