A. Coking coals cannot be used
B. Low carbon conversion efficiency is achieved
C. Entrainment of solids is higher
D. Large quantity of coal can be processed
Related Mcqs:
- 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 - Lurgi coal gasifier is a pressurised _______________ bed reactor ?
A. Moving
B. Fixed
C. Fluidised
D. Entrained - Low temperature carbonisation of coal takes place at _______________ °C ?
A. 300
B. 1100
C. 700
D. 900 - The main product of high temperature carbonisation of coal is_____________________?
A. Coke
B. Ammonia
C. Tar
D. Phenol - The yield of tar from high temperature carbonisation of dry coal is about _______________ percent?
A. 3
B. 12
C. 22
D. 0.3 - Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because__________________?
A. Its calorific value is very less
B. Tar neutralises the residual acids present in pitch
C. It reduces viscosity and imparts fluidity for its transportation through pipelines at economic
pressure drop
D. All A, B. and C. - High temperature carbonisation of coal takes place at __________________ °C?
A. 2000
B. 700
C. 1100
D. < 500 - Coal tar is used as a___________________?
A. Binding material for coal briquettes
B. Fuel in rotary kiln
C. Binder in making carbon electrodes
D. All A , B. and C. - Ultimate analysis of coal determines its _______________________ content?
A. Carbon, hydrogen, nitrogen & sulphur
B. Carbon, ash, sulphur & nitrogen
C. Carbon, sulphur, volatile matter & ash
D. Carbon, volatile matter, ash & moisture - Carbon content of pitch (residue of coal tar distillation) is around ________________ percent?
A. 70
B. 55
C. 80
D. 94
