Why analysis of coal is necessary?
Coal quality is important for proper functioning of a boiler. Heat generated from burning coal in a thermal energy boiler is used for power generation, generating steam, and a variety of other applications. The chemical composition of coal determines many characteristics of a boiler design.
What are the types of coal analysis?
Some of the Common Tests conducted on Coal include
- Calorific value(Gross/net)
- Proximate analysis- Moisture,Volatile matter, Ash and Fixed Carbon.
- Ultimate analysis – C,H, O, N, S and Ash.
- Ash analysis – Al2O3, SiO2, CaO, MgO,TiO2, Na2O, K2O, S etc.,
- Ash Fusion Temperature.
- Coke Reactivity.
- Hard-grove Grindability Index.
What are the two types of coal?
Types of coal
- Anthracite contains 86%–97% carbon and generally has the highest heating value of all ranks of coal. …
- Bituminous coal contains 45%–86% carbon. …
- Subbituminous coal typically contains 35%–45% carbon, and it has a lower heating value than bituminous coal.
What is the property of coal?
Result of chemical composition and physical characteristic (proximate, ultimate analysis and calorific value of coal and mangrove wood were as follow: coal from Kaltim Prima Coal were moisture: 16.11%, ash: 3.77%, volatile matter: 43.10%, fixed carbon: 37.01%, carbon content: 44.86%, sulfur content: 0.130% and …
How you can analysis the quality of coal?
Proximate Coal Analysis (Physical Testing) … Due to the fact that coal is typically used as fuel the calorific value is ideal to give a first impression of the product quality. For a first (“proximate”) analysis of coal, the calorific value, ash, moisture, and volatile content are measured.
What is the ultimate analysis of coal?
The ultimate analysis of coal involves determination of the weight percent carbon as well as sulfur, nitrogen, and oxygen (usually estimated by difference). Trace elements that occur in coal are typically included as a part of the ultimate analysis.
What are the 4 grades of coal?
The four ranks are:
- 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 are the three types of coal analysis?
Palynology: identifies fossil spores and pollens in coal and shale for correlation and reconstruction of original coal-forming mires. Petrographic analysis: examines microscopic components of coal. Proximate analysis: determines moisture, volatile matter, ash yield, and fixed carbon content in coal.