There are two methods to analyze coal which are called proximate analysis and ultimate analysis. The proximate analysis determines only the fixed carbon, volatile matter, moisture and ash percentages and it can be determined with a simple apparatus.
What are the 4 types of coal explain?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.
What are the different types of coal Class 10?
Hint: There are four different types of coal. They are peat, lignite, bituminous coal and anthracite.
What is proximate analysis of coal?
Proximate analysis is formally defined by a group of ASTM3 test methods and is an assay of the moisture, volatile matter, fixed carbon, and ash content of a coal sample. … The moisture content is determined by the mass loss that a coal sample undergoes after it has been heated to 110 °C under a N2 atmosphere.
What are characteristics of coal?
Coal is a black, inhomogeneous, organic fuel, formed largely from partially decomposed and metamorphosed plant materials. Formation has occurred over long time periods, often under high pressures of overburden and at elevated temperatures.
Which coal is best quality?
Which country has the best quality coal?
Experts told Fact Check that Australia’s coal is on average high quality as a result of its low moisture and ash content, and high carbon content, compared with other countries, particularly Indonesia, the largest coal exporter in the world.
What is the major use of coal?
Coal is primarily used as fuel to generate electric power in the United States. The coal is burned and the heat given off is used to convert water into steam, which drives a turbine.
Which coal is mostly found in India?
What are the different types of coal and their uses?
Thermal coal is mostly used for power generation, cement manufacturing and other industrial purposes, while metallurgical coal is used primarily for manufacturing iron and steel. Anthracite is the most mature coal and thus has the highest carbon content of any type of coal.
What is the importance of proximate analysis of coal?
Proximate analysis covers the determination of moisture, volatile matter, fixed carbon, and ash in coals and cokes, and is used to establish the rank of coals, to show the ratio of combustible to incombustible constituents, or to provide the basis for buying/selling, and otherwise evaluating coal for various purposes.
What is the GCV of coal?
The gradation of non-coking coal is based on Gross Calorific Value (GCV), the gradation of coking coal is based on ash content and for semi coking /weakly coking coal it is based on ash plus moisture content, as in vogue as per notification.
Why is proximate analysis so called?
Proximate analysis is one of the first analyses performed on coal after mining. The test involves heating the coal under various conditions for variable amounts of time to determine moisture, volatile matter, fixed carbon, and ash yield.
What is the physical properties of coal?
The porosity also affects the physical and chemical properties of coal. The surface and body of coal are full of holes composed of organic matter and minerals, and coal is a porous solid substance with different pore size distributions; micropores are the main type of pore.
What are the disadvantages of coal?
The major disadvantage of coal is its negative impact on the environment. Coal-burning energy plants are a major source of air pollution and greenhouse gas emissions. In addition to carbon monoxide and heavy metals like mercury, the use of coal releases sulfur dioxide, a harmful substance linked to acid rain.
How is the quality of coal determined?
The most common classification is based on rank, referring to the degree of coalification that has occurred. The rank of a coal is determined primarily by the depth of burial and temperature to which the coal was subjected over time. With increasing temperature, peat is converted to lignite, a very soft, low-rank coal.