Integral process for obtaining acetins from crude glycerol and their effect on the octane index

Herrada-Vidales, Juan A.; García-González, Juan Manuel; Martínez‐Palou, Rafael; Guzmán‐Pantoja, Javier

doi:10.1080/00986445.2019.1578758

Cited by 11 publications

(8 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At least if crude glycerol comes from an oil transesterification reaction, where basic inorganic catalysts (i. e., NaOH or KOH) are employed typically to produce biodiesel, which is the case in Mexico. If glycerol comes from a transesterification reaction in an acid medium (i. e., H 2 SO 4 ), before carrying out the reaction in question, a prior glycerol conditioning process would be required (i. e., pH adjustment) as it was previously reported for other crude glycerol valorization reaction [40] . On the other hand, polymeric catalysts containing C8 and C12 alkyl chains (entries 6–9) displayed slightly better conversion performance than the PolyILs with shorter alkyl chains (entries 2–5).…”

Section: Resultsmentioning

confidence: 99%

“…If glycerol comes from a transesterification reaction in an acid medium (i. e., H 2 SO 4 ), before carrying out the reaction in question, a prior glycerol conditioning process would be required (i. e., pH adjustment) as it was previously reported for other crude glycerol valorization reaction. [40] On the other hand, polymeric catalysts containing C8 and C12 alkyl chains (entries 6-9) displayed slightly better conversion performance than the PolyILs with shorter alkyl chains (entries 2-5). None of the polymeric catalysts was soluble under the reaction conditions, and their separation and regeneration were facilitated by remaining in a heterogeneous phase.…”

Section: Glc From Pure and Crude Glycerolmentioning

confidence: 98%

See 1 more Smart Citation

Glycerol Carbonate Synthesis Using Poly(1‐alkyl‐3‐vinylimidazolium) Imidazolates as Catalysts

2020

View full text Add to dashboard Cite

Four poly(ionic liquid)s were synthesized from 1-alkyl-3-vinylimidazolium bromide with alkyl chains consisting of 2, 4, 8, and 12 carbon atoms and evaluated as catalysts for glycerol carbonate synthesis through the reaction between pure and crude glycerol with dimethyl carbonate. All the catalysts showed good performance even with crude glycerol obtained from biodiesel production, achieving conversions greater than 90 % and selectivities above 80 % at 70°C. The catalysts were evolved at 5 and 10 mol.%, and no noticeable effect on conversion and selectivity were observed due to the concentration increase. A mechanism was proposed to understand the effect of the anion and polymer properties on the catalytic performance. The catalysts were regenerated and reused in two reaction cycles without significant catalytic activity loss.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Glc From Pure and Crude Glycerolmentioning

confidence: 98%

Glycerol Carbonate Synthesis Using Poly(1‐alkyl‐3‐vinylimidazolium) Imidazolates as Catalysts

2020

View full text Add to dashboard Cite

show abstract

“…25,26 Glyceryl esters, when blended into liquid fuels, may reduce emissions of pollutants and increase the cetane number. 27 The glycerol esterification results in mono-, di-, and triglyceryl esters, which are compounds with distinct properties and applications. Glyceryl monoacetate has been used as defoamer in milk processing and as an emulsifying agent in fine mechanical oils, lubricant components, aqueous fibers, and other applications.…”

Section: Introductionmentioning

confidence: 99%

“…27 Glyceryl triacetate is an excellent solvent and is used as a plasticizer by the polymers industry. 27 Glyceryl di-and triacetate are also fuel bioadditives. 26 Traditionally, glyceryl esters are synthesized via Fisher esterification, using homogeneous liquid acid catalysts; nonetheless, its use results in a large production of effluents and neutralization residues.…”

Section: Introductionmentioning

confidence: 99%

Glycerol Esterification over Sn(II)-Exchanged Keggin Heteropoly Salt Catalysts: Effect of Thermal Treatment Temperature

et al. 2019

View full text Add to dashboard Cite

In this work, Sn(II)-exchanged Keggin heteropoly acid salts were evaluated as solid catalysts in glycerol esterification reactions with acetic acid. All the Sn(II) heteropoly salts and their precursor Keggin acids were characterized by FT-IR/ATR, XRD, TG/DSC, BET, and EDS/SEM analyses. Among salts synthesized (i.e., Sn 3/2 PW 12 O 40 , Sn 2 SiW 12 O 40 , and Sn 3/2 PMo 12 O 40 ), Sn 3/2 PW 12 O 40 was the most active and selective catalyst toward glycerol esters. Effects of thermal treatment on the physical and chemical properties of Sn 3/2 PW 12 O 40 were investigated. The Sn 3/2 PW 12 O 40 -300 K catalyst was efficiently recovered and reused without a loss in activity. The influences of main reaction parameters such as reaction temperature, the stoichiometry of reactants, load, and thermal treatment temperature of the Sn 3/2 PW 12 O 40 catalyst were assessed. The simple workup of synthesis and the high activity and selectivity for glycerol esters in addition to the high efficiency during successive recycles are positive aspects of this catalyst.

show abstract

“…The glycerol acetylation process produces three different compounds, monoacetins, diacetins and triacetin, whose yields are affected by many process and chemical parameters [31,32]. Mixtures of diacetins and triacetin are valuable diesel or gasoline additives leading to enhanced cold resistance, improved viscosity and anti-knocking properties [33,34]. Similarly, monoacetins could be converted to solketal derivatives that show the same properties of di-and triacetin, with low consumption of acetic acid required for their production [35].…”

Section: Introductionmentioning

confidence: 99%

Glycerol Acetylation Mediated by Thermally Hydrolysed Biosolids-Based Material

et al. 2019

View full text Add to dashboard Cite

Crude glycerol is the main by-product of many renewable diesel production platforms. However, the process of refining glycerol from this crude by-product stream is very expensive, and thus does not currently compete with alternative processes. The acetylation of glycerol provides an intriguing strategy to recover value-added products that are employable as fuel additives. In this work, the conversion of glycerol to acetyl derivatives was facilitated by a heterogeneous catalyst generated from the thermal hydrolysis of biosolids obtained from a municipal wastewater treatment facility. The reaction was studied using several conditions including temperature, catalyst loading, acetic acid:glycerol molar ratio, and reaction time. The data demonstrate the potential for using two distinct by-product streams to generate fuel additives that can help improve the process economics of renewable diesel production.

show abstract

Integral process for obtaining acetins from crude glycerol and their effect on the octane index

Cited by 11 publications

References 46 publications

Glycerol Carbonate Synthesis Using Poly(1‐alkyl‐3‐vinylimidazolium) Imidazolates as Catalysts

Glycerol Carbonate Synthesis Using Poly(1‐alkyl‐3‐vinylimidazolium) Imidazolates as Catalysts

Glycerol Esterification over Sn(II)-Exchanged Keggin Heteropoly Salt Catalysts: Effect of Thermal Treatment Temperature

Glycerol Acetylation Mediated by Thermally Hydrolysed Biosolids-Based Material

Contact Info

Product

Resources

About