Coal

Coal is a key fossil fuel that is used worldwide for energy generation, industrial processes and the production of numerous products. Its formation over millions of years and its extraction through open-cast and underground mining characterize its availability and use. While coal offers economic advantages as a raw material and has a wide range of applications, its use also entails considerable environmental and health risks. This introduction highlights the importance of coal, its origins, mining methods, products and the advantages and disadvantages of its use. Read the latest coal news from the Table.Briefings editorial team here! What is coal? Coal is a black, solid fuel that consists mainly of carbon. It is formed by the superposition and compression of plant residues over millions of years under high pressure and without oxygen. Coal is a fossil fuel that is used to generate energy in power plants, steel production and other industrial processes. There are different types of coal, such as lignite and hard coal, which differ in their carbon content and energy content. Burning coal contributes to global warming as it releases large amounts of carbon dioxide, which pollutes the environment. How is coal formed? Coal is formed through a long geological process that takes place over millions of years. Originally, it is the remains of dead plants that are deposited in swampy areas. These remains are preserved under water and without oxygen, resulting in peat. Over time, the peat layers are covered by sediments and become increasingly compacted. High pressure and rising temperatures transform the peat first into lignite and later, with further pressure and heat, into hard coal. This process, called coalification, leads to an increasing carbon content and a higher energy content of the coal. How is coal mined? Coal is mined in two main ways: opencast mining and underground mining. In open-cast mining, the coal is extracted close to the earth's surface. First, the upper layers of earth are removed in order to reach the coal seams. This type of mining is cost-effective, but leaves behind extensive damage to the landscape. In underground mining, coal is extracted from deeper layers. Miners work in tunnels and shafts to extract the coal. This method is more expensive and more dangerous, but protects the landscape. After mining, the coal is cleaned and prepared for transportation. Both methods have environmental impacts, including soil degradation and water pollution. What products are made from coal? Coal is a versatile raw material that is used to make a variety of products that play an important role in various industries and in everyday life. The most important use of coal is in energy production. Coal is burned in coal-fired power stations to generate electricity. The energy stored in the coal is released and converted into electrical energy. Another important product made from coal is coke, which plays a key role in the steel industry in particular. Coke is produced by heating hard coal in the absence of air. It is used in the blast furnace process to reduce iron ore and melt iron, which is an essential step in steel production. In the chemical industry, coal is used as a raw material for the production of a variety of chemicals. The processing of coal produces by-products such as tar, benzene, ammonia and methanol. These raw materials are starting points for the production of plastics, paints, fertilizers, solvents and medicines. For example, coal tar is used to produce bitumen, which is used in road construction. Another product made from coal is activated carbon, which is known for its ability to adsorb impurities. Activated carbon is used in water and air purification to remove pollutants and is also used in medicine, for example to treat poisoning. Lignite briquettes, which are pressed from brown coal, are another product used as fuel for domestic heating systems. They provide a cost-effective source of heat, especially in regions without access to natural gas. These diverse products show the central importance of coal in various areas of the economy and in everyday life. What are the advantages and disadvantages of coal? Coal has both advantages and disadvantages that characterize its role as an energy source and raw material. Advantages: Disadvantages: Overall, coal offers economic advantages, but has considerable ecological and health disadvantages.