What is the difference between coal tar and crude oil? Please advise
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Is the hydrogenation of coal tar the same as that of the products obtained after crude oil separation?
It depends on the type of coal tar and the pretreatment methods; the diesel fractions obtained through hydrogenation of coal tar distillates can meet the National V standards.
The high, medium, and low distillates – those similar to the distillates separated from crude oil
Coal tar contains a high amount of aromatics, while crude oil contains a high amount of alkanes.
Coal tar is classified into low-temperature, medium-temperature, and high-temperature types, with varying compositions. Generally, low-temperature coal tar can be converted into diesel fuel that meets the standards of National Standard V through hydrogenation, whereas medium- and high-temperature coal tar contain high levels of naphthenes and aromatics; as a result, their cetane numbers are low after hydrogenation, and they do not meet the required standards