Active phase morphology engineering of NiMo/Al2O3 through La introduction for boosting hydrodesulfurization of 4,6-DMDBT

Liu, Jixing; Liu, Xiangqi; Yan, Rixin; Jia, Lingfeng; Cheng, Huifang; Liu, Hui; Huang, Yuandong; Hua, Mingqing; Li, Huaming; Zhu, Wenshuai

doi:10.1016/j.petsci.2022.09.023

Cited by 55 publications

(17 citation statements)

References 31 publications

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“…Note that the sulfur removal of the above three sulfur-containing substrates follows the order: DBT > 4-MDBT > 4,6-DMDBT. This result may be caused by the steric effect of the methyl groups in 4-MDBT and 4,6-DMDBT, highly decreasing the accessibility of active sites to sulfur atoms. , Additionally, in order to simulate the influence of olefins and aromatic hydrocarbons on the catalytic activity of YS-V O -NMO, 1-octene, toluene, and p -toluene as representative interfering substances are selected to add into the reaction system (Figure S14). It is observed that the desulfurization efficiency is slightly interfered with the addition of 1-octene, confirming that the catalytic reaction system is weakly affected by the presence of olefins.…”

Section: Resultsmentioning

confidence: 99%

Boosting Catalytic Oxidative Desulfurization Performance over Yolk–Shell Nickel Molybdate Fabricated by Defect Engineering

et al. 2023

Inorg. Chem.

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Developing catalysts with optimized surface properties is significant for advanced catalysis. Herein, a rational architectural design is proposed to successfully synthesize yolk–shell nickel molybdate with abundant oxygen vacancies (YS-VO-NMO) via an acid-assisted defect engineering strategy. Notably, YS-VO-NMO with the yolk–shell structure shows complex nanoconfined interior space, which is beneficial to the mass transfer and active sites exposure. Moreover, the defect engineering strategy is of great importance to modulate the surface electronic structure and atomic composition, which contributes to the enrichment of oxygen vacancies. Benefiting from these features, the higher hydrogen peroxide activation is achieved by YS-VO-NMO to produce more hydroxyl radicals compared with untreated nickel molybdate. Consequently, the defect-engineered YS-VO-NMO not only features superior catalytic activity (99.5%) but also retains high desulfurization efficiency after recycling eight times. This manuscript provides new inspiration for designing more promising defective materials via defect engineering and architecture for different applications besides oxidative desulfurization.

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Section: Resultsmentioning

confidence: 99%

Boosting Catalytic Oxidative Desulfurization Performance over Yolk–Shell Nickel Molybdate Fabricated by Defect Engineering

et al. 2023

Inorg. Chem.

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“…In the past few years, sulfoxides (SO x ) originating from combustion of sulfur containing compounds in fossil fuels have caused severe environmental issues, which seriously affect the normal life and health of people. , Accordingly, strict laws and regulations have been issued by governments around the world to the regulate the sulfur contents in diesel . Nowadays, hydrodesulfurization (HDS) is the commercial and widely employed technology in industries to remove and/or convert the sulfur compounds, especially thiophene and mercaptan in the fuel product under both a high operating temperature (∼350 °C) and pressure (∼6 MPa). − However, it requires more stringent conditions to achieve ultra-deep removal of aromatic sulfides [dibenzothiophene (DBT) and its derivatives], which is cost ineffective to the manufacturing enterprise.…”

Section: Introductionmentioning

confidence: 99%

Single Mo Atoms Stabilized on High-Entropy Perovskite Oxide: A Frontier for Aerobic Oxidative Desulfurization

et al. 2023

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The design and preparation of catalysts with both excellent stability and maximum exposure of catalytic active sites is highly desirable; however, it remains challenging in heterogeneous catalysis. Herein, a entropy-stabilized single-site Mo catalyst via a high-entropy perovskite oxide LaMn 0.2 Fe 0.2 Co 0.2 Ni 0.2 Cu 0.2 O 3 (HEPO) with abundant mesoporous structures was initiated by a sacrificial-template strategy. The presence of electrostatic interaction between graphene oxide and metal precursors effectively inhibits the agglomeration of precursor nanoparticles in a high-temperature calcination process, thereby endowing the atomically dispersed Mo 6+ coordinated with four O atoms on the defective sites of HEPO. The unique structure of single-site Mo atoms' random distribution with an atomic scale greatly enriches the oxygen vacancy and increases surface exposure of the catalytic active sites on the Mo/HEPO-SAC catalyst. As a result, the obtained Mo/HEPO-SAC exhibits robust recycling stability and ultra-high oxidation activity (turnover frequency = 3.28 × 10 −2 ) for the catalytic removal of dibenzothiophene (DBT) with air as the oxidant, which represents the top level and is strikingly higher than the state-of-the-art oxidation desulfurization catalysts reported previously under the same or similar reaction conditions. Therefore, the finding here for the first time expands the application of single-atom Mo-supported HEPO materials into the field of ultra-deep oxidative desulfurization.

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“…1–4 At the same time, the quality requirements for fuels, as well as for the quantity and composition of the produced exhaust gases, are becoming stricter. 5–7 One of the main production processes for high-octane components for commercial gasoline is catalytic reforming. Usually, the gasoline fraction produced by catalytic reforming (reformate) contains >50 vol% of C 6 –C 9 aromatics, including benzene and its homologues.…”

Section: Introductionmentioning

confidence: 99%

Gram-scale ruthenium catalysts templated on halloysite nanotubes and MCM-41/halloysite composite for removal of aromatics from gasoline fraction

Vutolkina,

Zasypalov,

Aljajan

et al. 2023

New J. Chem.

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Active phase morphology engineering of NiMo/Al2O3 through La introduction for boosting hydrodesulfurization of 4,6-DMDBT

Cited by 55 publications

References 31 publications

Boosting Catalytic Oxidative Desulfurization Performance over Yolk–Shell Nickel Molybdate Fabricated by Defect Engineering

Boosting Catalytic Oxidative Desulfurization Performance over Yolk–Shell Nickel Molybdate Fabricated by Defect Engineering

Single Mo Atoms Stabilized on High-Entropy Perovskite Oxide: A Frontier for Aerobic Oxidative Desulfurization

Gram-scale ruthenium catalysts templated on halloysite nanotubes and MCM-41/halloysite composite for removal of aromatics from gasoline fraction

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