Desulfurization and regeneration performance of heteropoly compound/ionic liquid solutions at high temperature

Liu, Xinpeng; Li, Junpeng; Wang, Rui

doi:10.1016/j.cej.2017.01.093

Cited by 37 publications

(27 citation statements)

References 50 publications

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“…To avoid the water loss in H 2 S desulfurization with aqueous protonated polyoxometalates, expand the range of temperature and improve the desulfurization efficiency, POM-ILs have been designed by dissolving protonated polyoxometalates in ILs for H 2 S oxidation desulfurization. ,, Wang and co-workers , found that both [Bmim]PMo 10 V 2 O 40 /BmimCl solutions at 200 °C and [CH 3 (CH 2 ) 15 N(CH 3 ) 3 ] 3 {PO 4 [MoO(O 2 ) 2 ] 4 }/[Bmim][HCO 3 ] solutions at 95 °C showed great H 2 S desulfurization performance, and they were ready to be regenerated by air. The oxygen of [Bmim]PMo 10 V 2 O 40 could be replaced by S 2– of H 2 S, and then, S 2– was oxidized to sulfur during the regeneration of [Bmim]PMo 10 V 2 O 40 .…”

Section: Oxidative Desulfurization Of H2s In Milsmentioning

confidence: 99%

Metal-Based Ionic Liquids in Oxidative Desulfurization: A Critical Review

Fen

Qazi

et al. 2021

Environ. Sci. Technol.

112

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Ionic liquids (ILs) as novel functional desulfurization materials have attracted increasing attentions. Metal-based ionic liquids (MILs) are classified into three types of metal chloride ILs, metal oxide ILs, and metal complex ILs based on the definition and basic structure of MILs in this critical review. On the basis of the properties of ILs such as structure designability, super dissolution performance, good thermal and chemical stability, nonflammability, and wide electrochemical window, MILs exhibit unique advantages on hydrophobicity, oxidation performance, and Bronsted−Lewis acidity. Therefore, MILs possess both the absorption and oxidation centers for the intramolecular adsorption and oxidation to improve the oxidative desulfurization (ODS) process. During the novel nonaqueous wet oxidative desulfurization process (Nasil), H 2 S can be oxidized into elemental sulfur with hydrophobic MILs, which can be regenerated by oxygen for recycle, to solve the problems of low sulfur capacity, low sulfur quality, and severe secondary pollution in the aqueous Lo-Cat wet oxidative desulfurization process. Another outstanding feature of MILs in ODS is biomimetic catalysis, which has the function of activating molecular oxygen and improving the oxidation performance. Metal oxide ILs and metal complex ILs are used in combination with hydrogen peroxide or oxygen with the existing water to generate a Fenton-like reaction to convert hydrophobic organic sulfur or SO 2 into hydrophilic sulfoxide/sulfone or sulfur acid, respectively. However, the corrosion of Cl − to the equipment and emulsification phenomenon in the extraction process of sulfoxide/sulfone separation still need further study. Furthermore, the promising strategies to construct highly efficient and green desulfurization processes for large-scale applications are provided.

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Section: Oxidative Desulfurization Of H2s In Milsmentioning

confidence: 99%

Metal-Based Ionic Liquids in Oxidative Desulfurization: A Critical Review

Fen

Qazi

et al. 2021

Environ. Sci. Technol.

112

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“…The residual H 2 S gas was absorbed by NaOH solution. The H 2 S concentration was detected by a TH-990s H 2 S gas analyzer (Liu et al, 2017c). The desulfurization performance of LnPMo solutions was mainly evaluated by H 2 S removal efficiency (η, %):…”

Section: H 2 S Absorption Experimentsmentioning

confidence: 99%

“…In Table 2, we compared the PrPMo with the previous desulfurization reagents. Liu et al (2017c) and Lütkehoff et al (1995) found that the desulfurization efficiency of the pure phosphotungstic acid (H 3 PW 12 O 40 ) and phosphomolybdic acid (H 3 PMo 12 O 40 ) was 20% and 80%, respectively. Ma et al (2014) and Wang et al (2003) used V and W to substitute the part elements of phosphomolybdic acid to form Fig.…”

Section: Desulfurization Mechanism and Desulfurization Productsmentioning

confidence: 99%

Desulfurization Performance of Rare Earth Mono-substituted Heteropoly Compounds

Pei

Wang

2019

Aerosol Air Qual. Res.

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In this study, a series of rare earth monosubstituted Dawson-type polyoxometalates were synthesized for highly effective removal of hydrogen sulfide (H 2 S). The unused, used and regenerated polyoxometalates were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results confirmed that K 17 [Pr(P 2 Mo 17 O 61) 2 ] could maintain a complete Dawson-type structure even after absorption and regeneration. H 2 S absorption study showed that K 17 [Pr(P 2 Mo 17 O 61) 2 ] had the remarkable desulfurization and regeneration capabilities. Optimization experiments showed that K 17 [Pr(P 2 Mo 17 O 61) 2 ] under the condition of low H 2 S concentration or high dosage of K 17 [Pr(P 2 Mo 17 O 61) 2 ] had the ideal desulfurization performance. An appropriate temperature of 25°C is necessary for high removal efficiency. The optimum pH value for desulfurization is 6.8. The desulfurization product was proved to be SO 4 2- .

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“…Thus, by definition EDS solvents must exhibit high chemical and thermal stability, non-toxicity, environmentally safety, and reusability. Because of these requirements, most conventional organic solvents used in liquid-liquid extractions cannot be applied in EDS (Li et al, 2017;Bhutto et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Ionic liquids (ILs), a novel class of green solvents, have recently attracted significant attention for their selective extraction of sulfur-containing compounds from diesel/gasoline (Liu et al, 2017, Julião et al, 2017.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Morpholine-Based Ionic Liquids for Extractive Desulfurization of Diesel Fuel

Fonseca

Silva

Sinfrônio

et al. 2019

Braz. J. Chem. Eng.

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Extractive desulfurization with ionic liquids has attracted significant attention from a growing number of scientists due to the current environmental restrictions on fuel. Protic ionic liquids (PILs) were synthesized via equimolar neutralization of morpholine and formic-based compounds. The obtained PILs were characterized by Fourier transform infrared and 1 H NMR spectroscopy and used as a promoter for the room temperature deep desulfurization of model oil and commercial B0S500 diesel. Extractive desulfurization of the model oil in n-octane showed that the alkyl chain length of the ionic liquid [Nmorph] + [HCOO]does not enhance the efficiency of dibenzothiophene (DBT) removal. Regardless, the [Morph] + [HCOO]-IL is the most promising candidate for extractive desulfurization. The best results were obtained using multistage extraction (n = 3) and a 1:1 volume ratio, resulting in a 99.44% removal rate of sulfur compounds. For commercial B0S500 diesel, extraction time significantly influenced the removal of sulfur species. For samples with multistage extraction and a 1:1 volume ratio, [Morph] + [HCOO]removed approximately 47.48% of the sulfur-containing compounds. The recycling study of [Morph] + [HCOO]suggests that the IL remains active for up to three operating cycles without losing efficiency.

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Desulfurization and regeneration performance of heteropoly compound/ionic liquid solutions at high temperature

Cited by 37 publications

References 50 publications

Metal-Based Ionic Liquids in Oxidative Desulfurization: A Critical Review

Metal-Based Ionic Liquids in Oxidative Desulfurization: A Critical Review

Desulfurization Performance of Rare Earth Mono-substituted Heteropoly Compounds

Synthesis of Morpholine-Based Ionic Liquids for Extractive Desulfurization of Diesel Fuel

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