1. Which of these forms of sulphur is present in coal?
2. Why Fluidized bed reactor gives relatively higher efficiency
3. Net energy efficiency and HHV of Ultra- supercritical boiler are:
4. In chemical looping combustion: At what elevated temperature (around …. to ….0C) Metal reacts with the oxygen in the air in an exothermic reaction producing Metal oxide?
5. Syngas can be used for various applications including liquid fuels (diesel and gasoline) produced through_______.
6. Syngas conversion efficiency of thermal power plant is between …. % and …. % for a single cycle steam power plant.
7. Syngas conversion efficiency of a Combined Cycle Gas Turbine (CCGT) power plant may be:
8. Which statement is not true about advantages of gasification?
9. Which catalyst is used in CTSL process?
10. A low grade coal is combusted in a fixed bed reactor. The composition of flue gas (dry basis) emitting from it is as follows: 15.3% CO2, 4.1% O2, and the rest is nitrogen. From these data, calculate the percentage excess air used in this process
- FeS2
- Organic Sulphur
- Sphalerite (ZnS), galena (PbS), and marcasite
- All of these
2. Why Fluidized bed reactor gives relatively higher efficiency
- It provides more contact between coal particles and air
- Recycling of unburnt coal is possible which increases conversion
- Both (a) and (b)
- None of these
3. Net energy efficiency and HHV of Ultra- supercritical boiler are:
- 42% and 8,126 Btu/kWh
- 44% and 7,757 Btu/kWh
- 37% and 9,300 Btu/kWh
- None of these
4. In chemical looping combustion: At what elevated temperature (around …. to ….0C) Metal reacts with the oxygen in the air in an exothermic reaction producing Metal oxide?
- 100 and 200
- 200 and 300
- 400 and 600
- 700 and 900
5. Syngas can be used for various applications including liquid fuels (diesel and gasoline) produced through_______.
- Fischer-Tropsch synthesis
- Reinluft process
- Both (a) and (b)
- None of these
6. Syngas conversion efficiency of thermal power plant is between …. % and …. % for a single cycle steam power plant.
- 10 and 20
- 20 and 30
- 30 and 40
- 40 and 50
7. Syngas conversion efficiency of a Combined Cycle Gas Turbine (CCGT) power plant may be:
- Up to 50%
- Up to 60%
- Up to 70%
- Up to 80%
8. Which statement is not true about advantages of gasification?
- Reduced CO2 emissions
- Accurate combustion control
- High thermal efficiency
- None of these
9. Which catalyst is used in CTSL process?
- Silver
- Zeolite
- Vanadium oxide on silica
- Nickel molybdenum on alumina
10. A low grade coal is combusted in a fixed bed reactor. The composition of flue gas (dry basis) emitting from it is as follows: 15.3% CO2, 4.1% O2, and the rest is nitrogen. From these data, calculate the percentage excess air used in this process
- 23.67 %
- 11.08 %
- 33.54 %
- 46.42 %