减压渣油供氢剂减黏裂化研究
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Abstract: The roles of such classical hydrogen-donor solvents as tetralin, decahydronaphthalene, dihydrophenanthrene and dihydroanthracene in visbreaking of vacuum residue were examined. It revealed that the effect of the hydrogendonor solvents could be ranked as dihydrophenanthrene≈dihydroanthracene> tetralin> dihydrophenanthrene and that the appropriate amount added was around 15%. Further studies showed that the coke formation can be greatly reduced by adding hydrogen-donor solvents, consequently the hydrogen-donor approach allowed the operation of visbreaking at higher severity. The effect of hydrogen could be negligible when the hydrogen pressure was lower than 2.5MPa.
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Key words:
- visbreaking /
- hydrogendonor solvents /
- hydrogen present /
- hydrogen donor order /
- operating seversity
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