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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 5
11.
A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having
higher methane content and thus higher calorific value.
higher carbon monoxide content.
lower carbon dioxide content.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Combustion of pulverised fuel
requires larger combustion chamber than rich gaseous fuel.
in a metallurgical furnace does not contaminate the product in the furnace by ash from fuel.
suppresses the discharge of fine dust and grit into atmosphere
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
400-500
900-1000
1400-1500
1700-1800
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Low temperature oxidation of coal during storage does not decrease its
oxygen content
caking power
calorific value
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
With increase in the oxygen content of the coal, its __________ decreases.
calorific value
caking power
both (a) & (b)
neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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