Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form.
On what basis is coal classified?
Based on maceral content and its appearance in a hand specimen, coal is classified into four principal types: clarain, durain, fusain, and vitrain. Coal may also be classified in grades using subjective terms (e.g., “low-sulfur coal,” “high-ash coal”) with reference to their impurities for commercial purposes.
What are the different types of coal Class 10?
Coals are classified into three main ranks, or types: lignite, bituminous coal, and anthracite. These classifications are based on the amount of carbon, oxygen, and hydrogen present in the coal. Coals other constituents include hydrogen, oxygen, nitrogen, ash, and sulfur.
What are the four main types of coal found in India?
Types of coal found in India
- Anthracite: It is the highest grade of coal containing a high percentage of fixed carbon. …
- Bituminous: It is a medium grade of coal having high heating capacity. …
- Subbituminous: It is black in colour, dull (not shiny) and has a higher heating value than lignite.
How is coal quality measured?
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. Based on these data the so-called fixed carbon content is calculated.
What type of rock is coal?
Coal is a combustible sedimentary rock formed from ancient vegetation which has been consolidated between other rock strata and transformed by the combined effects of microbial action, pressure and heat over a considerable time period. This process is commonly called ‘coalification’.
What are the 4 types of coal?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite.
Which is the 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.
What are the features of coal?
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen.
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 Coal made of?
Coal is formed when dead plant matter submerged in swamp environments is subjected to the geological forces of heat and pressure over hundreds of millions of years. Over time, the plant matter transforms from moist, low-carbon peat, to coal, an energy- and carbon-dense black or brownish-black sedimentary rock.
What are different types of coal What are 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.
Which state is rich in coal?
Coal ReservesStateProvedTotalJHARKHAND4556383152ODISHA3739179295CHHATTISGARH2042857206WEST BENGAL1415631667Ещё 12 строк
Where is coal used in India?
India has abundant domestic reserves of coal. Most of these are in the states of Jharkhand, Odisha, West Bengal, Bihar, Chhattisgarh, Telangana and Madhya Pradesh. On account of the growing needs of the steel industry, a thrust had to be given on systematic exploitation of coking coal reserves in Jharia coalfield.
Which state is first in coal production?
1. Jharkhand – 83.15 billion tonnes. Located in north-east India, the state of Jharkhand top the list of India’s coal reserves — at more than 26% — and production. The state’s main coal-mining centres are Jharia, Bokaro, Auranga, Giridh, Dhanbad, Ramgarh, Karanpur and Hutar.