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

Fuels and Combustion
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

None of these

Higher methane content and thus higher calorific value

Lower carbon dioxide content

Higher carbon monoxide content

None of these

Higher methane content and thus higher calorific value

Lower carbon dioxide content

Higher carbon monoxide content

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Fuels and Combustion
Quantity of coke produced from metallurgical coal may be around __________ percent.

30

75

50

95

30

75

50

95

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Fuels and Combustion
Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

It reduces its calorific value tremendously

The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot

There are chances of explosion during preheating

It reduces its flame temperature tremendously

It reduces its calorific value tremendously

The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot

There are chances of explosion during preheating

It reduces its flame temperature tremendously

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Fuels and Combustion
The weathering index of a coal

Is related to its calorific value

Is a measure of its caking tendency

Is a measure of its size stability, when stored & exposed to weather

Gives an idea of the fusion temperature of ash

Is related to its calorific value

Is a measure of its caking tendency

Is a measure of its size stability, when stored & exposed to weather

Gives an idea of the fusion temperature of ash

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Fuels and Combustion
Which of the following is unsuitable fuel for producer gas manufacture?

Coal having high fusion point of its ash

Coke

Coal having low fusion point of its ash

Anthracite

Coal having high fusion point of its ash

Coke

Coal having low fusion point of its ash

Anthracite

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Fuels and Combustion
Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.

0.87

2.4

11.4

1.75

0.87

2.4

11.4

1.75

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Fuels and Combustion

Fuels and Combustion 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

Fuels and Combustion Quantity of coke produced from metallurgical coal may be around __________ percent.

Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

Fuels and Combustion The weathering index of a coal

Fuels and Combustion Which of the following is unsuitable fuel for producer gas manufacture?

Fuels and Combustion Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.

Fuels and Combustion
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

Fuels and Combustion
Quantity of coke produced from metallurgical coal may be around __________ percent.

Fuels and Combustion
Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

Fuels and Combustion
The weathering index of a coal

Fuels and Combustion
Which of the following is unsuitable fuel for producer gas manufacture?

Fuels and Combustion
Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.