Bifunctional NiMo/HY-γ-Al2O3 catalysts for an effective production of ultra-low sulfur diesel

Rasrendra, Carolus B.; Maulidanti, Ellen G.; Darlismawantyani, Sarah E.P.; Nurdini, Nadya; Rustyawan, Wawan; Subagjo,; Kadja, Grandprix T.M.

doi:10.1016/j.cscee.2023.100427

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…[16,18,19,[21][22][23][24][25][26] The direct desulfurization of dibenzothiophene is kinetically dominant over conventional γ-Al 2 O 3 supported Ni-MoS 2 and Co-MoS 2 catalysts and even over unconventional noble metal promoted MoS 2 catalysts. [26][27][28][29][30][31][32][33][34][35] Accordingly, it is generally agreed that MoS 2 is the active phase of the catalysts and that secondary metals such as Ni, Co, and even noble metals essentially act as promoters of the MoS 2 phase. However, the role and functionalities of the metallic promoters is still not fully understood despite extensive experimental [26][27][28][29][30][31][32][33][34][36][37][38][39] and theoretical efforts.…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28][29][30][31][32][33][34][35] Accordingly, it is generally agreed that MoS 2 is the active phase of the catalysts and that secondary metals such as Ni, Co, and even noble metals essentially act as promoters of the MoS 2 phase. However, the role and functionalities of the metallic promoters is still not fully understood despite extensive experimental [26][27][28][29][30][31][32][33][34][36][37][38][39] and theoretical efforts. [40][41][42][43][44] A usual conception of the field is that metallic promoters are in a sulfided state during hydrodesulfurization.…”

Section: Introductionmentioning

confidence: 99%

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Interplay Between Ni and Brønsted and Lewis Acid Sites in the Hydrodesulfurization of Dibenzothiophene

Valderrama‐Zapata,

García‐Sánchez,

Vargas‐Montañez

et al. 2024

ChemPhysChem

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NiMo‐S₂/γ‐Al₂O₃ catalysts are commonly used in hydrotreating to enhance fossil fuel quality. The extensive research on these catalysts reveals a gap in understanding the role of Ni, often underestimated as an inactive sulfide phase or just a MoS₂ promoter. In this work, we focused on analyzing whether well‐dispersed supported nickel nanoparticles can be active in the hydrodesulfurization of dibenzothiophene. We dispersed Ni by the Strong Electrostatic Adsorption (SEA) method over four supports with different types of acidity: silica (~ neutral acidity), γ‐Al₂O₃ (Lewis acidity), H+‐Y zeolite, and microporous‐mesoporous H+‐Y zeolite (both with Brønsted‐Lewis acidity). Our findings reveal that Ni is indeed active in dibenzothiophene hydrodesulfurization, even with alumina and silica as supports, although their catalytic activity declines abruptly in the first hours. Contrastingly, the acid nature of zeolites imparts sustained stability and performance, attributed to robust metal‐support interactions. The efficacy of the SEA method and the added mesoporosity in zeolites further amplify catalytic efficiency. Overall, we demonstrate that Ni nanoparticles may perform as a hydrogenating metal in the same manner as noble metals such as Pt and Pd perform in hydrodesulfurization. We discuss some of the probable reasons for such performance and remark on the role of Ni in hydrotreatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interplay Between Ni and Brønsted and Lewis Acid Sites in the Hydrodesulfurization of Dibenzothiophene

Valderrama‐Zapata,

García‐Sánchez,

Vargas‐Montañez

et al. 2024

ChemPhysChem

View full text Add to dashboard Cite

show abstract

“…[16,18,19,[21][22][23][24][25][26] The direct desulfurization of dibenzothiophene is kinetically dominant over conventional -Al2O3 supported Ni-MoS2 and Co-MoS2 catalysts and even over unconventional noble metal promoted MoS2 catalysts. [26][27][28][29][30][31][32][33][34][35] Accordingly, it is generally agreed that MoS2 is the active phase of the catalysts and that secondary metals such as Ni, Co, and even noble metals essentially act as promoters of the MoS2. However, the role and functionalities of the metallic promoters is still not fully understood despite extensive experimental [26-34,36,37][38,39] and theoretical efforts.…”

Section: Introductionmentioning

confidence: 99%

Catalytic performance of supported Ni in the hydrodesulfurization of dibenzothiophene

Valderrama-Zapata,

García-Sánchez,

Vargas-Montañez

et al. 2023

Preprint

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To reduce pollution, sulfur, nitrogen, and other heteroatoms are removed from fuels by hydrotreatment (HDT). Conventional HDT catalysts are based on Ni-MoS2 phases dispersed over -Al2O3. Despite the myriad of papers studying these catalysts, it is somehow surprising to learn that the role of Ni in these catalysts is not yet fully understood. Most literature considers that Ni is either converted to some form of catalytically inactive nickel sulfide or that it mixes with MoS2 to act as a strong catalytic promoter. In this work, we focused on analyzing whether well-dispersed supported nickel nanoparticles can be active in the hydrodesulfurization of dibenzothiophene; one of the most refractory molecules composing diesel and marine fuels. We dispersed nickel using the principles of the strong electrostatic adsorption (SEA) method over silica (~neutral acidity), Al2O3 (Lewis acidity), H+-Y zeolite (Brönsted-Lewis acidity), and microporous-mesoporous H+-Y zeolite (similar Brönsted-Lewis acidity than its microporous counterpart). The results showed that Ni nanoparticles are catalytically active in the hydrodesulfurization of DBT and that zeolites provide them with long-term stability. In addition, using SEA impregnation and providing mesoporosity to the zeolite improved the catalytic performance. Overall, we demonstrate that Ni nanoparticles may behave in the same manner as noble metals such as Pt, Pd, and Ir behave in hydrodesulfurization. We discuss some of the probable reasons for such behavior and remark on the role of Ni in hydrotreatment.

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Effect of Pore Structure on the Performance of Mo-Ni Catalysts for Petroleum Resin Hydrogenation

Niu,

Shi,

Sun

et al. 2024

Catal Lett

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Bifunctional NiMo/HY-γ-Al2O3 catalysts for an effective production of ultra-low sulfur diesel

Cited by 5 publications

References 31 publications

Interplay Between Ni and Brønsted and Lewis Acid Sites in the Hydrodesulfurization of Dibenzothiophene

Interplay Between Ni and Brønsted and Lewis Acid Sites in the Hydrodesulfurization of Dibenzothiophene

Catalytic performance of supported Ni in the hydrodesulfurization of dibenzothiophene

Effect of Pore Structure on the Performance of Mo-Ni Catalysts for Petroleum Resin Hydrogenation

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