Desulfurization of diesel using ion-exchanged zeolites

Bhandari, Vinay M.; Ko, Chang Hyun; Park, Jung-Geun; Han, Sang‐Sup; Cho, Soon‐Haeng; Kim, Jong‐Nam

doi:10.1016/j.ces.2005.11.015

Cited by 152 publications

(78 citation statements)

References 19 publications

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“…[4] As already known, the high-boiling bezothiophene (BT), dibezothiophene (DBT), and their derivatives are often present in diesel along with other compounds, and mercaptans, sulfides, disulfides, and thiophenes are present in gasoline. [5] Unfortunately, HDS was reported not to be very efficient for removing BT, DBT, and their derivatives. [1,5] Indeed, the expensive running costs in addition to the inability of HDS for efficient removal of BT and DBT had convinced many researchers to find alternatives to the HDS process.…”

Section: Introductionmentioning

confidence: 99%

“…[5] Unfortunately, HDS was reported not to be very efficient for removing BT, DBT, and their derivatives. [1,5] Indeed, the expensive running costs in addition to the inability of HDS for efficient removal of BT and DBT had convinced many researchers to find alternatives to the HDS process. Recently, adsorption of BT and DBT at regular conditions by different kinds of materials has received great attention in the literature and the results proved that BT and DBT are selectively removed from diesel.…”

Section: Introductionmentioning

confidence: 99%

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Manganese‐Loaded Activated Carbon for the Removal of Organosulfur Compounds from High‐Sulfur Diesel Fuels

Al-Ghouti

Al‐Degs

2014

Energy Tech

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The adsorptive capacity of activated carbon (AC) is significantly enhanced toward weakly interacting organosulfur compounds (OSC) from sulfur‐rich diesel fuel. Sulfur compounds are selectively removed from diesel after surface modification by manganese dioxide (MnO2). A selective surface for OSC removal was created by loading MnO2 on the surface; π‐complexation between the partially filled d‐orbitals of Mn4+ and the S atom is the controlling mechanism for OSC removal. Principal component analysis (PCA) of adsorption data indicated the significance of the Mn–AC mass and the temperature as experimental parameters according to the following correlation: OSC adsorption (mg Sg−1)=3.94 (mass)−0.06 (part. diam.)−3.28 (temp)+0.02 (conc.). The kinetics of OSC adsorption confirmed that OSC removal by Mn–AC is a fast process in which 66 % of the surface is filled in 30 min. Kinetic data were best fitted by pseudo‐first‐ and second‐order models compared to diffusion‐based models. Surface and pore diffusion has only a minor role in the process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Manganese‐Loaded Activated Carbon for the Removal of Organosulfur Compounds from High‐Sulfur Diesel Fuels

Al-Ghouti

Al‐Degs

2014

Energy Tech

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“…As can be seen from Table 2, the sulfur breakthrough capacities of the regenerated adsorbent accounted for 98.4%, 97.8% of the original one and the sulfur saturation capacities recovered 98.8%, 97.4% of the original one, respectively. As is known, the aromatics have a great influence on the breakthrough capacity of adsorbent based on π-complexation in the desulfurization of transportation fuels containing 4,6-DMDBT (Bhandari, et al, 2006). In our experiment, the sulfur breakthrough capacity per gram of substrate changed from 4.64 mg S to 4.59 mg S and 4.51 mg S when the aromatics went up from 0% to 20% to 100%.…”

Section: Desulfurization Of 46-dmdbt Model Fuelsmentioning

confidence: 66%

Deep removal of 4,6-dimethyldibenzothiophene from model transportation diesel fuels over reactive adsorbent

Wang

2012

Braz. J. Chem. Eng.

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-This paper presents a new reactive adsorbent used to effectively remove 4,6-dimethyldibenzothiophene (4,6-DMDBT) from model transportation diesel fuels. This reactive adsorbent was composed of formaldehyde, phosphotungstic acid and mesoporous silica gel. The experiment was based on an assumed condensation reaction of 4,6-DMDBT with formaldehyde using phosphotungstic acid as catalyst in pore spaces. The effect of temperature and the amount of formaldehyde and phosphotungstic acid loaded on the substrate were investigated in a batch system. In the breakthrough experiment, three different model diesel fuels containing 1000 mg/kg 4,6-DMDBT were pumped through a fixed-bed reactor packed with reactive adsorbent at constant temperature and atmospheric pressure, respectively. The experimental results showed that sulfur-free model fuel was obtained at 80°C despite the presence of aromatics. The sulfur capacity of regenerated reactive adsorbent was almost totally recovered.

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“…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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Desulfurization of diesel using ion-exchanged zeolites

Cited by 152 publications

References 19 publications

Manganese‐Loaded Activated Carbon for the Removal of Organosulfur Compounds from High‐Sulfur Diesel Fuels

Manganese‐Loaded Activated Carbon for the Removal of Organosulfur Compounds from High‐Sulfur Diesel Fuels

Deep removal of 4,6-dimethyldibenzothiophene from model transportation diesel fuels over reactive adsorbent

Estudo da adsorção de compostos sulfurados empregando zeólitas contendo zinco

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