Preparation of CuNaY zeolites with microwave irradiation and their application for removing thiophene from model fuel

Li, Xiaojuan; Zhang, Xingwang; Lei, Lecheng

doi:10.1016/j.seppur.2008.10.016

Cited by 35 publications

(6 citation statements)

References 32 publications

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“…The development of HDS process for the removal of sulfur content from diesel oil are previously reported using a conventional solvent, zeolite process (CuNaY zeolite, etc. ), and via a catalyst. − Other processes include use of highly active absorbent such as fly ash and γ-Al 2 O 3 . ,, The HDS process has worked well for the removal of thioles, sulfides, and cyclic sulfides .…”

Section: Introductionmentioning

confidence: 99%

Fast Solvent Screening for the Simultaneous Hydrodesulfurization and Hydrodenitrification of Diesel Oil Using Ionic Liquids

Ramalingam

Banerjee

2011

J. Chem. Eng. Data

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1-Ethyl-3-methylimidazolium [EMIM], 1-ethylpyridinium [EPY], 1-ethyl-1-methylpyrrolidinium [EPYRO], 4-ethyl-4-methylmorpholium [EMMOR], 1-ethyl-1-methylpiperidinium [EMPIP], and 1,2,4-trimethylpyrazolium [TMPYZO] based cations along with 25 anions have been investigated as possible solvents for the simultaneous hydrodesulfurization (HDS) and hydrodenitrification (HDN) of diesel oil at T = 298.15 K. The infinite dilution activity coefficient (IDAC) of thiophene (TS), benzothiophene (BTS), dibenzothiophene (DBTS), pyrrole (PYR), indole (IND), indoline (INDI), carbazole (CAR), benzocarbazole (BCAR), pyridine (PY), quinoline (QU), and benzoquinoline (BQU) was predicted via the quantum chemical based COSMO-RS (COnductor like Screening MOdel for Real Solvents) model. Subsequently, the selectivity and capacity at infinite dilution were used as indicators for the possible screening of ionic liquids (ILs). [EMMOR], [EMPYRO], and [EMPIP] based cations gave lesser activity coefficient values at infinite dilution as compared to [EMIM], [EPY], and [TMPYZO] based cations. It was noted that [DMP], [BTA], [OcSu], and [MSACN] anions, having a different electronegative atom such as N (nitrogen), O (oxygen), and S (sulfur), respectively, play a significant role in increasing the selectivity. High activity coefficients at infinite dilution values were observed for basic nitrogen compounds as compared to the nonbasic nitrogen compounds irrespective of the cation and anion. Evidently, [EMMOR] and [EPYRO] gave higher solvent capacity values at infinite dilution irrespective of the aromatic nitrogen and sulfur compounds.

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Section: Introductionmentioning

confidence: 99%

Fast Solvent Screening for the Simultaneous Hydrodesulfurization and Hydrodenitrification of Diesel Oil Using Ionic Liquids

Ramalingam

Banerjee

2011

J. Chem. Eng. Data

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“…In addition to the four new peaks mentioned above, the adsorbents after adsorbing the model gasoline-containing xylenes ( Fig. 5c-e) showed a new infrared band at 1497 cm −l , which can be attributed to the vibrations of the benzene ring of adsorbed xylenes (Li et al 2009;Qin et al 2014a). The differences between the adsorbents after absorbing different xylene isomers were detected in the range of 600-900 cm −1 (Fig.…”

Section: Analysis Of Ads Mechanismmentioning

confidence: 75%

“…However, a slight decrease in the peak intensity after the exchange process was also found because of the introduction of metal ions. This indicates that the metal ion-exchange with the parent NaY caused a certain extent of reduction in crystallinity (Li et al 2009). Additionally, no peaks of metal oxides were seen.…”

Section: Xrd and Semmentioning

confidence: 92%

Synthesis of highly active Cu(I)-Y(III)-Y zeolite and its selective adsorption desulfurization performance in presence of xylene isomers

Jiang

Chang³

2020

Pet. Sci.

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A bimetal-exchanged NaY zeolite (Cu(I)-Y(III)-Y) with a desirable adsorptive desulfurization (ADS) performance was prepared and characterized by means of X-ray diffraction, specific surface area measurements, X-ray fluorescence spectrometer, X-ray photoelectron spectroscopy, thermal gravity analysis and Fourier transform infrared spectroscopy. The effect of Y(III) ions on ADS in the presence of the xylenes was investigated. Results indicated that the ADS performance of Y(III)-Y is higher than that of most reported CeY. The Y(III)-based Cu(I)-Y(III)-Y demonstrated the higher breakthrough loading than those of reported Ce(III)/Ce(IV)-based transition metal Y zeolites, showing that Y(III) ions play a promoting role in improving the ADS selectivity. For Cu(I)-Y(III)-Y, a new strong S-M interaction (S stands for sulfur, while M stands for metal) active site was formed, which might be caused by the synergistic effect between Cu(I) and Y(III). The Cu(I)-Y(III)-Y, which combined the advantages of Cu(I)-Y and Y(III)-Y, is a kind of promising adsorbent. The breakthrough loading decreased in the order of Cu(I)-Y(III)-Y > Y(III)-Y > Cu(I)-Y, and the effect of xylene isomers on the sulfur removal was in the order of ortho-xylene > meta-xylene > para-xylene, which exhibited the same trend with the bond order of xylenes.

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“…The special effect is an interesting and often confusing phenomenon in many researches, such as microwave-assisted synthesis or preparation of organic compounds [9][10][11][12][13][14], microwave-enhanced molecules diffusion in polymeric materials [15,16] and microwave-assisted extraction or removal [17][18][19][20][21]. It is considered by many scholars that the light quantum (the quantum of electromagnetic radiation) of microwave has some special effects on reducing the Gibbs free energy of activation of reactions.…”

Section: Introductionmentioning

confidence: 99%

Effect of microwave irradiation on typical inorganic salts crystallization in membrane distillation process

Wang

Yin

et al. 2014

Journal of Membrane Science

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a b s t r a c tThis study is a continuation of our previous work on microwave-assisted membrane distillation. The crystal morphology of sodium chloride and calcium carbonate in the process of membrane distillation and microwave membrane distillation was investigated in this work. The effect of salt concentration on the ability of absorbing microwave of solution and the mass transfer of microwave membrane distillation were also analyzed. The results show that the ionic conduction is the main between two factors (ionic conduction and dipole rotation) which have effect on absorbing microwave. When the mass concentration of sodium chloride solution is up to 5%, the microwave energy absorbed by solution is almost five times as much as pure water. Moreover, the increase in salt concentration has no significant extra influence on the mass transfer of microwave membrane distillation. The crystallization experiments confirm that microwave irradiation do not affect membrane fouling or worsen it. The different effect of microwave irradiation on crystallization of two typical inorganic salts is observed in this study. For sodium chloride, the microwave heating leads to the decline of the total particle number, while the total deposition keeps constant and the size distribution of crystal particles becomes more uniform, compared with conventional heating. As for calcium carbonate, microwave irradiation not only increases the total deposition and total particle number, but also induces the crystals growth. Especially, it is found that microwave irradiation induces the crystals to grow toward aragonite. The ratios of the aragonite number to the total particle number increase from 28.0% and 56.5% to 81.1% and 85.8% at the two higher feed mass concentrations, respectively.

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Preparation of CuNaY zeolites with microwave irradiation and their application for removing thiophene from model fuel

Cited by 35 publications

References 32 publications

Fast Solvent Screening for the Simultaneous Hydrodesulfurization and Hydrodenitrification of Diesel Oil Using Ionic Liquids

Fast Solvent Screening for the Simultaneous Hydrodesulfurization and Hydrodenitrification of Diesel Oil Using Ionic Liquids

Synthesis of highly active Cu(I)-Y(III)-Y zeolite and its selective adsorption desulfurization performance in presence of xylene isomers

Effect of microwave irradiation on typical inorganic salts crystallization in membrane distillation process

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