Hydrodesulfurization of dibenzothiophene using CoMo/Al-HMS nanocatalyst synthesized by supercritical deposition

Alibouri, Mehrdad; Ghoreishi, S.M.; Aghabozorg, Hossein

doi:10.1016/j.supflu.2009.01.002

Cited by 27 publications

(6 citation statements)

References 59 publications

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“…These micrographs show that Ti-HMS is comprised of sphere-shaped particles, smaller than 1µm in diameter. This is in accordance with the previous findings of other authors [55]. These particles are organized in nonuniform agglomerates.…”

supporting

confidence: 94%

“…Moreover, the sharp nitrogen uptake at low relative pressures, found for both samples, indicate a well developed micropore region, which also added to valued to high surface area obtained. Another increase in the relative pressures range of p/p 0 =0.2 to 0.5, more pronounced for SC dried support, results from better developed mesopores region and therefore capillary condensation of nitrogen inside the pores occur [55]. Shift of framework confined mesopores filling to higher relative pressures found with this support indicates an increase in framework pore size, as well.…”

Section: N 2 Adsorption-desorption Isothermsmentioning

confidence: 67%

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Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support

Prokić-Vidojević¹,

Glišić²,

Orlović³

2017

Sci Tech Rev

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Textural characteristics of catalysts and catalysts supports are of a prime importance when it comes to their application in processing of high molecular weight compounds. Drying procedure is a key factor in preservation of wet gel properties. Hexagonal mesoporous silicas (HMS) doped with Ti-ions is finding a promising usage as heterogeneous catalysts support. In this paper, the effect of supercritical drying with excess solvent on the textural characteristics of Ti-HMS is addressed. HMS with Ti ions (Si/Ti atomic ratio of 40) is prepared using the sol-gel method. Dodecylamine is used as the structure directing surfactant (S) and TEOS and Titanium butoxide as the inorganic precursors (I). Specific surface area, mesoporosity and pore volume of the support dried by thermal evaporation of solvent in air and dried in excess of supercritical ethanol are compared. The results indicate that improved specific surface area and almost four times bigger value for mesopore volume are obtained using supercritical drying procedure.

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supporting

confidence: 94%

Section: N 2 Adsorption-desorption Isothermsmentioning

confidence: 67%

Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support

Prokić-Vidojević¹,

Glišić²,

Orlović³

2017

Sci Tech Rev

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“…In recent years, well-dispersed metal NPs supported various porous materials like CNTs, 10,16,[18][19][20] activated carbon, 21 alumina (Al 2 O 3 ) 12,22,23 and other matrixes 23,24 have been extensively prepared via a relatively novel preparation method, supercritical uid deposition (SFD) method, which was rst demonstrated by Watkins et al 25 in 1995. Supercritical uids (SCFs) exhibit a distinctive hybrid of gas-like and liquid-like properties.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of highly dispersed and nano-sized Ru catalysts supported on carbonaceous materials via supercritical fluid deposition

Zhang

Jiang

et al. 2016

RSC Adv.

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“…ReO 3 has assigned specific peaks at 2θ ~ 38°, 40°, 42.8°, 44° and 65°. HMS shows specific peaks in the region 2θ ~ 20-30°w hich corresponds to the amorphous state of HMS [19][20]. The catalysts have undergone structural changes after sulfurization, either by decreasing the peak intensity or by dropping the specific peaks, indicating that the present species has been amorphous, or crystallites are too small to record a RX signal.…”

Section: Catalysts Characterizationmentioning

confidence: 99%

Effect of Support on the Performance of CoMoRe Catalyst in Thiophene and Benzothiophene Hydrodesulfurization

Doukeh¹,

Bombos²,

Popovici³

et al. 2019

Rev. Chim.

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This work is aimed at selection of a suitable support for CoMoRe catalyst in hydrodesulfurization (HDS) of thiophenes. g-Al2O3 and g-Al2O3-HMS were used as a support for CoMoRe catalyst with 4%Co, 8%Mo and 0.5%Re loading. The metal loading was incorporated by using the pore volume impregnation method, employing aqueous solutions of cobalt (II) nitrate, ammonium molibdate and rhenium (VII) oxide. The catalysts were sulfided with dimethyl disulphide at 250 �C for 10 h and finally tested in the HDS reaction of thiophene and benzothiophene in different temperature and pressure conditions. The catalysts were characterized by determining the adsorption isotherms, the pore size distribution and the acid strengt, FTIR, XRD and S EM. T he catalyst supported on g - Al2O3 displayed higher activity than catalyst supported on g-Al2O3-HMS. The results suggest that activity is favoured by the suitable textural and acidic properties of the support.

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Hydrodesulfurization of dibenzothiophene using CoMo/Al-HMS nanocatalyst synthesized by supercritical deposition

Cited by 27 publications

References 59 publications

Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support

Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support

Controlled synthesis of highly dispersed and nano-sized Ru catalysts supported on carbonaceous materials via supercritical fluid deposition

Effect of Support on the Performance of CoMoRe Catalyst in Thiophene and Benzothiophene Hydrodesulfurization

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