Effect of modified carrier fluoride on the performance of Ni–Mo/Al2O3 catalyst for thioetherification

Zhao, Han; Ma, Zhuang; Wang, Chengbo; He, Chunyu; Ke, Ming; Jiang, Qi; Zhang, Song

doi:10.1007/s12182-020-00439-9

Cited by 6 publications

(4 citation statements)

References 23 publications

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“…And the tetravalent Mo ions mainly existing in the form of fully sulfurized MoS 2 , which is closely related with the naphthalene hydrogenation activity. , The binding energies for the Mo 3d 5/2 and 3d 3/2 of Mo 5+ corresponding to the incompletely sulfurized MoS x O y intermediates are located at 230.8 and 233.9 eV. The binding energies of Mo 6+ 3d 5/2 and 3d 3/2 appearing at 233.2 and 236.3 eV correspond to the unsulfurized MoO 3 . − Furthermore, the signal ascribed to S 2– is about at 226.9 eV.…”

Section: Results and Discussionmentioning

confidence: 93%

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Modification of Activated Carbon and Its Application in Selective Hydrogenation of Naphthalene

et al. 2022

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The MoS 2 /ACx catalyst for hydrogenation of naphthalene to tetralin was prepared with untreated and modified activated carbon (ACx) as support and characterized by X-ray powder diffraction, Brunauer−Emmett−Teller, scanning electron microscopy, temperature-programmed desorption of ammonia, Xray photoelectron spectroscopy, and scaning transmission electron microscopy. The results show that the modification of activated carbon by HNO 3 changes the physical and chemical properties of activated carbon (AC), which mainly increases the micropore surface area of AC from 1091 to 1209 m 2 /g, increases the micropore volume of AC from 0.444 to 0.487 cm 3 /g, increases the oxygen-containing functional groups of AC from 5.46 to 7.52, and increases the acidity of catalysts from 365.7 to 559.2 mmol/g. The modified catalyst showed good catalytic performance, and the appropriate HNO 3 concentration is very important for the modified of activated carbon. Among all the catalysts used in this study, the MoS 2 /AC3 catalyst could achieve the highest yield of tetralin. It can be attributed to the moderate acidity of the catalyst, reducing the cracking of hydrogenation products. Also, the proper hydrogenation activity of MoS 2 and the appropriate increase of oxygen-containing functional groups on the surface of modified activated carbon are beneficial to the dispersion of active components on the support, increasing the yield of tetralin. The catalytic performance of MoS 2 /AC3 is better than that of MoS 2 /Al 2 O 3 catalyst, and the two catalysts show different hydrogenation paths of naphthalene.

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Section: Results and Discussionmentioning

confidence: 93%

“…The binding energies of Mo 6+ 3d 5/2 and 3d 3/2 appearing at 233.2 and 236.3 eV correspond to the unsulfurized MoO 3 . 32 − 34 Furthermore, the signal ascribed to S 2– is about at 226.9 eV.…”

Section: Results and Discussionmentioning

confidence: 96%

Modification of Activated Carbon and Its Application in Selective Hydrogenation of Naphthalene

et al. 2022

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“…HRTEM analysis was carried out to determine the morphology and distribution of MoS 2 crystallites. The representative HRTEM images of sulfided catalysts are displayed in Figure , where black threads are ascribed to MoS 2 active species. , The average slab length ( L ̅) and stacking number ( N ̅) of active species on sulfided catalysts are illustrated in Figure , and the statistical results are listed in Table . Compared with the obtained bifunctional catalysts, the reference CoMo/Al 2 O 3 catalyst has the shortest average slab length and stacking number equivalent to 2.2 and 1.7 nm, respectively, resulting in the highest dispersion of active species ( D ).…”

Section: Resultsmentioning

confidence: 99%

Hydrotreatment of FCC Gasoline Catalyzed by CoMo Bifunctional Catalysts: The Effects of Acidity on Catalytic Performance

Chen

Xia

Zheng

et al. 2020

Ind. Eng. Chem. Res.

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The acidity of bifunctional catalysts is regarded as one of the most important factors for FCC gasoline hydrotreatment. To investigate the effects of acidity on catalytic performance, the CoMo/Al2O3 catalysts modified by MCM-41 and HZSM-5 were prepared by incipient wetness impregnation. The characterization results showed that adding molecular sieves changed the distribution of acid sites of catalysts and had a positive impact on forming longer MoS2 slabs with a slightly higher stacking number related to better hydrodesulfurization (HDS) performance. The results of catalytic performance indicated that 1-octene isomerization conversion increased from 4.13 to 33.97% with the increasing Brønsted acid site/Lewis acid site (BAS/Lewis acid sites (LAS)) ratio by presenting stronger BAS, resulting in the increasing selectivity of hydrodesulfurization/olefin hydrogenation (HDS/HYDO) from 0.89 to 5.41. However, when the BAS/LAS ratio surpassed 0.46 with the presence of weaker and stronger BAS, HDS efficiencies started decreasing. This understanding sheds light on designing hydrotreating catalysts to produce high-quality gasoline.

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“…However, conventional SAPO-11 has large submicron particles and a small external surface area (ESA), and it shows a good selectivity to mono-branched isomers but a poor selectivity to di-branched isomers in long-chain n-alkane hydroisomerization (Höchtl et al 2001;Chen et al 2017). Compared with mono-branched isomers, di-branched isomers with higher octane numbers can efficiently improve the gasoline quality (Chica and Corma 1999;Zhang et al 2017;Han et al 2020). The diameter of the Edited by Xiu-Qiu Peng di-branched isomers, such as 2,6-dimethylheptane (7.1 Å), is larger than the pore openings of (Akhmedov and Al-Khowaiter 2007).…”

Section: Introductionmentioning

confidence: 99%

n-Nonane hydroisomerization over hierarchical SAPO-11-based catalysts with sodium dodecylbenzene sulfonate as a dispersant

Wen

Wang

et al. 2021

Pet. Sci.

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To enhance the gasoline octane number, low-octane linear n-alkanes should be converted into their high-octane di-branched isomers via n-alkane hydroisomerization. Therefore, hierarchical SAPO-11-based catalysts are prepared by adding different contents of sodium dodecylbenzene sulfonate (SDBS), and they are applied in n-nonane hydroisomerization. When n(SDBS)/n(SiO2) is less than or equal to 0.125, the synthesized hierarchical molecular sieves are all pure SAPO-11, and as the SDBS content increases, the submicron particle size decreases, and the external surface area (ESA) increases. Additionally, these hierarchical SAPO-11 have smaller submicron particles and higher ESA values than conventional SAPO-11. When n(SDBS)/n(SiO2) is greater than 0.125, with increasing SDBS content (n(SDBS)/n(SiO2) = 0.25), the synthesized SAPO-11 contains amorphous materials, which leads to a decline in the ESA; with the further increase in SDBS content (n(SDBS)/n(SiO2) = 0.5), the products are all amorphous materials. These results indicate that in the case of n(SDBS)/n(SiO2) = 0.125, the synthesized SAPO-11 molecular sieve (S–S3) has the most external Brønsted acid centers and the highest ESA of these SAPO-11, and these advantages favor generation of the di-branched isomers in hydrocarbon hydroisomerization. Among these Pt/SAPO-11 catalysts, Pt/S–S3 displays the highest selectivity to entire isomers (83.4%), the highest selectivity to di-branched isomers (28.1%) and the minimum hydrocracking selectivity (15.7%) in n-nonane hydroisomerization.

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Effect of modified carrier fluoride on the performance of Ni–Mo/Al2O3 catalyst for thioetherification

Cited by 6 publications

References 23 publications

Modification of Activated Carbon and Its Application in Selective Hydrogenation of Naphthalene

Modification of Activated Carbon and Its Application in Selective Hydrogenation of Naphthalene

Hydrotreatment of FCC Gasoline Catalyzed by CoMo Bifunctional Catalysts: The Effects of Acidity on Catalytic Performance

n-Nonane hydroisomerization over hierarchical SAPO-11-based catalysts with sodium dodecylbenzene sulfonate as a dispersant

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