A Study on Selective Catalytic Oxidation Desulfurization of Thiophene in Imitation Gasoline with Ti-MCM-41/H2O2·HCOOH

Yong, Xu; Shen, Benxian; Xu, Xian Lun; Zhang, X.-F.; Zhao, Jigang

doi:10.1080/15567031003614557

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…The linearity of the Arrhenius plots was examined to determine the activation energy, which was E a = 52.4 kJ mol –1 . The activation energy in this system was comparable with other Ti-based catalysts reported previously. ,,, …”

Section: Results and Discussionmentioning

confidence: 53%

“…The activation energy in this system was comparable with other Ti-based catalysts reported previously. 33,36,67,68 In the ECODS system, nearly 40% of DBT was extracted into the methanol phase, and then, the oxidation process was essentially carried out in methanol. However, the diffusion could exist throughout the biphasic reaction system.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Deep Oxidative Desulfurization of Model Fuels Catalyzed by Subnanosized Ti Oxoclusters

et al. 2022

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Oxidative desulfurization is a highly effective approach to decrease the sulfur content in transportation fuel and has become an attractive research topic in recent years. Herewith, we have developed a new kind of carboxylic acid-functionalized imidazolium-based ionic liquid-stabilized Ti oxoclusters via a solvothermal method. The as-synthesized Ti oxoclusters were investigated by elemental analysis, Fourier transform infrared spectroscopy, diffuse reflectance UV–vis, X-ray diffraction, thermogravimetric analysis, high-resolution transmission electron microscopy (HRTEM), and high-angle annular dark field–scanning TEM. Characterization indicated that Ti oxoclusters existed in the form of subnanosized structure and uniformly dispersed with an average particle size of ca. 1 nm due to the protection role of the ionic liquids (ILs). Especially, Ti oxo–HSO4 afforded a superior catalytic activity in the extraction and catalytic oxidative desulfurization process with MeOH as an extractant and H2O2 as an oxidant. The full removal of dibenzothiophene in model fuels was achieved within 30 min at 60 °C. Besides, the Ti oxoclusters were robust and exhibited high stability in consecutive catalytic recycles. The parent Ti oxoclusters treated with H2O2 can afford Ti–OOH species, which was catalytically active species. The anion HSO4 – in IL played a crucial role in the activation of Ti–hydroperoxo species by forming hydrogen bonds. This may provide a new insight into the construction of metal oxoclusters for oxidative desulfurization.

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Section: Results and Discussionmentioning

confidence: 53%

Section: ■ Results and Discussionmentioning

confidence: 99%

Deep Oxidative Desulfurization of Model Fuels Catalyzed by Subnanosized Ti Oxoclusters

et al. 2022

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“…Uji aktivitas katalitik desulfurisasi biasanya menggunakan senyawa model yang mampu mewakili senyawa sulfur yang terkandung didalam minyak bumi. Salah satu senyawa model yang sering digunakan adalah tiofen (Xu et al, 2011). Uji ativitas katalitik dipengaruhi antara lain oleh temperatur reaksi.…”

Section: Pendahuluanunclassified

Desulfurisasi Katalitik Tiofen Menggunakan Katalis CoMo/USY dalam Reaktor Batch

2018

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Telah dilakukan uji aktivitas katalis CoMo/USY pada reaksi desulfurisasi tiofen. Reaksi dilakukan pada reaktor sistem batch dengan tekanan gas N2 sebesar 1 bar gas N2 dan waktu reaksi selama 1 jam. Penelitian ini bertujuan untuk mengetahui pengaruh variasi temperatur dan variasi karakter katalis pada reaksi desulfurisasi tiofen. Product desulfurisasi dianalisis dengan GC-MS. Karakter kestabilan struktur katalis dilihat dengan analisis menggunakan instrument FT-IR. Hasil analisis terhadap uji aktivitas desulfurisasi menunjukkan bahwa pada rentang temperatur 200-300°C, rendemen bertambah dengan meningkatnya temperatur. Adapun efek karakter katalis terhadap aktivitas katalitiknya menunjukkan bahwa karakter katalis yang paling dominan adalah sifat keasaman. Katalis dengan keasaman tertinggi, yaitu katalis CoMo/USY, memiliki aktivitas tertinggi dalam desulfurisasi tiofen dengan rendemen produk sebesar 2,88%. Hasil analisis FT-IR terhadap katalis bekas menunjukkan bahwa struktur cukup stabil dan tidak ada pengotor yang terikat pada katalis.Catalytic Desulfurization of Thiophene using Como/Usy Catalyst in Batch Reactor. CoMo/USY catalyst activity has been tested for thiophene desulfurization reaction. The reaction was carried out in batch system reactor with N2 gas pressure of 1 bar and reaction time for 1 hour. This study aims to determine the effect of temperature variation and catalyst character variation in thiophene desulfurization reaction. The desulfurization products were analyzed by Gas Chromatography - Mass Spectra (GC-MS). The characters of structure catalyst were analyzed by Fourier Transform Infrared Spectroscopy (FT-IR). The results of the analysis of the desulfurization activity test showed that in the temperature range 200-300 °C, the yield raised with increasing temperature The analysis results of the desulfurization activity test showed that in the temperature range of 200-300°C, the yield raised with increasing temperature. The effect of the catalysts character on its catalytic activity shows that the most dominant character of the catalysts were its acidity. The highest acidity catalyst, CoMo/USY catalyst, has highest activity in thiophene thiophene with the product yield of 2,88%. The result of the FTIR analysis on used catalyst show that the structure was stable and no impurities were attached the catalyst.

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“…Salah satu senyawa model yang sering digunakan adalah tiofen (Xu et al, 2011). Uji ativitas katalitik dipengaruhi antara lain oleh temperatur reaksi.…”

Section: Pendahuluanunclassified

Desulfurisasi Katalitik Tiofen Menggunakan Katalis CoMo/USY dalam Reaktor Batch

2018

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ABSTRAKTelah dilakukan uji aktivitas katalis CoMo/USY pada reaksi desulfurisasi tiofen. Reaksi dilakukan pada reaktor sistem batch dengan tekanan gas N 2 sebesar 1 bar gas N 2 dan waktu reaksi selama 1 jam. Penelitian ini bertujuan untuk mengetahui pengaruh variasi temperatur dan variasi karakter katalis pada reaksi desulfurisasi tiofen. Product desulfurisasi dianalisis dengan Gas Chromatography -Mass Spectra (GC-MS). Karakter kestabilan struktur katalis dilihat dengan analisis menggunakan instrumen Fourier Transform Infrared Spectroscopy (FT-IR). Hasil analisis terhadap uji aktivitas desulfurisasi menunjukkan bahwa pada rentang temperatur 200-300°C, rendemen bertambah dengan meningkatnya temperatur. Pada penelitian telah berhasil menghidrogenasi tiofen, tetapi belum bisa menghilangkan kandungan sulfurnya. Adapun efek karakter katalis terhadap aktivitas katalitiknya menunjukkan bahwa karakter katalis yang paling dominan adalah sifat keasaman. Katalis dengan keasaman tertinggi, yaitu katalis CoMo/USY, memiliki aktivitas tertinggi dengan rendemen produk sebesar 2,88%. Hasil analisis FT-IR terhadap katalis bekas menunjukkan bahwa struktur cukup stabil dan tidak ada pengotor yang terikat pada katalis.Kata Kunci: desulfurisasi, katalis CoMo/USY, tiofen ABSTRACT Catalytic Desulfurization of Thiophene using CoMo/USY Catalyst in Batch Reactor. CoMo/USY catalyst activity has been tested for thiophene desulfurization reaction. The reaction was carried out in batch system reactor with N 2 gas pressure of 1 bar and reaction time for 1 hour. This study aims to determine the effect of temperature variation and catalyst character variation in thiophene desulfurization reaction. The desulfurization products were analyzed by Gas Chromatography -Mass Spectra (GC-MS). The characters of structure catalyst were analyzed by Fourier Transform Infrared Spectroscopy (FT-IR). The results of the analysis of the desulfurization activity test showed that in the temperature range 200-300 °C, the yield raised with increasing temperature. The analysis results of the desulfurization activity test showed that in the temperature range of 200-300°C, the yield raised with increasing temperature. The study has successfully hydrogenated thiophene, but has not been able to eliminate the sulfur content. The effect of the catalysts character on its catalytic activity shows that the most dominant character of the catalysts was its acidity. The highest acidity catalyst, CoMo/USY catalyst, has highest activity with the product yield of

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A Study on Selective Catalytic Oxidation Desulfurization of Thiophene in Imitation Gasoline with Ti-MCM-41/H₂O₂·HCOOH

Cited by 5 publications

References 5 publications

Deep Oxidative Desulfurization of Model Fuels Catalyzed by Subnanosized Ti Oxoclusters

Deep Oxidative Desulfurization of Model Fuels Catalyzed by Subnanosized Ti Oxoclusters

Desulfurisasi Katalitik Tiofen Menggunakan Katalis CoMo/USY dalam Reaktor Batch

Desulfurisasi Katalitik Tiofen Menggunakan Katalis CoMo/USY dalam Reaktor Batch

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