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

Applied Catalysis A: General, ISSN: 0926-860X, Vol: 688, Page: 119995
2024
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  • Captures
    1
  • Mentions
    1
    • News Mentions
      1
      • News
        1

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Findings from King Fahd University of Petroleum and Minerals in the Area of Chemicals and Chemistry Reported (Enhancing the Selectivity of Light Olefins Through Synergistic Vox/zsm-5 Composite In the Oxidative Cracking of Hexane)

2024 DEC 27 (NewsRx) -- By a News Reporter-Staff News Editor at Middle East Daily -- Fresh data on Chemicals and Chemistry are presented in

Article Description

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.

Bibliographic Details

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

Elsevier BV

Chemical Engineering

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