Amphiphilic heteropolyacid-based sulfonic acid-functionalised ionic liquids as efficient catalysts for biodiesel production

Li, M.; Lu, Ping; Ye, Changshen; Chen, Jie; Qiu, Ting

doi:10.1016/j.fuel.2023.129269

Cited by 12 publications

(5 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The addition of [EMIm]HSO 4 intensified the reaction of TOX synthesis from FA solution was also found . The acidity and polarity of acidic ILs are also different due to the different number of sulfonic acid groups. , They showed good catalytic performance in different reactions. − They may show different effects on the reaction of TOX synthesis from FA solution for their different properties. Therefore, the effects of introduced acidic ILs on the liquid reaction of TOX synthesis from FA solution are needed to be studied systematically, and the intensification mechanism of ILs on the reaction itself is also needed to be clarified.…”

Section: Introductionmentioning

confidence: 93%

Intensification Mechanism of Acidic Imidazole-Based Ionic Liquids on the Synthesis of 1,3,5-Trioxane Catalyzed by Sulfuric Acid

Yuan,

Zhang,

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The production of 1,3,5-trioxane (TOX) from formaldehyde (FA) solution is seriously limited by the reaction equilibrium. 1-Propyl-3-methylimidazolium bisulfate ([PMIm]HSO 4 ), 1-(3-sulfonic acid)propyl-3-methylimidazolium bisulfate ([PSMIm]HSO 4 ), and 1,3bis(3-sulfonic acid)propyl imidazolium bisulfate ([PS 2 Im]HSO 4 ) were, respectively, used as cocatalysts of H 2 SO 4 to intensify the TOX synthesis from FA solution. The results show that the intensification performance of ILs on the TOX synthesis was according to the following order: [PS 2 Im]HSO 4 > [PSMIm]HSO 4 > [PMIm]HSO 4 . The yield of TOX was increased from 13.84 to 16.95% with the addition of 0.5 mol [PS 2 Im]HSO 4 per kilogram of FA solution. DFT calculation and MD simulation were conducted, and the activity of water was measured to clarify the intensification mechanism. The results illustrated that the water activity had a strong influence on the TOX yield. In the three ILs, [PS 2 Im]HSO 4 has the highest dipole moment and the largest overall charged surface areas. It can form the most stable H-bonds with H 2 O molecules, resulting in the biggest decrease in the activity of water, thereby showing the best performance to shift the reversible reaction of TOX synthesis to right forward. The result provides a guidance for the development of new catalysts for TOX synthesis.

show abstract

Section: Introductionmentioning

confidence: 93%

Intensification Mechanism of Acidic Imidazole-Based Ionic Liquids on the Synthesis of 1,3,5-Trioxane Catalyzed by Sulfuric Acid

Yuan,

Zhang,

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…6 Whereas the use of homogeneous acid catalysts for FFAs and low-quality feedstock is a good idea for producing biodiesel, it is virtually nonreusability, equipment corrosion, and the generation of more wastewater. 7 Taking these aspects into consideration, developing efficient and stable heterogeneous acid catalysts has become a priority.…”

Section: Introductionmentioning

confidence: 99%

“…However, the use of alkaline catalysts is suitable only for high‐quality oils with low FFAs and low water content; otherwise, the saponification occurs, resulting in low conversion 6 . Whereas the use of homogeneous acid catalysts for FFAs and low‐quality feedstock is a good idea for producing biodiesel, it is virtually non‐reusability, equipment corrosion, and the generation of more wastewater 7 . Taking these aspects into consideration, developing efficient and stable heterogeneous acid catalysts has become a priority.…”

Section: Introductionmentioning

confidence: 99%

In situ impregnation of cobalt‐doped tungstophosphoric acid on MOF‐801 toward enhanced catalytic activity for esterification

Zhang,

Hu,

Chen

et al. 2024

Applied Organom Chemis

View full text Add to dashboard Cite

Development of an energy‐efficient and economical route is necessary for society to synthesize green biofuels. Herein, cobalt‐doped tungstophosphoric acid (Co‐HPW) is in‐situ impregnated in the Zr‐based metal–organic framework (MOF‐801) forming composite of Co‐HPW/MOF‐801. The chemical composition, morphology, and acidic sites of the Co‐HPW/MOF‐801 composite were analyzed through x‐ray diffractometer (XRD), Fourier transform infrared (FTIR), scanning electron microscope (SEM), energy‐dispersive x‐ray spectroscopy (EDS), thermogravimetric analysis (TG), N2 physisorption, ammonia temperature‐programmed desorption (NH3‐TPD), pyridine‐adsorbed infrared spectra (Py‐FTIR), and x‐ray photoelectron spectroscopy (XPS). The catalytic performance of the as‐synthesized catalyst was explored to catalyze esterification of lauric acid (LA) with methanol. The outcomes revealed that the Co‐HPW/MOF‐801 nanocatalyst achieved a high conversion of 86.3% under the optimized reaction condition (catalyst amount of 0.15 g, temperature of 100°C, time of 4 h, and methanol/LA molar ratio of 20:1). The excellent catalytical performance is mainly due to the large BET surface area, exposure of more active centers from available pore structure, and simultaneous possession of high Lewis and Brønsted acidity. Furthermore, the kinetic study revealed that the reaction process was kinetically controlled and the activation energy was found to be 42.1 kJ/mol. The results suggest that the synthesized Co‐HPW/MOF‐801 nanocatalyst is an environmental greenness, low cost, and suitable for easy scale‐up for the production of biofuels.

show abstract

“…The study of new hydrophobic catalysts is crucial for achieving esterification in green aqueous solvents. Currently, heterogeneous catalysts with Bronsted acidity, such as heteropolyacid, molecular sieves, and cation exchange resin, have attracted wide attention for the preparation of fatty acid esters by catalyzing reactions of fatty acids and alcohols [21][22][23][24]. For example, Zhang et al [23] reported a heteropolyacid/Ni-MOF composite catalyst to catalyze the formation of fatty acid methyl ester between fatty acids and methanol through an esterification reaction, and the synthesized catalyst exhibited good catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

The Green Synthesis of Biodiesel via Esterification in Water Catalyzed by the Phosphotungstic Acid–Functionalized Hydrophobic MCM–41 Catalyst

Li,

Shi,

Liang

et al. 2024

Catalysts

View full text Add to dashboard Cite

Biodiesel is a non-toxic and environmentally friendly fuel that is made from renewable biological sources. It can replace petrochemical diesel and has very broad application prospects. However, the main raw materials in biodiesel are animal and plant oils, which present the problems of high costs and a lack of resources. The current research primarily emphasizes the transesterification process, with comparatively less focus on the esterification of fatty acids. In this paper, a series of phosphotungstic acid (PTA)-functionalized hydrophobic MCM–41 catalysts, OTS–PTA–MCM–41(Cx), were synthesized and used to catalyze the esterification of long-chain fatty acids with methanol in water. The experimental results show that the yield of esterification reached a maximum when catalyzed by OTS–PTA–MCM–41(Cx) and synthesized with a template agent with two carbon atoms less than the number of carbon atoms of a fatty acid. The effects of different reaction variables were investigated to optimize the reaction conditions for the maximum conversion. The stability of the catalyst was also verified. Finally, a mixed catalyst was used to catalyze in situ the esterification of fatty acids in a fermentation broth, which reached a high level (close to 90%). This paper provides references for the synthesis of a hydrophobic solid acid catalyst and green synthesis by esterification reactions in an aqueous solution and a fermentation broth system.

show abstract

Amphiphilic heteropolyacid-based sulfonic acid-functionalised ionic liquids as efficient catalysts for biodiesel production

Cited by 12 publications

References 66 publications

Intensification Mechanism of Acidic Imidazole-Based Ionic Liquids on the Synthesis of 1,3,5-Trioxane Catalyzed by Sulfuric Acid

Intensification Mechanism of Acidic Imidazole-Based Ionic Liquids on the Synthesis of 1,3,5-Trioxane Catalyzed by Sulfuric Acid

In situ impregnation of cobalt‐doped tungstophosphoric acid on MOF‐801 toward enhanced catalytic activity for esterification

The Green Synthesis of Biodiesel via Esterification in Water Catalyzed by the Phosphotungstic Acid–Functionalized Hydrophobic MCM–41 Catalyst

Contact Info

Product

Resources

About