What are the non-condensable gas components that appear in used lubricating oil during vacuum distillation?
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During the vacuum distillation of used lubricating oil, a large amount of non-condensable gases are produced before the oil is obtained. What are the main components of these non-condensable gases? After oil production, the non-condensable gases are reduced or even absent. However, once the temperature of the used oil rises to a certain level, a large amount of non-condensable gases appear again. Are the components of these non-condensable gases similar to those that appeared earlier? If not, what are the main components at this time?
Before oil is discharged, a large amount of non-condensable gases are produced, mainly water vapor, carbon monoxide, carbon dioxide, and hydrocarbons with 1–4 carbon atoms. However, when the temperature of the used oil rises to a certain level, another large amount of non-condensable gases appears; these gases are cracking gases, with hydrocarbons having 1–4 carbon atoms as their main components. If the container leaks, carbon monoxide and carbon dioxide are also present
The odor of the non-condensable gases in this section is quite strong; they are gases resulting from the decomposition of certain additives