Research output: Contribution to journal › Article › peer-review
Effect of mono-, di-, and triethylene glycol on the activity of phosphate-doped NiMo/al 2 O 3 hydrotreating catalysts. / Nuzhdin, Alexey L.; Bukhtiyarova, Galina A.; Porsin, Aleksander A. et al.
In: Catalysts, Vol. 9, No. 1, 96, 01.01.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of mono-, di-, and triethylene glycol on the activity of phosphate-doped NiMo/al 2 O 3 hydrotreating catalysts
AU - Nuzhdin, Alexey L.
AU - Bukhtiyarova, Galina A.
AU - Porsin, Aleksander A.
AU - Prosvirin, Igor P.
AU - Deliy, Irina V.
AU - Volodin, Vladimir A.
AU - Gerasimov, Evgeny Yu
AU - Vlasova, Evgeniya N.
AU - Bukhtiyarov, Valerii I.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The effect of glycols on the catalytic properties of phosphate-doped NiMo/Al 2 O 3 catalysts in the hydrotreating of straight-run gas oil (SRGO) was studied. The NiMo(P)/Al 2 O 3 catalysts were prepared using ethylene glycol (EG), diethylene glycol (DEG), and triethylene glycol (TEG) as additives. The organic agent was introduced into the aqueous impregnation solution obtained by the dissolving of MoO 3 in H 3 PO 4 solution, followed by Ni(OH) 2 addition. The Raman and UV–Vis studies show that the impregnation solution contains diphosphopentamolybdate H x P 2 Mo 5 O 23 (6−x)− and Ni(H 2 O) 6 2+ , and that these ions are not affected by the presence of glycols. When the impregnation solution comes in contact with the γ-Al 2 O 3 surface, H x P 2 Mo 5 O 23 (6−x)− is decomposed completely. The catalysts were characterized by Raman spectroscopy, low-temperature N 2 adsorption, X-ray photoelectron spectroscopy, and transmission electron microscopy. It is shown that the sulfide catalysts prepared with glycols display higher activity in the hydrotreating of straight-run gas oil than the NiMoP/Al 2 O 3 catalyst prepared without the additive. The hydrodesulfurization and hydrodenitrogenation activities depend on the glycol type and are decreased in the following order: NiMoP-DEG/Al 2 O 3 > NiMoP-EG/Al 2 O 3 > NiMoP-TEG/Al 2 O 3 > NiMoP/Al 2 O 3 . The higher activity of NiMoP-DEG/Al 2 O 3 can be explained with the higher dispersion of molybdenum on the surface of the catalyst in the sulfide state.
AB - The effect of glycols on the catalytic properties of phosphate-doped NiMo/Al 2 O 3 catalysts in the hydrotreating of straight-run gas oil (SRGO) was studied. The NiMo(P)/Al 2 O 3 catalysts were prepared using ethylene glycol (EG), diethylene glycol (DEG), and triethylene glycol (TEG) as additives. The organic agent was introduced into the aqueous impregnation solution obtained by the dissolving of MoO 3 in H 3 PO 4 solution, followed by Ni(OH) 2 addition. The Raman and UV–Vis studies show that the impregnation solution contains diphosphopentamolybdate H x P 2 Mo 5 O 23 (6−x)− and Ni(H 2 O) 6 2+ , and that these ions are not affected by the presence of glycols. When the impregnation solution comes in contact with the γ-Al 2 O 3 surface, H x P 2 Mo 5 O 23 (6−x)− is decomposed completely. The catalysts were characterized by Raman spectroscopy, low-temperature N 2 adsorption, X-ray photoelectron spectroscopy, and transmission electron microscopy. It is shown that the sulfide catalysts prepared with glycols display higher activity in the hydrotreating of straight-run gas oil than the NiMoP/Al 2 O 3 catalyst prepared without the additive. The hydrodesulfurization and hydrodenitrogenation activities depend on the glycol type and are decreased in the following order: NiMoP-DEG/Al 2 O 3 > NiMoP-EG/Al 2 O 3 > NiMoP-TEG/Al 2 O 3 > NiMoP/Al 2 O 3 . The higher activity of NiMoP-DEG/Al 2 O 3 can be explained with the higher dispersion of molybdenum on the surface of the catalyst in the sulfide state.
KW - Diethylene glycol
KW - Ethylene glycol
KW - Hydrodenitrogenation
KW - Hydrodesulfurization
KW - Phosphate-doped NiMo/Al O catalyst
KW - Straight-run gas oil
KW - Triethylene glycol
KW - XPS
KW - HYDRODESULFURIZATION
KW - STATE
KW - SULFUR
KW - triethylene glycol
KW - diethylene glycol
KW - hydrodenitrogenation
KW - ethylene glycol
KW - CITRIC-ACID
KW - hydrodesulfurization
KW - phosphate-doped NiMo/Al2O3 catalyst
KW - ADDITIVES
KW - MOLYBDATE
KW - ALUMINA
KW - straight-run gas oil
KW - SULFIDATION MECHANISM
KW - METAL
KW - IMPREGNATION
UR - http://www.scopus.com/inward/record.url?scp=85060724561&partnerID=8YFLogxK
U2 - 10.3390/catal9010096
DO - 10.3390/catal9010096
M3 - Article
AN - SCOPUS:85060724561
VL - 9
JO - Catalysts
JF - Catalysts
SN - 2073-4344
IS - 1
M1 - 96
ER -
ID: 18484727