A Computational Investigation of OME‐synthesis through Homogeneous Acid Catalysis

ChemCatChem ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1949-1954 ◽  
Author(s):  
Tiago J. Goncalves ◽  
Philipp N. Plessow ◽  
Felix Studt
Keyword(s):  
Acid Catalysis ◽  
Computational Investigation ◽  
Homogeneous Acid

scholarly journals FATTY ACID ESTERIFICATION: EFFECTS OF UNSATURATION AND SYNTHESIS WITH THERMAL HEATING VIA ULTRASON AND MICROWAVES

2018 ◽  
Vol 15 (30) ◽  
pp. 447-462
Author(s):  
M. C. de M. SOUZA ◽  
L. DI SOUZA ◽  
V. P. da S. Caldeira ◽  
A. G. D. SANTOS ◽  
B. ADILSON
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Energy Demand ◽  
Fossil Fuels ◽  
Acid Catalysis ◽  
Thermal Heating ◽  
Ultrasonic Methods ◽  
Homogeneous Acid ◽  
Acid Esterification

With the increasing selective energy demand, fossil fuels are becoming scarce and environmentally incorrect, a viable alternative to this problem being the production of biodiesel. However, the esterification and transesterification reactions used are slow, expensive and ecologically incorrect because they produce polluting waste. Thus, it is necessary to develop techniques, reagents and equipment that make them fast, cheap and environmentally friendly. This work evaluated the performance of the thermal heating, microwave and ultrasonic methods in the esterification efficiency of oleic and stearic fatty acids via homogeneous acid catalysis. The efficiency of the reaction was certificated with the variables: time, yield and conversion and the biodiesel characterization were done with TG / DTG, FTIR and NMR. Conversions were determined by TG and 1H NMR and the yield by gravimetry. The results showed conversion with all methods with differences in the analyzed variables. The yields decrease in the microwave order (52%) conduction (33%) ultrasound (30%) for reactions with oleic acid and are practically the same (22, 22 and 20), independently of the stearic acid. Among the methods used, the most efficient is the microwave, because it has a higher yield in the case of oleic acid and reducing the reaction time.

scholarly journals Mechanism and theory of d-glucopyranose homogeneous acid catalysis in the aqueous solution phase

2019 ◽  
Vol 21 (32) ◽  
pp. 17993-18011 ◽  
Author(s):  
Manik Kumer Ghosh ◽  
Mícheál Séamus Howard ◽  
Karla Dussan ◽  
Stephen Dooley
Keyword(s):  
Aqueous Solution ◽  
Acid Hydrolysis ◽  
Acid Catalysis ◽  
Theoretical Study ◽  
Solution Phase ◽  
Homogeneous Acid ◽  
Hydrolysis Of

Theoretical study of the mechanism of acid hydrolysis of β-d-glucopyranose in the aqueous solution.

Synthesis of terpineol from α-pinene by homogeneous acid catalysis

2005 ◽  
Vol 107-108 ◽  
pp. 310-314 ◽  
Author(s):  
M. Román-Aguirre ◽  
L. De la Torre-Sáenz ◽  
Wilber Antúnez Flores ◽  
A. Robau-Sánchez ◽  
A. Aguilar Elguézabal
Keyword(s):  
Acid Catalysis ◽  
Homogeneous Acid

Investigation of the kinetics of the synthesis of methylheptenone under conditions of homogeneous acid catalysis

1981 ◽  
Vol 15 (11) ◽  
pp. 798-801
Author(s):  
M. M. Avrutskii ◽  
M. A. Miropol'skaya ◽  
M. G. Romanyuk ◽  
I. B. Tikhova ◽  
N. I. Zakharova ◽  
...  
Keyword(s):  
Acid Catalysis ◽  
Homogeneous Acid ◽  
Kinetics Of

scholarly journals Ethyl esters obtained from pequi and macaúba oils by transesterification with homogeneous acid catalysis

Fuel ◽  
2020 ◽  
Vol 259 ◽  
pp. 116206 ◽  
Author(s):  
Raflem Christian Matos dos Santos ◽  
Paula Cristina Gurgel ◽  
Nizamara Simenremis Pereira ◽  
Rodolfo Andrade Breves ◽  
Paulo Roberto Rodrigues de Matos ◽  
...  
Keyword(s):  
Acid Catalysis ◽  
Ethyl Esters ◽  
Homogeneous Acid
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