Kinetic study of oleic acid esterification over 12-tungstophosphoric acid catalyst anchored to different mesoporous silica supports

2013 ◽  
Vol 113 ◽  
pp. 141-149 ◽  
Author(s):  
Anjali Patel ◽  
Varsha Brahmkhatri
Keyword(s):  
Oleic Acid ◽  
Mesoporous Silica ◽  
Kinetic Study ◽  
Acid Catalyst ◽  
Tungstophosphoric Acid ◽  
Silica Supports ◽  
Acid Esterification

scholarly journals The Effect of Co-solvent on Esterification of Oleic Acid Using Amberlyst 15 as Solid Acid Catalyst in Biodiesel Production

2018 ◽  
Vol 156 ◽  
pp. 03002
Author(s):  
Iwan Ridwan ◽  
Mukhtar Ghazali ◽  
Adi Kusmayadi ◽  
Resza Diwansyah Putra ◽  
Nina Marlina ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Amberlyst 15 ◽  
Acid Esterification

The oleic acid solubility in methanol is low due to two phase separation, and this causes a slow reaction time in biodiesel production. Tetrahydrofuran as co-solvent can decrease the interfacial surface tension between methanol and oleic acid. The objective of this study was to investigate the effect of co-solvent, methanol to oleic acid molar ratio, catalyst amount, and temperature of the reaction to the free fatty acid conversion. Oleic acid esterification was conducted by mixing oleic acid, methanol, tetrahydrofuran and Amberlyst 15 as a solid acid catalyst in a batch reactor. The Amberlyst 15 used had an exchange capacity of 2.57 meq/g. Significant free fatty acid conversion increments occur on biodiesel production using co-solvent compared without co-solvent. The highest free fatty acid conversion was obtained over methanol to the oleic acid molar ratio of 25:1, catalyst use of 10%, the co-solvent concentration of 8%, and a reaction temperature of 60°C. The highest FFA conversion was found at 28.6 %, and the steady state was reached after 60 minutes. In addition, the use of Amberlyst 15 oleic acid esterification shows an excellent performance as a solid acid catalyst. Catalytic activity was maintained after 4 times repeated use and reduced slightly in the fifth use.

So42- /ZrO2 Solid Super-Strong Acid Esterification Catalyst Prepared by Supersonic Wave Technique

2011 ◽  
Vol 291-294 ◽  
pp. 3311-3317 ◽  
Author(s):  
Xiao Min Luo ◽  
Peng Ni Li ◽  
Dong Qiu Wu ◽  
Hui Jun Ren
Keyword(s):  
Crystal Structure ◽  
Oleic Acid ◽  
Polyethylene Glycol ◽  
Catalyst Activity ◽  
Acid Catalyst ◽  
Strong Acid ◽  
Immersion Method ◽  
Element Analysis ◽  
Wave Technique ◽  
Acid Esterification

SO42-/ZrO2 solid super-strong acid catalyst was prepared by supersonic immersion method and the catalysts were characterized respectively by IR, BET, XRD, Element Analysis and SEM methods. The results showed that the catalyst prepared by supersonic immersion method had the larger specific surface area, the smaller grain size, the looser crystal structure, the higher surface roughness and the more border location and edge locations, which were helpful to increase the number of catalyst activity centers and was used for the esterification of polyethylene glycol oleic acid produced by oleic acid and polyethylene glycol. It also had the higher catalytic activity and longer service life.

Tungstophosphoric Acid Entrapped on Mesoporous Silica via Sol Gel Technique

2006 ◽  
Vol 11-12 ◽  
pp. 69-72
Author(s):  
Joon Ching Juan ◽  
Yarmo Mohd Ambar ◽  
Jing Chang Zhang
Keyword(s):  
Mesoporous Silica ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sol Gel ◽  
Chemical Properties ◽  
Acid Catalyst ◽  
Tungstophosphoric Acid ◽  
Esterification Reaction ◽  
Heterogeneous Acid Catalyst ◽  
Gel Technique

The heterogeneous 12-tungstophosphoric acid (HPW) catalyst is becoming important in industrial processes for example in esterification reaction. A novel solid acid catalyst of HPW entrapped on mesoporous silica was synthesized by sol gel technique. Neutral template dodecylamine was introduced to obtain mesopores structure catalyst. The physical and chemical properties of the catalyst were characterized by XRD, nitrogen sorption and FTIR. In conclusion, this new type of mesoporous solid acid catalyst is a very promising heterogeneous acid catalyst for esterification reaction involving bulky molecules such as fatty acid.

A novel kinetic study of H3PW12O40 - catalyzed oleic acid esterification with methanol via 1H NMR spectroscopy

2012 ◽  
Vol 96 ◽  
pp. 98-103 ◽  
Author(s):  
Sergio Antonio Fernandes ◽  
Abiney Lemos Cardoso ◽  
Márcio José da Silva
Keyword(s):  
Oleic Acid ◽  
Nmr Spectroscopy ◽  
Kinetic Study ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Acid Esterification

scholarly journals Sulfonated Carbon Material as An Efficient Solid Acid Catalyst for Biodiesel Synthesis via Oleic Acid Esterification Under High Voltage Conditions

2019 ◽  
Author(s):  
Mohammad Mahdavi ◽  
Amir hosein Darab
Keyword(s):  
Oleic Acid ◽  
High Voltage ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Reusable Catalyst ◽  
Biodiesel Synthesis ◽  
Acid Esterification ◽  
Short Times ◽  
Heterogeneous Solid

Sulfonated carbon was used as an efficient and reusable heterogeneous solid acid catalyst for the synthesis of biodiesel via esterification of oleic acid with methanol under high voltage conditions. Using an inexpensive and reusable catalyst, environmental benignity, excellent yields in short times, synthesis in atmospheric pressure and low temperature conditions are some of the important features of this protocol. In the final results were confirmed by GC.

Natural Phosphate Supported Titania as a Novel Solid Acid Catalyst for Oleic Acid Esterification

2017 ◽  
Vol 56 (20) ◽  
pp. 5821-5832 ◽  
Author(s):  
Younes Essamlali ◽  
Mohamed Larzek ◽  
Bilal Essaid ◽  
Mohamed Zahouily
Keyword(s):  
Oleic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Natural Phosphate ◽  
Acid Esterification
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