Adsorption of benzothiophene on Y zeolites investigated by infrared spectroscopy and flow calorimetry

Jiang, Ming; Ng, Flora T. T.

doi:10.1016/j.cattod.2006.06.034

Cited by 64 publications

(46 citation statements)

References 36 publications

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“…Zeolites, alumina, silica and activated carbon are impregnated with various transition metals such as Cu; Ni; Ag; Zn; Fe; and Pd, to prepare adsorbents with higher capacities for TC removal from commercial and model fuels [8,11,14,16,[20][21][22][23][24][25][26]. Enhanced TC adsorption of several metal-impregnated adsorbents is explained by specific interactions (i.e., chemical interactions) between the metals and thiophenic molecules [8,12,14,20,21,[31][32][33]. Adsorbent pore geometry is also an important factor in TC adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption processes are some of the most economically attractive methods because of the straightforward operating conditions and availability of inexpensive and re-generable adsorbents including zeolites, metal-based adsorbents, silica, alumina, and activated carbon [8][9][10][11][12][13][14][15][16][17][18][19]. Adsorbents are modified by different treatment methods, including metal impregnation and oxidation, to enhance their affinities for the removal of TC from liquid fuels [20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…Adsorbents are modified by different treatment methods, including metal impregnation and oxidation, to enhance their affinities for the removal of TC from liquid fuels [20][21][22][23][24][25][26][27][28][29][30]. Zeolites, alumina, silica and activated carbon are impregnated with various transition metals such as Cu; Ni; Ag; Zn; Fe; and Pd, to prepare adsorbents with higher capacities for TC removal from commercial and model fuels [8,11,14,16,[20][21][22][23][24][25][26]. Enhanced TC adsorption of several metal-impregnated adsorbents is explained by specific interactions (i.e., chemical interactions) between the metals and thiophenic molecules [8,12,14,20,21,[31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Thiophenic Compounds from Model Diesel Fuel Using Copper and Nickel Impregnated Activated Carbons

2012

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Adsorption of sulfur compoundsby porous materials is an effective way to produce cleaner diesel fuel.In this study, adsorption of refractory thiophenic sulfur compounds, i.e., benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) in single-solute systems from n-hexane solutions onto metal-impregnated activated carbons was investigated. A hydrogen-treated activated carbon fiber was selectively loaded with Ni, NiO, Cu, Cu 2 O, and CuO species to systematically assess the impact of each metal species on the adsorption of thiophenic compounds (TC). Metal-loaded adsorbents had the same total metal contents and similar microporosities, but contained different types of copper or nickel species. All metal-loaded adsorbents showed enhanced adsorption of tested TC. Cu 2 O-or NiO-loaded adsorbents exhibited the highest uptakes, due to more specific interactions between Cu + or Ni 2+ species and TC molecules. The theoretical monolyer coverage of TC on the exposed Cu + sites was estimated and compared with that calculated from the experimental data. Results suggested catalytic conversion of TC molecules to other compounds on the Cu + sites, followed by adsorption of reaction products onto the carbon surface or multilayer accumulation of TC molecules on the Cu + sites. TC adsorption uptake of the majority of adsorbents followed the order of: 4,6-DMDBT > DBT > BT due to higher intensity of specific and non-specific interactions of larger TC molecules with adsorbents.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of Thiophenic Compounds from Model Diesel Fuel Using Copper and Nickel Impregnated Activated Carbons

2012

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“…Os anéis tiofeno interagem com os cátions da zeólita formando complexos-π através da doação eletrônica σ-π. 6 Ambas zeólitas adsorvem quantidades similares de dibenzotiofeno e não se observa influência da estrutura zeolítica, como observado para o benzotiofeno.…”

Section: Testes De Adsorção Do Dibenzotiofenounclassified

“…2 Ainda, sabe-se que alguns metais como, por exemplo, o zinco apresentam afinidade com o S, formando compostos complexos que propiciam a adsorção de compostos sulfurados. Na literatura encontram-se trabalhos empregando zeólitas com Cu, [3][4][5][6][7] Ni, [3][4][5][6] Ag, 3,5 Zn, [3][4][5] Fe 4,5 para adsorção de compostos sulfurados como benzotiofeno, dibenzotiofeno, tiofeno, entre outros. Também há trabalhos empregando zirconia, 8 sílicas mesoporosas, 9 zeólitas sintetizadas a partir de cinzas de carvão, 10 zeólitas sem a incorporação de metais 11,12 e zeólitas com substituição isomórfica de Ga na estrutura.…”

Section: Introductionunclassified

Estudo da adsorção de compostos sulfurados empregando zeólitas contendo zinco

Malvesti¹,

Mignoni²,

Scherer³

et al. 2009

Quím. Nova

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Recebido em 22/7/08; aceito em 11/2/09; publicado na web em 3/7/09 STUDY OF ADSORPTION OF SULPHUR COMPOUNDS EMPLOYING ZEOLITES CONTAINING ZINC. This paper deals with an adosrption of sulphur compounds employing zeolites containing zinc. The zeolites employed were commercial NaY and Beta. The zinc was incorporated in three levels: 0.5; 1.0 and 5%. The sulphur compounds studied were benzothiophene and dibenzothiofene. The results showed that both zeolites can be employed for adsorption of benzothiophene and dibenzothiophene. The Zn incorporation (0.5%) promotes an increase in zeolites adsorption ability. The DBT adsorbs more than BT, probably because it strongly interacts with zeolite structure. The BT adsorbs more in NaY than in beta probably because the NaY zeolite has a high intern volume. This is not observed for DBT.Keywords: sulphur compounds; zeólitas; adsorption. INTRODUÇÃOA presença de compostos sulfurados em frações de petróleo é altamente indesejável devido sua ação corrosiva e poluição atmosférica, promovida por gases prejudiciais ao meio ambiente, gerados durante a combustão.Assim, a necessidade de emissões cada vez mais limpas resulta na constante busca de redução de enxofre nos combustíveis. Durante o processo de combustão, o enxofre reage com o oxigênio para formar SO 2 e SO 3. O SO 3 , por sua vez, a partir de sua reação com H 2 O forma o H 2 SO 4 , que é extremamente nocivo às partes metálicas de equipamentos podendo levar a altíssimas taxas de corrosão e formação de chuva ácida.

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Bioadsorptive Desulfurization of Liquid Fuels

2018

Biodesulfurization in Petroleum Refining

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Adsorption of benzothiophene on Y zeolites investigated by infrared spectroscopy and flow calorimetry

Cited by 64 publications

References 36 publications

Adsorption of Thiophenic Compounds from Model Diesel Fuel Using Copper and Nickel Impregnated Activated Carbons

Adsorption of Thiophenic Compounds from Model Diesel Fuel Using Copper and Nickel Impregnated Activated Carbons

Estudo da adsorção de compostos sulfurados empregando zeólitas contendo zinco

Bioadsorptive Desulfurization of Liquid Fuels

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