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Synergistic Ni-MoO3 Redox Catalysis in MIL-101(Cr) for Efficient H2O2 Activation and Ultra-Deep Desulfurization
Huan V Doan1,2, Huong T T Tran3, Duyen T Le4
1Department of Chemical Engineering, Hanoi University of Mining and Geology, Bac Tu Liem, Hanoi, Vietnam.
A novel Ni-MoO3@MIL-101(Cr) catalyst efficiently removes dibenzothiophene (DBT) via oxidative desulfurization (ODS). This robust catalyst achieves 100% sulfur removal under mild conditions with excellent stability.
Area of Science:
- Materials Science
- Catalysis
- Environmental Chemistry
Background:
- Dibenzothiophene (DBT) is a persistent sulfur compound in fuels.
- Oxidative desulfurization (ODS) is a key technology for deep fuel cleaning.
- Developing efficient and stable catalysts for ODS is crucial.
Purpose of the Study:
- To synthesize a novel Ni-MoO3@MIL-101(Cr) composite catalyst.
- To investigate its performance in the oxidative desulfurization of DBT.
- To elucidate the catalytic mechanism and assess its stability.
Main Methods:
- One-step hydrothermal synthesis of Ni-MoO3@MIL-101(Cr).
- Oxidative desulfurization experiments using DBT as a model compound.
- Characterization using SEM, XRD, SAED, XPS, Raman, and TPR.
Main Results:
- Complete DBT removal (∼100%) achieved under mild conditions (50°C, 60 min).
- Catalyst demonstrated excellent stability, retaining 98.7% DBT conversion after five cycles.
- Synergistic Ni-Mo effect and oxygen vacancies enhanced catalytic activity and H2O2 activation.
Conclusions:
- Ni-MoO3@MIL-101(Cr) is a highly efficient and robust catalyst for deep fuel desulfurization.
- The catalyst's performance is attributed to synergistic Ni-Mo interactions and efficient oxygen activation.
- The material shows promise for practical applications in fuel treatment.
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