A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having _____________________?

Related Mcqs:

1. Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces __________________?

   A. Higher amount of methane
   B. Lower amount of hydrogen
   C. Both A. and B.
   D. Higher amount of both methane and hydrogen

2. Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an ______________ bed gasifier?

   A. Entrained
   B. Moving
   C. Fixed
   D. Fluidised

3. Gas yield in the Kopper-Totzek coal gasifier is about ______________ Nm3/ton coal (ash = 35%)?

   A. 150
   B. 1500
   C. 3500
   D. 5000

4. Kopper-Totzek coal gasifier_________________?

   A. Can give ammonia synthesis gas (H2 + N2)
   B. Is a moving bed reactor
   C. Cannot use coking coal
   D. Operate at very high pressure

5. Lurgi coal gasifier is a pressurised ______________ bed reactor?

   A. Moving
   B. Fixed
   C. Fluidised
   D. Entrained

6. A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon _________________?

   A. Is less liable to spontaneous combustion on storage
   B. Is more difficult to ignite and produces a shorter flame
   C. Requires smaller combustion space and less secondary air
   D. None of these

7. 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

8. Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around _____________ atm?

   A. 3-5
   B. 25-30
   C. 60-65
   D. 95-100

9. Which of the following coal gasification processes will produce gas having maximum methane content ?

   A. Winkler process
   B. Lurgi process
   C. Kopper-Totzek process
   D. All can produce same methane content

10. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

    A. 71%
    C. In between 37 & 71%
    D. None of these