Is high volatile matter in coal Good?
High-volatile matter may also be associated with spontaneous combustion, especially in low-rank coals (Fierro and others, 1999). Hence, knowledge of volatile matter is important for safety, handling, and transporting coal. Find more information about this analysis at KGS Laboratory Services.
What is high volatile coal?
High-volatile bituminous coals (high volatile B and C) are classified using gross calorific (heating) value. High volatile bituminous C coals have calorific values of 11,500 to 13,000 Btu/lb. High volatile bituminous B coals have calorific values of 13,000 to 14,000 Btu/lb.
What is the significance of volatile matter in coal?
High volatile matter in the fuel is undesirable as it produces more tar, causing problems to the internal combustion engine. Volatile matter in the fuel determines the design of the gasifier and layout of the gas cooling and cleaning system for elimination of tar content.
Which coal has highest volatile matter?
Anthracite
Anthracite.
Is low volatile matter in coal Good?
Low volatile coals are capable of replacing more coke due to their high carbon content and calorific value.
Which is best quality of coal?
Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter.
How does volatile matter affect combustion?
After the volatiles are released out, the combustion occurs because the temperature is higher than the ignition temperature of combustible components in volatile. The combustion leads to the increase of char temperature and char starts to burn.
What are the characteristics of a good quality coal?
Good burning characteristics – Complete combustion without agitation. Good grindability – sometimes it is needed to grind coal before burning. Good coal should not cause high abrasion on the machine. High ash softening temperature – High Ash softening temperature lower the risk of slagging.
What are the 3 different types of coal?
What are the types of coal?
- Anthracite: The highest rank of coal.
- Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite.
- Subbituminous: Subbituminous coal is black in color and is mainly dull (not shiny).
What is best quality coal?
Anthracite is the best quality of coal which carries 80 to 95 per cent carbon content. It ignites slowly with a blue flame. It has the highest calorific value.