Dibenzothiophene hydrodesulfurization with NiMo and CoMo catalysts supported on niobium-modified MCM-41

Méndez, Franklin J.; Franco-López, Oscar E.; Bokhimi, Xim; Solís-Casados, Dora Alicia; Escobar‐Alarcón, L.; Klimova, Tatiana

doi:10.1016/j.apcatb.2017.07.079

Cited by 105 publications

(37 citation statements)

References 70 publications

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“…The slab length and stacking layers of MoS 2 were statistically analyzed by about 15 micrographs, including 200 particles for each catalyst. The average slab length and stacking layers of MoS 2 were calculated according to Equations (1) and (2) [32,33], and The dispersion of Mo atoms on the edge surface of the MoS 2 crystals (f Mo ) was calculated by Equation (3) [34,35]:…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

Acid Modification of the Unsupported NiMo Catalysts by Y-Zeolite Nanoclusters

Dong

Yin

et al. 2019

Crystals

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Unsupported NiMo catalyst has high hydrogenation activity due to its high active site distribution. However, low specific surface area and pore distribution greatly limit the efficient utilization of the active components. The Y-zeolite nanoclusters were hydrothermally synthesized and introduced into the unsupported NiMo catalysts from a layered nickel molybdate complex oxide. The XRD, N2 adsorption-desorption, FT-IR, Py-IR, SEM, NH3-TPD, and TEM were used to characterize all catalysts. The dibenzothiophene (DBT) hydrodesulfurization (HDS) reaction was performed in a continuous high pressure microreactor. The results showed that the specific surface area, pore volume, and average pore size of the unsupported NiMo catalysts were greatly increased by the Y-zeolite nanoclusters, and a more dispersed structure was produced. Furthermore, the Lewis acid and total acid content of the unsupported NiMo catalysts were greatly improved by the Y-zeolite nanoclusters. The HDS results showed that the unsupported NiMo catalysts modified by the nanoclusters had the same high desulfurization efficiency as the unmodified catalyst, but had more proportion of direct desulfurization (DDS) products. The results offer an alternative to reducing hydrogen consumption and save cost in the production of ultra clean diesel.

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Section: Characterization Of Catalystsmentioning

confidence: 99%

Acid Modification of the Unsupported NiMo Catalysts by Y-Zeolite Nanoclusters

Dong

Yin

et al. 2019

Crystals

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“…Currently, the sulfur content in transport oil is limited to be no more than 10 ppm [7,8] , and the value in fuel cell is more stringent, which is required to be lower than 60 ppb [9] . Industrially, the sulfur compounds in fuel oils are generally removed by hydrodesulfurization (HDS), which is realized at high reaction temperature and operating pressure [10] , and hydrogen is always required in HDS process [11] . All these reaction conditions make HDS a relatively high-cost technology [12] .…”

Section: Introductionmentioning

confidence: 99%

3D-printing of integrated spheres as a superior support of phosphotungstic acid for deep oxidative desulfurization of fuel

Zhu

Chen

et al. 2020

Journal of Energy Chemistry

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“…The most of them are based on the Al-containing MCM-41-derivatives, which has been used as support for HDT catalysts [17,18]. Transition metal substituted MCM-41 by, e.g., Zr [19], Ti [20] or Nb [21] have been less studied than Al-containing MCM-41, but have shown some potential applications for hydrotreatment reactions.…”

Section: Introductionmentioning

confidence: 99%

MCM-41-supported vanadium catalysts structurally modified with Al or Zr for thiophene hydrodesulfurization

et al. 2019

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Vanadium catalysts supported on Al(Zr)-MCM-41-type materials were prepared by impregnation. Textural and structural properties, elemental composition and electronic structure were determined by N 2 physisorption, small-angle XRD, SEM-EDX and UV-vis DRS, respectively. Al-containing materials showed mostly of Al framework and a small fraction of Al extra-framework species. Zr-containing materials presented almost exclusively small clusters of Zr x O y covering the MCM-41 matrix. Vanadium catalysts, showed the presence of isolated V 5+ species and to a lesser extent polymeric chains likely as small crystallites of V 2 O 5. The catalytic results revealed that VAlM30 catalyst, characterized by a Si/Al atomic ratio of 30, was the most active in thiophene hydrodesulfurization, which could be associated to better textural properties and high dispersion of the vanadium species.

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Dibenzothiophene hydrodesulfurization with NiMo and CoMo catalysts supported on niobium-modified MCM-41

Cited by 105 publications

References 70 publications

Acid Modification of the Unsupported NiMo Catalysts by Y-Zeolite Nanoclusters

Acid Modification of the Unsupported NiMo Catalysts by Y-Zeolite Nanoclusters

3D-printing of integrated spheres as a superior support of phosphotungstic acid for deep oxidative desulfurization of fuel

MCM-41-supported vanadium catalysts structurally modified with Al or Zr for thiophene hydrodesulfurization

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