Chemical Engineering - Fuels and Combustion
Exercise :: Fuels and Combustion - Section 6
| 1. |
Coals used for the generation of producer gas should have |
| A. |
high caking index. | | B. |
low fusion point of ash. | | C. |
high volatile matter content. | | D. |
very low ash content (8-10%). |
Answer: Option C
Explanation:
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| 2. |
A coal having higher volatile matter content will necessarily have lower |
| A. |
ash fusion temperature. | | B. |
calorific value. | | C. |
ignition temperature. | | D. |
caking index. |
Answer: Option C
Explanation:
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| 3. |
Pick out the wrong statement. |
| A. |
Percentage of ash in coke produced from medium coking coal is more than that in coal. | | B. |
The calorific value (kcal/Nm3) of coke oven gas reduces on removal of hydrogen from it by cryogenic method. | | C. |
Ash is normally removed as 'flyash' in kopper-Totzek process of coal gasification. | | D. |
Coal based fertiliser plants in India at Talcher (Orissa) and Ramagundam (A.P) employ Kopper-Totzek process of coal gasification. |
Answer: Option C
Explanation:
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| 4. |
Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent. |
Answer: Option B
Explanation:
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| 5. |
With increases in carbonisation temperature |
| A. |
coke even gas yield increases. | | B. |
tar yield increases. | | C. |
hydrogen percentage in the coke oven gas decreases. | | D. |
methane percentage in the coke oven gas increases. |
Answer: Option A
Explanation:
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