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Comparative study of MWCNT and alumina supported CоMо hydrotreating catalysts prepared with citric acid as chelating agent. / Kazakov, M. O.; Kazakova, M. A.; Vatutina, Yu V. et al.

In: Catalysis Today, Vol. 357, 01.11.2020, p. 221-230.

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Kazakov MO, Kazakova MA, Vatutina YV, Larina TV, Chesalov YA, Gerasimov EY et al. Comparative study of MWCNT and alumina supported CоMо hydrotreating catalysts prepared with citric acid as chelating agent. Catalysis Today. 2020 Nov 1;357:221-230. doi: 10.1016/j.cattod.2019.03.051

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@article{7219119f934b4fed8d06eb05fdefc623,
title = "Comparative study of MWCNT and alumina supported CоMо hydrotreating catalysts prepared with citric acid as chelating agent",
abstract = " Multi-walled carbon nanotubes (MWCNT) and alumina supported CоMо hydrotreating catalysts prepared with citric acid as a chelating agent (CoMoS/MWCNT-citr and CoMoS/Al 2 O 3 -citr respectively) were studied. MWCNT supported catalyst prepared without chelating agent (CoMoS/MWCNT) was also investigated. The addition of citric acid in MWCNT supported catalyst decreases the average slab length of MoS 2 from 4.2 to 3.0 nm without increasing the stacking, while the differences in sulfidation degree and MoS 2 promotion by cobalt are not observed. The activity of MWCNT-based catalyst in dibenzothiophene hydrodesulfurization (HDS) increases with the addition of citric acid due to improved dispersion of sulfide component. The activity in naphthalene hydrogenation does not change. The results of comparative study of MWCNT and Al 2 O 3 supported catalysts prepared with citric acid show that the catalysts have rather similar morphology of sulfide phase: average slab length of about 3 nm and average stacking number of 1.6-1.7. At the same time, in MWCNT-based catalyst, active metals are sulfided more easily and CoMoS phase is formed at higher extent due to weaker metal-support interaction. CoMoS/MWCNT and CoMoS/Al 2 O 3 -citr catalysts are both highly active in HDS and demonstrate similar conversion of dibenzothiophene. The highest HDS activity of CoMo/MWCNT-citr catalyst is attributed to the beneficial effect that is provided by the combined use of carbon support (higher sulfidation degree and higher CoMoS phase content) and citric acid (improved dispersion of sulfide component). ",
keywords = "Alumina, Cobalt, Hydrodesulfurization, Hydrotreating, Molybdenum, Multi-walled carbon nanotubes, HDS CATALYST, MO CATALYSTS, HYDRODESULFURIZATION ACTIVITY, DEEP DESULFURIZATION, WALLED CARBON NANOTUBES, GAS OIL, NANOPARTICLES, PROMOTION, SCIENCE-AND-TECHNOLOGY, IMPREGNATION",
author = "Kazakov, {M. O.} and Kazakova, {M. A.} and Vatutina, {Yu V.} and Larina, {T. V.} and Chesalov, {Yu A.} and Gerasimov, {E. Yu} and Prosvirin, {I. P.} and Klimov, {O. V.} and Noskov, {A. S.}",
note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = nov,
day = "1",
doi = "10.1016/j.cattod.2019.03.051",
language = "English",
volume = "357",
pages = "221--230",
journal = "Catalysis Today",
issn = "0920-5861",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Comparative study of MWCNT and alumina supported CоMо hydrotreating catalysts prepared with citric acid as chelating agent

AU - Kazakov, M. O.

AU - Kazakova, M. A.

AU - Vatutina, Yu V.

AU - Larina, T. V.

AU - Chesalov, Yu A.

AU - Gerasimov, E. Yu

AU - Prosvirin, I. P.

AU - Klimov, O. V.

AU - Noskov, A. S.

N1 - Publisher Copyright: © 2019 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/11/1

Y1 - 2020/11/1

N2 - Multi-walled carbon nanotubes (MWCNT) and alumina supported CоMо hydrotreating catalysts prepared with citric acid as a chelating agent (CoMoS/MWCNT-citr and CoMoS/Al 2 O 3 -citr respectively) were studied. MWCNT supported catalyst prepared without chelating agent (CoMoS/MWCNT) was also investigated. The addition of citric acid in MWCNT supported catalyst decreases the average slab length of MoS 2 from 4.2 to 3.0 nm without increasing the stacking, while the differences in sulfidation degree and MoS 2 promotion by cobalt are not observed. The activity of MWCNT-based catalyst in dibenzothiophene hydrodesulfurization (HDS) increases with the addition of citric acid due to improved dispersion of sulfide component. The activity in naphthalene hydrogenation does not change. The results of comparative study of MWCNT and Al 2 O 3 supported catalysts prepared with citric acid show that the catalysts have rather similar morphology of sulfide phase: average slab length of about 3 nm and average stacking number of 1.6-1.7. At the same time, in MWCNT-based catalyst, active metals are sulfided more easily and CoMoS phase is formed at higher extent due to weaker metal-support interaction. CoMoS/MWCNT and CoMoS/Al 2 O 3 -citr catalysts are both highly active in HDS and demonstrate similar conversion of dibenzothiophene. The highest HDS activity of CoMo/MWCNT-citr catalyst is attributed to the beneficial effect that is provided by the combined use of carbon support (higher sulfidation degree and higher CoMoS phase content) and citric acid (improved dispersion of sulfide component).

AB - Multi-walled carbon nanotubes (MWCNT) and alumina supported CоMо hydrotreating catalysts prepared with citric acid as a chelating agent (CoMoS/MWCNT-citr and CoMoS/Al 2 O 3 -citr respectively) were studied. MWCNT supported catalyst prepared without chelating agent (CoMoS/MWCNT) was also investigated. The addition of citric acid in MWCNT supported catalyst decreases the average slab length of MoS 2 from 4.2 to 3.0 nm without increasing the stacking, while the differences in sulfidation degree and MoS 2 promotion by cobalt are not observed. The activity of MWCNT-based catalyst in dibenzothiophene hydrodesulfurization (HDS) increases with the addition of citric acid due to improved dispersion of sulfide component. The activity in naphthalene hydrogenation does not change. The results of comparative study of MWCNT and Al 2 O 3 supported catalysts prepared with citric acid show that the catalysts have rather similar morphology of sulfide phase: average slab length of about 3 nm and average stacking number of 1.6-1.7. At the same time, in MWCNT-based catalyst, active metals are sulfided more easily and CoMoS phase is formed at higher extent due to weaker metal-support interaction. CoMoS/MWCNT and CoMoS/Al 2 O 3 -citr catalysts are both highly active in HDS and demonstrate similar conversion of dibenzothiophene. The highest HDS activity of CoMo/MWCNT-citr catalyst is attributed to the beneficial effect that is provided by the combined use of carbon support (higher sulfidation degree and higher CoMoS phase content) and citric acid (improved dispersion of sulfide component).

KW - Alumina

KW - Cobalt

KW - Hydrodesulfurization

KW - Hydrotreating

KW - Molybdenum

KW - Multi-walled carbon nanotubes

KW - HDS CATALYST

KW - MO CATALYSTS

KW - HYDRODESULFURIZATION ACTIVITY

KW - DEEP DESULFURIZATION

KW - WALLED CARBON NANOTUBES

KW - GAS OIL

KW - NANOPARTICLES

KW - PROMOTION

KW - SCIENCE-AND-TECHNOLOGY

KW - IMPREGNATION

UR - http://www.scopus.com/inward/record.url?scp=85063685263&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2019.03.051

DO - 10.1016/j.cattod.2019.03.051

M3 - Article

AN - SCOPUS:85063685263

VL - 357

SP - 221

EP - 230

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

ER -

ID: 19035200