What are coal products types formation process and uses
Coal is widely used all over the world. Known as one of the most important fossil fuels, coal holds many applications like production of heat, firing industrial generators, producing cast iron etc. It can likewise be created in the business to get items like coke, tar and coal gas. These side-effects are gainful to us as well.
Coke: Coke is a high-carbon item obtained by the ruinous refining of coal. The measure of carbon content in coke is high to the point that it is supposed to be a nearly unadulterated type of carbon. Coke is greyish-dark in shading and is a hard, permeable strong.
Uses: The most well-known utilization of coke is as a fuel for ovens, heaters and blacksmithing. It is once in a while favoured over coal since consuming coke delivers next to no smoke. It is likewise used to create iron in an impact heater. Coke is utilized to produce steel and numerous different materials.
Coal Tar: It is acquired as a result during the time spent creation coke. In spite of the fact that its shading is equivalent to coke, tar is an exceptionally gooey fluid. It additionally has a very terrible smell.
Uses: Coal tar is broadly used to fabricate paints, scents, engineered colours, photographic material, medications and explosives. It tends to be used to make bug sprays and pesticides. Naphthalene balls that are ordinarily used to fend moths off are produced using tar. Coal tar is an element hostile to dandruff and lice-repulsing shampoos, cleansers and salves.
Coal Gas: This is likewise gotten as a side-effect while creating coke, and once more, much the same as tar, its smell isn't extremely lovely. It is a profoundly combustible gas as its primary part is methane. In this manner, if not directed cautiously, it can blend with air bringing about blasts.
Uses: It is predominantly utilized as a fuel in enterprises arranged close to coal preparing plants. Prior, it was utilized as a wellspring of light. In the year 1820, it was utilized in London just because of road lighting. Presently, it is all the more ordinarily used to give warmth to residential and mechanical purposes.
Coke - Definition
It is an extreme, permeable and dark substance. It is a practically unadulterated type of carbon. Coke is utilized in the assembling of steel and in the extraction of numerous metals.
Properties:
The most significant properties of coke are debris and sulphur content, which are directly reliant on the coal utilized for creation. Coke with less debris and sulphur content is exceptionally estimated available.
Coal Tar - Definition
It is a dark, thick fluid with a terrible smell. It is a blend of around 200 substances.
Properties:
Coal tar is utilized as beginning materials for assembling different substances utilized in regular daily existence and in industry, similar to manufactured colours, drugs, explosives, aromas, plastics, paints and so on.
Coal Gas - Definition
Coal gas is acquired during the handling of coal to get coke.
Properties:
It is utilized as a fuel in numerous enterprises arranged close to the coal handling plants.
FAQs on Coal Products and Their Formation from Coal
1. What are coal products in chemistry?
Coal products are the useful substances obtained from coal by the process of destructive distillation in the absence of air. When coal is heated strongly without oxygen, it decomposes into:
- Coke – almost pure carbon (solid)
- Coal tar – thick black liquid containing many organic compounds
- Coal gas – combustible gaseous fuel
2. What is destructive distillation of coal?
Destructive distillation of coal is the process of heating coal strongly in the absence of air to obtain coke, coal tar, and coal gas. During this process:
- Coal undergoes thermal decomposition.
- Volatile substances escape as gases and vapors.
- A solid carbon-rich residue called coke remains.
3. What is coke and what are its uses?
Coke is a nearly pure form of carbon obtained as a solid residue during the destructive distillation of coal. Its main uses include:
- As a fuel in blast furnaces for extracting iron.
- As a reducing agent in metallurgy (e.g., reduction of metal oxides).
- In the manufacture of water gas by reaction with steam:
C(s) + H2O(g) → CO(g) + H2(g)
4. What is coal tar and what is it used for?
Coal tar is a thick, black liquid mixture of many organic compounds formed during the destructive distillation of coal. It contains substances such as:
- Benzene (C6H6)
- Toluene (C7H8)
- Naphthalene (C10H8)
5. What is coal gas and what is its composition?
Coal gas is a combustible gaseous fuel obtained during the destructive distillation of coal. It mainly contains:
- Hydrogen (H2)
- Methane (CH4)
- Carbon monoxide (CO)
6. What is the difference between coal and coke?
Coal is a naturally occurring fossil fuel, while coke is a nearly pure carbon product obtained from coal by destructive distillation. The main differences are:
- Coal: Contains carbon along with hydrogen, oxygen, sulfur, and nitrogen compounds.
- Coke: Contains mostly carbon with very few impurities.
- Coal is used as a raw fuel; coke is mainly used in metallurgy as a reducing agent.
7. How is coke used in the extraction of iron?
Coke is used as both a fuel and a reducing agent in the blast furnace during iron extraction. In the furnace:
- Coke burns to form carbon dioxide:
C(s) + O2(g) → CO2(g) - Carbon dioxide reacts with more coke to form carbon monoxide:
CO2(g) + C(s) → 2CO(g) - Carbon monoxide reduces iron(III) oxide:
Fe2O3(s) + 3CO(g) → 2Fe(l) + 3CO2(g)
8. What are the main components of coal?
Coal mainly consists of carbon along with smaller amounts of hydrogen, oxygen, nitrogen, sulfur, and mineral matter. Its composition typically includes:
- Carbon (50–95%) depending on the type of coal
- Hydrogen and oxygen in organic compounds
- Impurities such as sulfur compounds and ash-forming minerals
9. What are the types of coal?
The main types of coal are peat, lignite, bituminous coal, and anthracite, classified based on carbon content and calorific value. They are:
- Peat – lowest carbon content, least energy
- Lignite – soft brown coal, moderate carbon
- Bituminous coal – widely used industrial coal
- Anthracite – highest carbon content, highest calorific value
10. Why is coal considered a non-renewable resource?
Coal is considered a non-renewable resource because it takes millions of years to form from buried plant matter under high pressure and temperature. The formation process involves:
- Accumulation of plant material in swamps
- Partial decomposition to form peat
- Gradual conversion into higher forms of coal under geological conditions
