A Study of Direct Hydration of Dihydromyrcene to Dihydromyrcenol Using Cation Exchange Resins as Catalyst

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Yong Liu ◽  
Zheng Zhou ◽  
Gaodong Yang ◽  
Youting Wu ◽  
Zhibing Zhang
Keyword(s):  
Cation Exchange ◽  
Reaction Rate ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Reaction Rate Constants ◽  
Cation Exchange Resins ◽  
Catalyst Type ◽  
Exchange Resins ◽  
Reaction Activation Energy ◽  
Kinetics Of

A study of direct hydration of dihydromyrcene (DHM) with H2O to produce dihydromyrcenol (DHMOH) has been carried out using cation exchange resins as catalysts in a batch stirred-tank reactor. The effect of different parameters such as agitating speed, catalyst type, catalyst loading, molar ratio of the reactants and solvent, temperature and solvent on the conversion of DHM were investigated to obtain the optimal conditions of the reaction. The kinetics of hydration process was studied in the temperature range from 333.15 K to 353.15 K. A pseudo-homogeneous kinetics model was used to explain the reaction rate and the reaction rate constants and the reaction activation energy were determined.

scholarly journals Kinetic modeling of canola oil transesterification catalyzed by quicklime

2018 ◽  
Vol 16 (6) ◽  
Author(s):  
J.N. Camacho ◽  
G. E. Galván Muciño ◽  
S.L. Martínez Vargas ◽  
C. Pérez Alonso ◽  
R. Natividad
Keyword(s):  
Experimental Data ◽  
Kinetic Model ◽  
Canola Oil ◽  
Reaction Rate ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Minor Effect ◽  
Whole Process ◽  
High Effect ◽  
Kinetics Of

This work aimed to study and model the kinetics of transesterification of canola oil with methanol catalyzed by calcined quicklime (CaO + MgO). The influence of three main variables was studied at 328 K: reagents order addition (has a negligible effect on the reaction), methanol-oil molar ratio (has minor effect on reaction rate after 1.5 h of reaction) and catalyst loading (high effect on reaction rate) to achieve at least a triglycerides conversion of 96.5% in concordance with norm EN 14103. A kinetic model based on an Eley-Rideal mechanism was found to well fit (R2 = 0.9886) the experimental data. Thus, it was concluded that for the quicklime catalyzed transesterification of canola oil with methanol to occur, first the methanol must be chemisorbed and the resulting methoxy species react with triglycerides in the interface liquid-solid. The whole process is limited by this step since methanol readily adsorbs onto the catalytic surface.

Study on Direct Hydration of Camphene to Isoborneol by Cation Exchange Resins

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Yong Liu ◽  
Zheng Zhou ◽  
Gaodong Yang ◽  
Zhibing Zhang
Keyword(s):  
Experimental Data ◽  
Cation Exchange ◽  
Kinetic Studies ◽  
Pilot Scale ◽  
Catalyst Loading ◽  
Hydration Reaction ◽  
Mass Ratio ◽  
Reaction Conditions ◽  
Cation Exchange Resins ◽  
Exchange Resins

The direct hydration of camphene to isoborneol has been studied in the presence of strong acidic cation exchange resins as catalyst. The effect of various parameters such as temperature, catalyst loading, mass ratio of the reactants, and reaction time on the conversion of camphene was investigated to optimize the reaction conditions. Based on the optimized reaction conditions, a novel pilot-scale jet reactor was used to study the direct hydration of camphene. The kinetic studies of direct hydration reaction have been discussed in detail. A pseudo-homogeneous (PH) model was used to correlate the experimental data in the temperature range from 353.15 K to 383.15 K. The kinetic parameters were evaluated, which made the calculated results in excellent agreement with the experimental results.

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