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Volatile matter in coal refers to the portion of the coal that is released as gas or vapor when the coal is heated to high temperatures in the absence of air. It primarily consists of hydrocarbons, water vapor, and other organic compounds, which contribute to the coal's combustibility and energy content. Higher volatile matter content typically indicates a coal that ignites more easily and burns more rapidly. It plays a significant role in determining the coal's suitability for various applications, including power generation and industrial processes.
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What is the output of high volatile bituminous coal?
High-volatile coal, in contrast, usually produces anywhere from 18 to 29 million BTUs per ton.
How many BTUs does low volatile bituminous coal produce?
Low- and medium-volatility grade bituminous coal typically generates between 26 and 30 million BTUs per ton.
What is meant by destructive distillation of coal?
Destructive distillation of coal is a process where coal is heated in the absence of air, causing it to decompose into various volatile compounds and solid residues. This process yields by-products such as coal gas, coal tar, and coke. The volatile substances can be further processed into fuels and chemicals, while coke is primarily used as a fuel and reducing agent in metallurgy. Overall, it is a method for extracting valuable materials from coal while minimizing combustion.
Which type of coal has highest heating capacity?
Answer 1Low-volatile bituminous is having highest heating capacity (33412 KJ/Kg). Answer 2Anthracite. Answer 3The anthracite coal heat capacity is 29000 KJ/Kg that is less than Low-volatile bituminous. See link below.
What is the effect of volatile substances and water on calorific value of coal?
Volatile substances in coal tend to increase the calorific value as they can release more energy during combustion. On the other hand, high moisture content in coal reduces the calorific value by absorbing some of the heat energy during combustion to evaporate the water. Overall, the presence of volatile substances can have a greater impact on the calorific value compared to water content.
What has the author R M Felder written?
R. M Felder has written: 'Analysis of volatile products from the slow pyrolysis of coal' -- subject(s): Coal, Testing, Pyrolysis
How do you calculate fixed carbon in coal and coal gross calorific valve.with formula?
To calculate the fixed carbon, the moisture, ash and volatile matter contents (express the weights in percent) are added together and this sum is subtracted from 100 percent. Fixed Carbon = 100% - % (moisture) -% (ash) - % (volatile matter)
What is the difference between fixed carbon and total carbon in coal?
fixed carbon is carbon content of the coal/biomass which is not easily decomposed or combusted at lower temperatures(>200 c), and total carbon content of coal/biomass is volatile carbon present in form of other hydrocarbons forms like volatile organic compounds, etc.. which easily combusted at little higher temperatures (>50 c)
What is the last stage of coal development?
The last stage of coal development is the anthracite stage. Anthracite is the highest rank of coal and is known for its high carbon content and low volatile matter content, making it a high-quality and efficient type of coal for energy production.
How do you convert proximate analysis of coal to ultimate analysis?
To convert proximate analysis of coal to ultimate analysis, use the Dulong formula as follows: Carbon = 0.75*(fixed carbon + [volatile matter/100]); Hydrogen = 0.06volatile matter; Oxygen = [moisture/100] + 0.3sulfur - carbon - hydrogen; Nitrogen = volatile matter/100 * 0.01. This formula estimates the ultimate analysis (C, H, O, N) from the proximate analysis (moisture, volatile matter, fixed carbon, ash).
What phrase best describe bituminous coal?
Bituminous coal is a type of coal that is often referred to as soft coal, containing a high amount of carbon and volatile matter. It is widely used for electricity generation and in the production of steel due to its high heat output and relatively low sulfur content.
What is carbonisation of coal?
Carbonization of coal is a process where coal is heated in the absence of air to drive off volatile compounds, leaving behind a residue of carbon. This process results in the formation of coke, a high-carbon and low-impurity fuel used in industrial processes like steelmaking.
