Vaporization Daily Question: 2016-12-3 Quiz (5 points for participation, 10 points for a correct answer)

After the volatiles are removed from coal through pyrolysis, the remaining non-volatile substances are called coke; fixed carbon is the coke minus the ash content. Different coal types have varying fixed carbon contents. Fixed carbon is a fundamental component involved in the gasification reaction.

Fixed carbon is an indicator of the degree of coal metamorphism, increasing as the degree of metamorphism increases. After removing moisture, ash, and volatile matter from coal, what remains is fixed carbon

Fixed carbon in coal is a component of the industrial analysis, and it is standardized as a result obtained under specific test conditions. Elemental carbon is the main element in coal. In addition to carbon elements, fixed carbon also contains a small amount of sulfur and trace amounts of hydrocarbons that have not been completely decomposed; therefore, fixed carbon in coal cannot be simply considered to be the carbon elements of coal – the two are entirely different

Fixed carbon refers to the solid residue remaining after the organic matter in coal undergoes pyrolysis at high temperatures, with the gaseous products escaping. Its main component is carbon. Under laboratory conditions, it can be expressed as the residue remaining after measuring the volatiles in a coal sample, minus the ash content. In industrial analysis, it is typically calculated as a percentage of 100 minus the percentages for moisture, ash, and volatiles. Field of study: Electricity (primary discipline) ； Fuel (sub-discipline): Another definition is the residue obtained by subtracting ash from the residue left after measuring the volatile matter content of coal samples. Related discipline: Coal Science and Technology (primary discipline) ； Coal Processing and Utilization (secondary discipline) ； Coal Chemistry and Coal Quality Analysis (Sub-discipline Level 3)

When determining the volatiles in coal, the remaining non-volatile substances are called cokings. Fixed carbon is defined as the residue after ash is removed. It is the non-volatile solid combustible material in coal, and can be calculated using mathematical methods. The appearance of cokereast is closely related to the properties of the organic matter in coal; therefore, based on the visual characteristics of cokereast, it is possible to qualitatively assess the caking property and industrial applications of coal.

The fixed carbon in coal (denoted as FC) refers to the residue remaining after removing moisture, ash, and volatile matter; the fixed carbon content of coal is equal to 100% minus the percentage of moisture, ash, and volatile matter in the coal.

After removing moisture, ash, and volatile matter from coal, what remains is fixed carbon. Fixed carbon is an important source of the calorific value of coal; therefore, some use fixed carbon as the main parameter for calculating the calorific value of coal. Fixed carbon is also an important indicator for coal used in ammonia synthesis.

When determining the volatiles in coal, the remaining non-volatile substances are called cokings. Fixed carbon is defined as the residue after ash is removed. It is the non-volatile solid combustible material in coal

After the volatiles are removed from coal through pyrolysis, the remaining non-volatile substances are known as cokerearth; fixed carbon is the amount of carbon remaining after the ash content is deducted from the cokerearth. Different coal types have varying fixed carbon contents. Fixed carbon is a fundamental component involved in the gasification reaction. 　　In the coal industry, it refers to the reactive carbonaceous material remaining after the volatiles have been released. The content of fixed carbon in coal or coke is expressed as a weight percentage, which is obtained by subtracting the weight of moisture, volatiles, and ash from the weight of the sample, or by subtracting the weight of volatiles and ash from the weight of the sample. The content of fixed carbon is one of the criteria for classifying coal, as well as a quality indicator for coal and coke. Generally, the fewer volatile substances, the more fixed carbon there is. In the laboratory, about 1 gram of the sample powder is placed in a covered standard crucible and heated at 850°C for 7 minutes. After the water and volatile substances are driven off, ash content is determined by subtracting it from the remaining weight. In the asphalt industry, it refers to components that are soluble in benzene, toluene, or carbon disulfide. Also known as combined carbon, to distinguish it from insoluble free carbon. 　　The fixed carbon content refers to the residue remaining in coal after water, ash, and volatile matter have been removed; it is an important indicator for determining the quality and uses of coal.

Definition 1: The solid residue resulting from the pyrolysis of organic matter in coal at high temperatures, with gaseous products being released; its main component is carbon. Under laboratory conditions, it can be expressed as the residue remaining after measuring the volatiles in the coal sample and subtracting the ash content. In industrial analysis, it is typically calculated as a percentage of 100 minus the percentages for moisture, ash, and volatiles. Definition 2: The residue obtained by subtracting the ash content from the residue resulting from the measurement of the volatile yield of a coal sample.