scholarly journals Kinetics of hydrolysis and methyl esterification for biodiesel production in two-step supercritical methanol process

Fuel ◽  
2006 ◽  
Vol 85 (17-18) ◽  
pp. 2479-2483 ◽  
Author(s):  
E MINAMI ◽  
S SAKA
Keyword(s):  
Biodiesel Production ◽  
Supercritical Methanol ◽  
Methyl Esterification ◽  
Kinetics Of Hydrolysis ◽  
Kinetics Of

scholarly journals Laboratory-Scale Research of Non-Catalyzed Supercritical Alcohol Process for Continuous Biodiesel Production

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 435
Author(s):  
Aso A. Hassan ◽  
Joseph D. Smith
Keyword(s):  
Plug Flow ◽  
Tubular Reactor ◽  
Volumetric Flow Rate ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Supercritical Methanol ◽  
Setup Cost ◽  
Reaction Conditions ◽  
Reactor Technology ◽  
Kinetics Of

This work investigates the non-catalyzed supercritical methanol (SCM) process for continuous biodiesel production. The lab-scale setup was designed and used for biodiesel production in the temperature range of 520–650 K and 83–380 bar with an oil-to-methanol molar ratio ranging from 1:5 to 1:45. The experiments were performed in the coiled plug flow tubular reactor. The volumetric flow rate of the methanol/oil ranged from 0.1–10 mL/min. This work examines a new reactor technology involving preheating and pre-mixing of the methanol/oil mixture to reduce setup cost and increase biodiesel yield under the same reaction conditions. Work performed showed that FAME’s yield increased rapidly with temperature and pressure above the methanol critical points (i.e., 513 K and 79.5 bar). The best methyl-ester yield using this reaction technology was 91% at 590 K temperature and 351 bars with an oil-to-methanol ratio of 39 and a 15-min residence time. Furthermore, the kinetics of the free catalyst transesterification process was studied in supercritical methanol under different reaction conditions.

Esterification kinetics of free fatty acids with supercritical methanol for biodiesel production

2010 ◽  
Vol 51 (5) ◽  
pp. 1055-1059 ◽  
Author(s):  
R. Alenezi ◽  
G.A. Leeke ◽  
J.M. Winterbottom ◽  
R.C.D. Santos ◽  
A.R. Khan
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Biodiesel Production ◽  
Supercritical Methanol ◽  
Kinetics Of

Kinetics of hydrolysis of peroxodisulphate ions in acidic medium to peroxomonosulphuric acid

1981 ◽  
Vol 46 (5) ◽  
pp. 1229-1236 ◽  
Author(s):  
Jan Balej ◽  
Milada Thumová
Keyword(s):  
Ionic Strength ◽  
Rate Constants ◽  
Acidic Medium ◽  
Measured Data ◽  
Molar Ratios ◽  
Starting Solution ◽  
Kinetics Of Hydrolysis ◽  
Rate Of Hydrolysis ◽  
Kinetics Of ◽  
Hydrolysis Of

The rate of hydrolysis of S2O82- ions in acidic medium to peroxomonosulphuric acid was measured at 20 and 30 °C. The composition of the starting solution corresponded to the anolyte flowing out from an electrolyser for production of this acid or its ammonium salt at various degrees of conversion and starting molar ratios of sulphuric acid to ammonium sulphate. The measured data served to calculate the rate constants at both temperatures on the basis of the earlier proposed mechanism of the hydrolysis, and their dependence on the ionic strength was studied.

In-depth study of the transesterification reaction of Pongamia pinnata oil for biodiesel production using catalyst-free supercritical methanol process

2016 ◽  
Vol 113 ◽  
pp. 23-30 ◽  
Author(s):  
V.M. Ortiz-Martínez ◽  
M.J. Salar-García ◽  
F.J. Palacios-Nereo ◽  
P. Olivares-Carrillo ◽  
J. Quesada-Medina ◽  
...  
Keyword(s):  
Pongamia Pinnata ◽  
Transesterification Reaction ◽  
Biodiesel Production ◽  
Supercritical Methanol ◽  
Catalyst Free ◽  
Depth Study

Properties of Thiolesters: Kinetics of Hydrolysis in Dilute Aqueous Media1

1953 ◽  
Vol 75 (4) ◽  
pp. 913-917 ◽  
Author(s):  
Lafayette H. Noda ◽  
Stephen A. Kuby ◽  
Henry A. Lardy
Keyword(s):  
Kinetics Of Hydrolysis ◽  
Kinetics Of

Kinetics of Hydrolysis of Some Bifunctional Schiff Bases

1990 ◽  
Vol 37 (5) ◽  
pp. 479-487 ◽  
Author(s):  
M.R. Mahmoud ◽  
A.M. El-Nady ◽  
F.A. Adam ◽  
M.A. El-Taher
Keyword(s):  
Schiff Bases ◽  
Kinetics Of Hydrolysis ◽  
Kinetics Of ◽  
Hydrolysis Of

scholarly journals Isothermal and non-isothermal kinetics of hydrolysis of 1-[2-(2- pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]- perhydroazepinium chloride (BK 129)

2013 ◽  
Vol 60 (2) ◽  
pp. 43-48
Author(s):  
Stankovičová M. ◽  
Bezáková Ž. ◽  
Beňo P. ◽  
Húšťavová P.
Keyword(s):  
Biological Activity ◽  
Alkaline Hydrolysis ◽  
Functional Group ◽  
Isothermal Kinetics ◽  
Basic Part ◽  
Buffer Solutions ◽  
Kinetics Of Hydrolysis ◽  
Short Time ◽  
Kinetics Of ◽  
Hydrolysis Of

Abstract The substance BK 129 - 1-[2-(2-pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]-perhydroazepinium chloride was prepared in terms of influence of the connecting chain between the carbamate functional group and the basic part of molecule on biological activity. Such a structural feature is important with regard to its stability. In this work we determined the rate constants of alkaline hydrolysis of this compound at increased temperature under isothermal and non-isothermal conditions. The hydrolysis was also performed in buffer solutions with the purpose of evaluating its stability. Non-isothermal tests of stability enable to reduce the number of analyses. The necessary data for stability of compound are in this way achieved in a short time.

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