Enhancing the selectivity of light olefins through synergistic VOx/ZSM-5 composite in the oxidative cracking of hexane

Hussein K. Amusa; Saheed Lateef; Sagir Adamu; Idris A. Bakare; Abeer S. Arjah; Saad A. Al-Bogami; Sameer Al-Ghamdi; Shaikh A. Razzak; Mohammad M. Hossain

doi:10.1016/j.apcata.2024.119995

Enhancing the selectivity of light olefins through synergistic VO_x/ZSM-5 composite in the oxidative cracking of hexane

Hussein K. Amusa, Saheed Lateef, Sagir Adamu, Idris A. Bakare, Abeer S. Arjah, Saad A. Al-Bogami, Sameer Al-Ghamdi, Shaikh A. Razzak, Mohammad M. Hossain^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Oxidative-aided cracking of n-hexane is studied in a gas-phase oxygen-free environment over VO_x/ZSM-5. The catalysts were prepared by impregnation of VO_x on ZSM-5. Characterization of the prepared samples using XRD, SEM, and BET showed smooth, fine, highly crystalline, and highly dispersed VO_x on ZSM-5. Raman spectroscopy revealed the presence of isolated moieties on the 1.5 and 2.5 % vanadia loading while a small number of polyvanadate species are detected on the 5 % VO_x sample. TPR confirmed the ZSM-5 support contains highly reducible vanadia species. The amount of VO_x loading also affected the activity and product distribution. The olefin and CO_x selectivities are affected by reaction time/temperature and amount/availability of lattice oxygen. VO_x/ZSM-5(1.5) showed 99.9 % n-hexane conversion and 91.39 olefin selectivity at 575 °C and 25 s time-on-stream. This superior performance is attributed to the intermittent release of oxygen, optimum acidity, microporosity, and mesoporosity.

Original language	English
Article number	119995
Journal	Applied Catalysis A: General
Volume	688
DOIs	https://doi.org/10.1016/j.apcata.2024.119995
State	Published - 25 Dec 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.

Keywords

Catalytic Oxidative Cracking
Lattice oxygen, Light olefins
Zeolite, Metal Oxide

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

Access to Document

10.1016/j.apcata.2024.119995

Cite this

@article{810eb256319a432aa90bdab53db54f09,

title = "Enhancing the selectivity of light olefins through synergistic VOx/ZSM-5 composite in the oxidative cracking of hexane",

abstract = "Oxidative-aided cracking of n-hexane is studied in a gas-phase oxygen-free environment over VOx/ZSM-5. The catalysts were prepared by impregnation of VOx on ZSM-5. Characterization of the prepared samples using XRD, SEM, and BET showed smooth, fine, highly crystalline, and highly dispersed VOx on ZSM-5. Raman spectroscopy revealed the presence of isolated moieties on the 1.5 and 2.5 % vanadia loading while a small number of polyvanadate species are detected on the 5 % VOx sample. TPR confirmed the ZSM-5 support contains highly reducible vanadia species. The amount of VOx loading also affected the activity and product distribution. The olefin and COx selectivities are affected by reaction time/temperature and amount/availability of lattice oxygen. VOx/ZSM-5(1.5) showed 99.9 % n-hexane conversion and 91.39 olefin selectivity at 575 °C and 25 s time-on-stream. This superior performance is attributed to the intermittent release of oxygen, optimum acidity, microporosity, and mesoporosity.",

keywords = "Catalytic Oxidative Cracking, Lattice oxygen, Light olefins, Zeolite, Metal Oxide",

author = "Amusa, {Hussein K.} and Saheed Lateef and Sagir Adamu and Bakare, {Idris A.} and Arjah, {Abeer S.} and Al-Bogami, {Saad A.} and Sameer Al-Ghamdi and Razzak, {Shaikh A.} and Hossain, {Mohammad M.}",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier B.V.",

year = "2024",

month = dec,

day = "25",

doi = "10.1016/j.apcata.2024.119995",

language = "English",

volume = "688",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Enhancing the selectivity of light olefins through synergistic VOx/ZSM-5 composite in the oxidative cracking of hexane

AU - Amusa, Hussein K.

AU - Lateef, Saheed

AU - Adamu, Sagir

AU - Bakare, Idris A.

AU - Arjah, Abeer S.

AU - Al-Bogami, Saad A.

AU - Al-Ghamdi, Sameer

AU - Razzak, Shaikh A.

AU - Hossain, Mohammad M.

PY - 2024/12/25

Y1 - 2024/12/25

N2 - Oxidative-aided cracking of n-hexane is studied in a gas-phase oxygen-free environment over VOx/ZSM-5. The catalysts were prepared by impregnation of VOx on ZSM-5. Characterization of the prepared samples using XRD, SEM, and BET showed smooth, fine, highly crystalline, and highly dispersed VOx on ZSM-5. Raman spectroscopy revealed the presence of isolated moieties on the 1.5 and 2.5 % vanadia loading while a small number of polyvanadate species are detected on the 5 % VOx sample. TPR confirmed the ZSM-5 support contains highly reducible vanadia species. The amount of VOx loading also affected the activity and product distribution. The olefin and COx selectivities are affected by reaction time/temperature and amount/availability of lattice oxygen. VOx/ZSM-5(1.5) showed 99.9 % n-hexane conversion and 91.39 olefin selectivity at 575 °C and 25 s time-on-stream. This superior performance is attributed to the intermittent release of oxygen, optimum acidity, microporosity, and mesoporosity.

AB - Oxidative-aided cracking of n-hexane is studied in a gas-phase oxygen-free environment over VOx/ZSM-5. The catalysts were prepared by impregnation of VOx on ZSM-5. Characterization of the prepared samples using XRD, SEM, and BET showed smooth, fine, highly crystalline, and highly dispersed VOx on ZSM-5. Raman spectroscopy revealed the presence of isolated moieties on the 1.5 and 2.5 % vanadia loading while a small number of polyvanadate species are detected on the 5 % VOx sample. TPR confirmed the ZSM-5 support contains highly reducible vanadia species. The amount of VOx loading also affected the activity and product distribution. The olefin and COx selectivities are affected by reaction time/temperature and amount/availability of lattice oxygen. VOx/ZSM-5(1.5) showed 99.9 % n-hexane conversion and 91.39 olefin selectivity at 575 °C and 25 s time-on-stream. This superior performance is attributed to the intermittent release of oxygen, optimum acidity, microporosity, and mesoporosity.

KW - Catalytic Oxidative Cracking

KW - Lattice oxygen, Light olefins

KW - Zeolite, Metal Oxide

UR - http://www.scopus.com/inward/record.url?scp=85207368794&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2024.119995

DO - 10.1016/j.apcata.2024.119995

M3 - Article

AN - SCOPUS:85207368794

SN - 0926-860X

VL - 688

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

M1 - 119995

ER -