What is raw material residue carbon? What is it related to?
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What is raw material residue carbon? What is it related to?
Residual carbon of the feedstock is a characteristic parameter used to measure the tendency of catalytic cracking feedstocks to form non-catalytic coke. It is related to the composition of the raw materials. The carbon residue value of distillate oil is very low, while that of residue oil is relatively high. Residual carbon is the precursor to raw coke.
Residue refers to the residue formed during the heating, evaporation, and cracking of oil products under specified conditions. A high amount of residue indicates that the oil is prone to oxidation, leading to gum formation or carbon deposition.
Residue carbon is not the impurity content in the raw material; it is a measurement value from a specific test. It is the precursor to coking; it is an indicator of the relative tendency of petroleum products to coke. There are two methods for determining residual carbon: the electric furnace method and the Kohn method, with the latter being commonly used. The determination method involves placing a fixed amount of the sample in a crucible and performing decomposition distillation to obtain the residue.
It generally refers to Coulson residue; coke is easily formed during the reaction process, and it is the carbonaceous residue remaining after destructive distillation in the laboratory. It can be used as a characteristic indicator to measure the tendency for non-catalytic coke formation in the catalytic feed. As the content of resins and asphaltenes in the feed increases, the residue content of the raw material rises. Last edited by FloatHead on 2009-3-19 23:05]
The oil is placed in a tester and heated in an atmosphere free of air; the polycyclic aromatic hydrocarbons, gums, asphaltenes, etc. present in the oil evaporate due to the heat, undergo decomposition and condensation. The scale-like black residue that remains after the combustion gases are expelled is known as residue carbon, and it indicates the degree to which the oil is prone to oxidation, resulting in gum formation or carbon deposition
The oil is placed in a testing container and heated under conditions free from air; as the oil evaporates, decomposes, and condenses, the percentage of the black residue remaining after the combustion gases are expelled constitutes the residue on ignition. A high residue content indicates that the oil is prone to oxidation, leading to gum formation or carbon deposition.