【Basic Knowledge Activity】Professional “Basic Knowledge” in the petrochemical industry: What is residue carbon?
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This post was last edited by Adventure Wang on 2016-3-6 at 17:14. What is residue? When an oil sample is placed in a residue tester and heated in an environment free from air, the polycyclic aromatic hydrocarbons, gums, asphaltenes, etc., present in the oil evaporate, decompose, and condense. The scale-like black residue that remains after the combustion gases are expelled is known as residue. It is expressed as a percentage by mass. The amount of residue depends mainly on the chemical composition of the oil; a high level of residue indicates that the oil is prone to oxidation, leading to the formation of gums or carbon deposits. ============================================= 【Petrochemical Section】Compilation of professional “basic knowledge” posts (Supported by the large forum; surprises await, and great prizes are up for grabs) http://bbs.hcbbs.com/thread-1557057-1-1.html (Source: Haichuan Chemical Forum) This initiative encourages various sections to organize the publication of basic knowledge posts, or for individuals to do so on their own (the content can be gathered from the Internet or created originally; participation can take place through multiple topics, with no restrictions on the approach used – it could be an explanation of a noun or an introduction to a series of principles). What are some suggestions and methods for getting in touch with cleaners? The regular administrator will reward the content that performs well. You will also be rewarded for regions where the activities are more intensive. (Regions should also carry out consolidation and optimization based on the amount of such content available in their area.) ———————————————— The second phase of the event runs from February 20, 2016, to the end of June 2016; at least 50 award vouchers are available for you to claim (mugs, power banks, USB drives, and other prizes or event benefits). Awards can be given at any time based on performance, and additional rewards can also be granted at any time depending on performance. (12,000 activity points and rewards await those regions that perform well)
Carbon Residue: The residue remaining after the evaporation of a mineral oil sample under specific conditions. It refers to the charblack residue formed when oil products are heated, evaporated, cracked, and burned under specified experimental conditions. The mass fraction is expressed in %. Residue is an indirect indicator of the gel-like substances and unstable compounds present in lubricating oils; it also indicates the degree of refinement of mineral lubricating oils. A higher residue level is observed when the oils contain large amounts of sulfur, oxygen, and nitrogen compounds. Generally, oils that have undergone thorough refining have low residue. The higher the carbon residue value of the oil, the greater its tendency to form carbon deposits; more carbon deposits accumulate in the compressor cylinders, expansion rings, and exhaust valve seats, which can lead to explosions at high temperatures. The level of carbon residue in fuel oil is also an indicator that receives considerable attention when making comparisons. It generally refers to the residue that remains after the fuel oil sample is heated in the absence of additional air; the fuel oil gradually decomposes and cokes, leaving behind this non-volatile residue. The ratio of the weight of this residue to the mass of the fuel oil sample is what we refer to as the carbon residue index. It can be concluded that residual carbon essentially also includes ash; therefore, many fuel oils with additives may have a slightly higher residual carbon content. Generally speaking, straight-run oil products have a relatively low carbon residue content, while fuel oils and heavy oils have a slightly higher carbon residue level, around 10–15%.
Residue left behind after the evaporation of mineral oil samples under specific conditions
Residue: The remaining material left after the evaporation of a mineral oil sample under specific conditions. It refers to the charblack residue formed when oil products are heated, evaporated, cracked, and burned under specified experimental conditions. The mass fraction is expressed in %.
When oil is heated to high temperatures in the absence of air, the hydrocarbons in it undergo evaporation and decomposition reactions, eventually forming coke. The percentage of the oil’s weight that consists of this coke is known as the residue value.
The charred residue formed by the thermal evaporation and combustion of oils under specified experimental conditions.
Carbon Residue: The residue remaining after the evaporation of a mineral oil sample under specific conditions. Residue: Refers to the charred black residue formed when oil products are heated, evaporated, cracked, and burned under specified experimental conditions. The mass fraction is expressed in %. In terms of physical meaning: residue is an indirect indicator of the presence of gel-like substances and unstable compounds in lubricating oils; it also serves as a marker of the degree of refinement of mineral lubricants. When lubricants contain large amounts of sulfur, oxygen, and nitrogen compounds, the residue level is high. Generally, oils that have undergone thorough refining have low residue. The higher the carbon residue value of the oil, the greater its tendency to form carbon deposits; more carbon deposits accumulate in the compressor cylinders, expansion rings, and exhaust valve seats, which can lead to explosions at high temperatures.
It refers to the charblack residue formed when oil products are heated, evaporated, cracked, and burned under specified experimental conditions. The mass fraction is expressed in %
Residue is the material remaining after roasting under oxygen-free conditions; it consists mainly of carbon. Ash, on the other hand, is the material remaining after high-temperature burning under aerobic conditions; it primarily comprises salts and impurities. Residue serves as an indicator for light oils: after dissolution and filtration, any precipitate formed indicates the presence of heavy oils, such as crude oil or residue oil. Similarly, ash is also determined by dissolution and filtration; however, heptane is used to remove impurities, while toluene is used to precipitate the heavy oils
Residue: The residue left behind after the evaporation of a mineral oil sample under specific conditions. It refers to the charblack residue formed when oil products are heated, evaporated, cracked, and burned under specified experimental conditions. The mass fraction is expressed in %.