Gasoline desulfurization by catalytic alkylation over silica-supported heteropolyacids: From model reaction to real feed conversion

Arias, María Trinidad García; Laurenti, D.; Geantet, Christophe; Vrinat, M.; Itou, Hideyuki; Yoshimura, Y.

doi:10.1016/j.cattod.2007.08.017

Cited by 50 publications

(23 citation statements)

References 17 publications

(21 reference statements)

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“…1. Although the reaction of alkylation have reported at lower temperature that could be taken place, it could not act effective on high sulfuric content gasoline [13]. While the temperature below 140°C, the conversion of thiophene is no more than 57.5%.…”

Section: The Effect Of Reaction Temperature On Conversion Of Thiophenementioning

confidence: 98%

“…Several works had been investigated about the OATS zeolites catalysts, such as the Hb, MCM-41, MCM-22 [11][12][13]. However, the activity of the acid catalyst and the alkylation conditions are hardly to be chosen which will lead to the other competitive reactions, the aromatics alkylation, since they could decrease the selectivity of the OATS and increase the losses in gasoline yield.…”

Section: Introductionmentioning

confidence: 99%

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Study on Olefin Alkylation of Thiophenic Sulfur in FCC Gasoline Using La2O3-Modified HY Zeolite

et al. 2008

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HY zeolite modified by La 2 O 3 on olefin alkylation of thiophenic sulfur in fluid catalytic cracking (FCC) gasoline was studied in the micro fixed-bed reactor. Reaction pressure 1.5 MPa, reaction temperature 180°C, WHSV 3.5 h -1 , using HY zeolite modified by 2% La 2 O 3 , the conversion of thiophene sulfur promoted nearly 10% with good selectivity, comparing with no-modified by La 2 O 3 . Acidity of modification of HY zeolite with La 2 O 3 was tested in Pyridine-IR, it showed that increasing the amount of weak Bronsted (B) acid and the ratio of total B acid with total Lewis (L) acid could strengthen the hydrogen transfer activity of the catalyst, which leaded to improving the capacity of thiophene alkylation. The X-ray diffraction (XRD) results showed that the structure of catalysts could be optimized by loaded proper amount of La 2 O 3 for promoting the acidic properties of HY zeolite.

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Section: The Effect Of Reaction Temperature On Conversion Of Thiophenementioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Study on Olefin Alkylation of Thiophenic Sulfur in FCC Gasoline Using La2O3-Modified HY Zeolite

et al. 2008

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“…However, the increment of conversion was limited. It showed that mono-olefins also reacted with thiophene [9,12], which led to an improvement of conversion of thiophene. Due to the higher reaction activity of diene than mono-olefins [8], the conversion of thiophene only had a slight increase when the olefin was introduced to the system.…”

Section: Alkylation Performance Of Different Kind Of Thiophenic Sulfurmentioning

confidence: 99%

“…Many acidic catalysts are proposed, with either Brunsted or Lewis acidity, including various zeolites (b-zeolite, MCM-22, MCM-41, USY,…), phosphoric acid on kieselguhr, H 3 PW 12 O 40 /Fe 2 O 3 , etc. [7,[9][10][11][12]. However, the acid catalyst causes easily the other competitive reactions under the alkylation conditions, such as the aromatics alkylation, polymerization of olefins or diene, over-alkylation of thiophene and so on.…”

Section: Introductionmentioning

confidence: 99%

The performance of benzenesulfonic acid catalyst on the alkylation of thiophenic sulfur

et al. 2015

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Catalytic performance of benzenesulfonic acid was investigated for alkylation of thiophenic sulfur compounds with diene. The alkylates were confirmed by gas chromatography-mass spectrometry technique. The reaction conditions were optimized as follows: temperature is 85°C, catalyst/feed weight ratio is 10 % and time is 80 min. Under the conditions, the conversion of thiophene was nearly 73 %. The catalyst exhibited some recycle-use performance. The catalytic activity could be maintained by addition of the fresh catalyst periodically and quantitatively.

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“…This process is used to convert thiophene, benzenethiophene, dibenzothiophene and 4,6-dimethyldibenzothiophene into sulfones and sulfoxides in presence of oxidizing agent and sulfones and sulfoxides are easily separated by extraction with polar solvent [16][17][18][19]. The ODS process widely studied in various systems, such as organic acid [20], heteropolyoxo-metalates [21], ionic liquid [22,23], molecular sieve [24,25] and photocatalysts [26], heteropoly acid (HPA) catalysts [27][28][29], HPA catalysts, especially those having the keggin structure, have been determined to be very effective for the oxidation of sulfur containing compounds in a liquid-liquid two phase system. Li et al [30] reported mesoporous silica pillared clay incorporated with phosphotungstic acid.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Ammonium Salt of Molybdenum Heteropoly Acid Supported Silica for Oxidative Desulfurization of Benzothiophene, Dibenzothiophene and 4,6-Dimethyldibenzothiophene in Model Oil

Pant¹,

Thakur²,

Lal³

2017

Asian J. Chem.

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An ammonium salt of molybdenum heteropoly acid was loaded on silica support (HPA-SiO2), used as catalyst in oxidative desulfurization for removing benzothiophene (BT), dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) from model oil. The structural properties of prepared catalyst were studied by using various analytical techniques; Fourier transforms infrared spectroscopy , X-ray diffraction, scanning electron microscopy and thermogravimetric analysis. The results showed that the ammonium salt of molybdenum heteropoly acid highly dispersed on SiO2. The final catalyst exhibits good catalytic activity of oxidative desulfurization. The 94.6 % of thiophene compounds of the model oil were removed under optimal conditions; temperature at 80 °C, reaction time 100 min. The oxidation is decreased in order of DBT > 4,6-DMDBT > BT.

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Gasoline desulfurization by catalytic alkylation over silica-supported heteropolyacids: From model reaction to real feed conversion

Cited by 50 publications

References 17 publications

Study on Olefin Alkylation of Thiophenic Sulfur in FCC Gasoline Using La2O3-Modified HY Zeolite

Study on Olefin Alkylation of Thiophenic Sulfur in FCC Gasoline Using La2O3-Modified HY Zeolite

The performance of benzenesulfonic acid catalyst on the alkylation of thiophenic sulfur

Catalytic Performance of Ammonium Salt of Molybdenum Heteropoly Acid Supported Silica for Oxidative Desulfurization of Benzothiophene, Dibenzothiophene and 4,6-Dimethyldibenzothiophene in Model Oil

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