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Ni and V removal from oil and model compounds without hydrogenation: Natural chabazite as solid acid
Author(s) -
Rocha Aguilera Gonzalo,
Yang Shaofeng,
Junaid Abu S. M.,
Kuznicki Steven M.,
McCaffrey William C.
Publication year - 2016
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22463
Subject(s) - chabazite , vanadium , nickel , chemistry , catalysis , chemical engineering , hydrogen , tungsten , inorganic chemistry , materials science , organic chemistry , zeolite , engineering
Recently, natural chabazite was identified as a catalyst for a novel thermocatalytic oil upgrading process. To further develop this process, it is essential to understand the chemical reactions involved. In this study, up to 67.5 % vanadium removal from oil sands bitumen is obtained without adding hydrogen. Using model compounds, vanadium removals up to 47.9 % and nickel removals up to 3.4 % were obtained after a 1 h reaction at 400 °C. Nickel removal up to 90.0 % at equilibrium and room temperature was observed. Evidence of free‐base porphyrin formation is presented. It was also found that chabazite can catalyze the dealkylation of octaethylporphyrins. The results presented here allow for a better understanding of the chemical properties of chabazite and open the possibility for the creation of pretreatment processes that can remove metals and modify the structure of petroleum‐derived fractions without using hydrogen or rejecting substantial amounts of usable oil.