Microwave-assisted nickel and vanadium removal from crude oil
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Type
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Journal
Article
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Author
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Hui
Shang
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Author
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Yu
Liu
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URL
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Volume
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142
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Pages
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250-257
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Publication
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Fuel
Processing Technology
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Date
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February
2016
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Abstract
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Crude
oil contains traces of metal complexes, including vanadium (V) and nickel
(Ni) compounds, which are the most harmful catalyst poisons of fluid
catalytic cracking (FCC) and hydrogenation units. These metals are difficult
to remove, since they exist in crude oil as stable oil-soluble complexes. Microwave
technology offers a new way for Ni/V removal. Researchers investigated their
removal efficiency using chemical reagents and the mechanism of
microwave-assisted demetallization.
They determined that demetallization efficiency can be highly enhanced under microwave irradiation. There is no specific structural selectivity for vanadium porphyrins during microwave treatment process. The demetallization agent — methanesulfonic acid, containing a sulfonyl acid group was found to react with VO2 + and Ni2 +. Ni and V were removed from porphyrin ring without destroying the ring structure, corresponding water soluble inorganic salts were formed, and accordingly can be successfully separated from crude oil by washing or desalting process. |
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