Influence of boron addition to alumina support by kneading on morphology and activity of HDS catalysts

Vatutina, Yu.V.; Климов, О. В.; Надеина, К.А.; Данилова, И. Г.; Gerasimov, E. Yu.; Носков, А. С.

doi:10.1016/j.apcatb.2016.06.018

Cited by 50 publications

(18 citation statements)

References 60 publications

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“…[35][36] The IR spectra in the ν BO region reveal the growth of new peaks at 1228 and 1373 cm À 1 that can be assigned to BO x species on the γ-Al 2 O 3 surface. [27,31] The peak positions and assignments are consistent with those reported by others for xBÀ Al 2 O 3 supports having similar B loadings. [21,27,31] The Brunauer-Emmett-Teller (BET) surface areas and average Barrett-Joyner-Halenda (BJH) pore sizes for the xBÀ Al 2 O 3 supports and Ni 2 P/xBÀ Al 2 O 3 catalysts are listed in Table 1.…”

Section: Characterization Of Xbà Al 2 O 3 Supportssupporting

confidence: 89%

“…[27,31] The peak positions and assignments are consistent with those reported by others for xBÀ Al 2 O 3 supports having similar B loadings. [21,27,31] The Brunauer-Emmett-Teller (BET) surface areas and average Barrett-Joyner-Halenda (BJH) pore sizes for the xBÀ Al 2 O 3 supports and Ni 2 P/xBÀ Al 2 O 3 catalysts are listed in Table 1. The surface areas of the xBÀ Al 2 O 3 supports changed only slightly with B loading (and are similar within the error of the measurement), while the average pore diameter increased from 6.5 nm for γ-Al 2 O 3 to~10 nm for the xBÀ Al 2 O 3 supports having B loadings � 0.4 wt %.…”

Section: Characterization Of Xbà Al 2 O 3 Supportssupporting

confidence: 89%

“…The IR spectrum for γ-Al 2 O 3 shows peaks at 3585, 3673, 3729 and 3769 cm À 1 that can be assigned to OH groups in different bonding configurations on the alumina support. [21,27,[29][30][31] As indicated by the IR spectra in the ν OH region of the 0.6BÀ Al 2 O 3 , 1.0BÀ Al 2 O 3 and 2.0BÀ Al 2 O 3 supports, the addition of B to the γ-Al 2 O 3 results in preferential loss of intensity of the peaks at 3729 and 3769 cm À 1 , which are associated with basic hydroxyl groups on the γ-Al 2 O 3 surface. [32] At the same time, a new peak grows in intensity at 3694 cm À 1 with increasing B loading; this peak is assigned to OH groups bonded to boron in the B 2 O 3 surface layer.…”

Section: Characterization Of Xbà Al 2 O 3 Supportsmentioning

confidence: 91%

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Hydrodesulfurization Properties of Nickel Phosphide on Boron‐treated Alumina Supports

et al. 2020

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The deep hydrodesulfurization (HDS) properties of nickel phosphide (Ni 2 P) on boron-modified alumina (xBÀ Al 2 O 3) supports having different B contents have been investigated. Ni 2 P precursors were prepared on the xBÀ Al 2 O 3 supports using hypophosphite (-hypo) or phosphate (-phos) as the P source and were subsequently reduced in flowing hydrogen. The 4,6dimethyldibenzothiophene HDS activities and turnover frequencies of the Ni 2 P/xBÀ Al 2 O 3 catalysts showed a strong dependence on B loading, with a maximum observed for the hypophosphite-and phosphate-based Ni 2 P/BÀ Al 2 O 3 catalysts corresponding to 0.8 wt % and 1.2 wt % B loadings, respectively. Based on XPS and IR spectral measurements, the optimal B loadings corresponded to~20 % B 2 O 3 coverage of the γ-Al 2 O 3 support and coincided with removal of the most basic hydroxyl groups on the alumina surface. At 573 K, a Ni 2 P/0.8BÀ Al 2 O 3-hypo catalyst was 2.5 times more active than a B-free Ni 2 P/Al 2 O 3-hypo catalyst, while a Ni 2 P/1.2BÀ Al 2 O 3-phos catalyst was 8.6 times more active than a B-free Ni 2 P/Al 2 O 3-phos catalyst. Overall, the hypophosphite-based Ni 2 P/BÀ Al 2 O 3 catalysts exhibited higher HDS activities than the phosphate-based Ni 2 P/BÀ Al 2 O 3 catalysts, in part due to smaller Ni 2 P particle sizes. The optimized catalysts, Ni 2 P/0.8BÀ Al 2 O 3-hypo and Ni 2 P/1.2BÀ Al 2 O 3-phos , were more active than a sulfided NiÀ Mo/Al 2 O 3 catalyst.

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Section: Characterization Of Xbà Al 2 O 3 Supportssupporting

confidence: 89%

Section: Characterization Of Xbà Al 2 O 3 Supportssupporting

confidence: 89%

Section: Characterization Of Xbà Al 2 O 3 Supportsmentioning

confidence: 91%

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Hydrodesulfurization Properties of Nickel Phosphide on Boron‐treated Alumina Supports

et al. 2020

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“…The introduction of additives such as F [106,107], Mg [108][109][110][111], B [112][113][114][115][116], P [86,[117][118][119], or Ga [76,[120][121][122][123][124] seems to correctly solve the migration phenomena, and to improve stability and lower the interaction between the active phase and the support. Nevertheless, other aspects, such as activity and selectivity should be carefully observed, since the surface and textural properties sometimes change drastically, and in most of the cases, large increases in the additive content, in fact, cause a decrease in activity [76,118].…”

Section: Inorganic Additivesmentioning

confidence: 99%

“…Typically, due to the nature of the additives, changes in surface acidity are reported [76,106,112]. For example, F, Mg, B, and Ga regulate the Bronsted acidity leading to changes in the electronic properties of MoS 2 and CoMoS sites, whether these changes affect or not the morphology of the sulfide phase [106,109,114,125]. In particular, Ga used as an additive of alumina support, modifies the general morphology of WS 2 slabs by changing the dispersion and increasing the promotion of the active phase almost to the maximum theoretical Ni promotion ratio [120].…”

Section: Inorganic Additivesmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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The literature from the past few years dealing with hydrodesulfurization catalysts to deeply remove the sulfur-containing compounds in fuels is reviewed in this communication. We focus on the typical transition metal sulfides (TMS) Ni/Co-promoted Mo, W-based bi- and tri-metallic catalysts for selective removal of sulfur from typical refractory compounds. This review is separated into three very specific topics of the catalysts to produce ultra-low sulfur diesel. The first issue is the supported catalysts; the second, the self-supported or unsupported catalysts and finally, a brief discussion about the theoretical studies. We also inspect some details about the effect of support, the use of organic and inorganic additives and aspects related to the preparation of unsupported catalysts. We discuss some hot topics and details of the unsupported catalyst preparation that could influence the sulfur removal capacity of specific systems. Parameters such as surface acidity, dispersion, morphological changes of the active phases, and the promotion effect are the common factors discussed in the vast majority of present-day research. We conclude from this review that hydrodesulfurization performance of TMS catalysts supported or unsupported may be improved by using new methodologies, both experimental and theoretical, to fulfill the societal needs of ultra-low sulfur fuels, which more stringent future regulations will require.

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Hydrodesulfurization over NiMo Catalysts Supported on Yolk‐shell Silica Materials with Controllable Cavity Size

Kong

Zhang

et al. 2022

ChemistrySelect

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Novel yolk-shell (YS) mesoporous silica materials with different cavity sizes were successfully synthesized. Aluminium was bridged into the yolk-shell framework of silica by a post synthesis method to improve the acidity of YS, namely Al-YS. The corresponding NiMo/Al-YS catalysts were also fabricated and used in the hydrodesulfurization (HDS) reaction of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). The NiMo/Al-YS catalyst with the cavity size of 154 nm (NiMo/Al-YS-154) exhibits the superior conversions of DBT (99.2 %) and 4,6-DMDBT (96.1 %) at 340 °C, 4.0 MPa, 10 h À 1 , highest k HDS (13.4 × 10 À 4 mol gÀ 1 h À 1 for DBT and 8.9 mol g À 1 h À 1 for 4,6-DMDBT) and highest TOF for DBT (3.7 h À 1 ) and 4,6-DMDBT (2.3 h À 1 ) among the investigated catalysts. The appropriate cavity size of NiMo/Al-YS-154 catalyst plays the key role in obtaining its superior HDS catalytic performance. Furthermore, the possible reaction networks of DBT and 4, 6-DMDBT HDS over NiMo/Al-YS-x catalysts were also presented.

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Influence of boron addition to alumina support by kneading on morphology and activity of HDS catalysts

Cited by 50 publications

References 60 publications

Hydrodesulfurization Properties of Nickel Phosphide on Boron‐treated Alumina Supports

Hydrodesulfurization Properties of Nickel Phosphide on Boron‐treated Alumina Supports

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Hydrodesulfurization over NiMo Catalysts Supported on Yolk‐shell Silica Materials with Controllable Cavity Size

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