Thermodynamic and Kinetic Study on the Catalysis of Isobornyl Acetate by a Cation Exchange Resin an Intensified Fixed-Bed Reactor

2021 ◽  
Vol 72 (1) ◽  
pp. 111-124
Author(s):  
Wanglai Dong ◽  
Lei Chen ◽  
Hanzhao Yan ◽  
Zijie Zhang ◽  
Zheng Zhou
Keyword(s):  
Exchange Resin ◽  
Homogeneous Model ◽  
Fixed Bed ◽  
Cation Exchange Resin ◽  
Fixed Bed Reactor ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Catalyst Reusability ◽  
Kinetics Of ◽  
Experimental Reference

Esterification Thermodynamic and Kinetic on acetic acid with camphene was studied systematically in an intensified fixed bed reactor at 303-323 K with anhydrous NKC-9 resin. The catalyst loading, initial molar ratio, temperature, and catalyst reusability were studied and optimized. The method of UNIFAC was applied to calculate the activity coefficient of each component for correcting the nonideality of the solution. Reaction enthalpy, entropy, and Gibbs free energy were calculated. The kinetics of camphene esterification was studied by pseudo-homogeneous model (PH model), and the fitting effect was good, which provided experimental reference and theoretical basis for the industrial production of isobornyl acetate.

Study on Methyl Esterification of Salicylic Acid Using an Intensified Fixed Bed Reactor

2019 ◽  
Vol 17 (8) ◽  
Author(s):  
Gaodong Yang ◽  
Si Chen ◽  
Xiabing Li ◽  
Chengzhi Liu ◽  
Jian He ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Exchange Resin ◽  
Fixed Bed ◽  
Cation Exchange Resin ◽  
Fixed Bed Reactor ◽  
Catalyst Loading ◽  
Optimal Conditions ◽  
Methyl Esterification ◽  
Acid Catalyzed ◽  
Good Agreement

Abstract Methyl esterification of salicylic acid catalyzed by strong acidic cation exchange resin NKC-9 was carried out on an intensified fixed bed reactor (IFBR) to investigate the effects of different parameters and the results showed that the optimal conditions were as follows: circulation speed is 1.5 L· h−1, catalyst loading is 20 %, initial mole ratio of salicylic acid and methanol is 1:6 and reaction temperature is 343.15 K. The thermodynamics for the methyl esterification of salicylic acid have been studied to obtain the equilibrium constant from the experimental data at different temperature. PH, E-R and LHHW models were used to correlate the kinetic data in the temperature range from 328.15 to 348.15 K. The calculated value is in good agreement with experimental value, indicating that all the models can be used to accurately describe the process of the methyl esterification of salicylic acid.

Synthesis of Biodiesel from by-Product of Plant Oil by the Catalysis of Solid Acid in Fixed Bed

2011 ◽  
Vol 322 ◽  
pp. 15-20
Author(s):  
Li Min Xi ◽  
Shu Yong Cao
Keyword(s):  
Solid Acid ◽  
Exchange Resin ◽  
Fixed Bed ◽  
Cation Exchange Resin ◽  
Acid Methyl Ester ◽  
Fixed Bed Reactor ◽  
National Standard ◽  
Deodorizer Distillate ◽  
Plant Oil ◽  
Acid Methyl

Fatty acid methyl ester biodiesel was successfully synthesized by the esterification of the palm oil deodorizer distillate (PODD) with methanol, catalyzed by the strongly acidic cation-exchange resin as solid acid in a self-made fixed bed reactor. The reaction condition was optimized, and the product could basically reach both national standard and Germany standard.

scholarly journals Thermodynamic and Kinetic Study on the Catalysis of Isoamyl Acetate by a Cation-Exchange Resin in an Intensified Fixed-Bed Reactor

ACS Omega ◽  
2020 ◽  
Vol 5 (40) ◽  
pp. 25810-25818
Author(s):  
Lei Chen ◽  
Ying Liu ◽  
Zhi Cao ◽  
Gaodong Yang ◽  
Aidong Zhou ◽  
...  
Keyword(s):  
Kinetic Study ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Fixed Bed ◽  
Cation Exchange Resin ◽  
Isoamyl Acetate ◽  
Fixed Bed Reactor

CO2 valorization into synthetic natural gas (SNG) using a Co–Ni bimetallic Y2O3 based catalysts

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Radwa A. El-Salamony ◽  
Sara A. El-Sharaky ◽  
Seham A. Al-Temtamy ◽  
Ahmed M. Al-Sabagh ◽  
Hamada M. Killa
Keyword(s):  
Reaction Mechanism ◽  
Natural Gas ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Molar Ratio ◽  
Impregnation Method ◽  
Synthetic Natural Gas ◽  
Methanation Reaction ◽  
Co2 Valorization

Abstract Recently, because of the increasing demand for natural gas and the reduction of greenhouse gases, interests have focused on producing synthetic natural gas (SNG), which is suggested as an important future energy carrier. Hydrogenation of CO2, the so-called methanation reaction, is a suitable technique for the fixation of CO2. Nickel supported on yttrium oxide and promoted with cobalt were prepared by the wet-impregnation method respectively and characterized using SBET, XRD, FTIR, XPS, TPR, and HRTEM/EDX. CO2 hydrogenation over the Ni/Y2O3 catalyst was examined and compared with Co–Ni/Y2O3 catalysts, Co% = 10 and 15 wt/wt. The catalytic test was conducted with the use of a fixed-bed reactor under atmospheric pressure. The catalytic performance temperature was 350 °C with a supply of H2:CO2 molar ratio of 4 and a total flow rate of 200 mL/min. The CH4 yield was reached 67%, and CO2 conversion extended 48.5% with CO traces over 10Co–Ni/Y2O3 catalyst. This encourages the direct methanation reaction mechanism. However, the reaction mechanism over Ni/Y2O3 catalyst shows different behaviors rather than that over bi-metal catalysts, whereas the steam reforming of methane reaction was arisen associated with methane consumption besides increase in H2 and CO formation; at the same temperature reaction.

scholarly journals Performance Analysis of TiO2-Modified Co/MgAl2O4 Catalyst for Dry Reforming of Methane in a Fixed Bed Reactor for Syngas (H2, CO) Production

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3347
Author(s):  
Arslan Mazhar ◽  
Asif Hussain Khoja ◽  
Abul Kalam Azad ◽  
Faisal Mushtaq ◽  
Salman Raza Naqvi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Fixed Bed Reactor ◽  
Dry Reforming Of Methane ◽  
Catalyst Stability ◽  
Feed Ratio ◽  
Catalyst Loading ◽  
Impregnation Method

Co/TiO2–MgAl2O4 was investigated in a fixed bed reactor for the dry reforming of methane (DRM) process. Co/TiO2–MgAl2O4 was prepared by modified co-precipitation, followed by the hydrothermal method. The active metal Co was loaded via the wetness impregnation method. The prepared catalyst was characterized by XRD, SEM, TGA, and FTIR. The performance of Co/TiO2–MgAl2O4 for the DRM process was investigated in a reactor with a temperature of 750 °C, a feed ratio (CO2/CH4) of 1, a catalyst loading of 0.5 g, and a feed flow rate of 20 mL min−1. The effect of support interaction with metal and the composite were studied for catalytic activity, the composite showing significantly improved results. Moreover, among the tested Co loadings, 5 wt% Co over the TiO2–MgAl2O4 composite shows the best catalytic performance. The 5%Co/TiO2–MgAl2O4 improved the CH4 and CO2 conversion by up to 70% and 80%, respectively, while the selectivity of H2 and CO improved to 43% and 46.5%, respectively. The achieved H2/CO ratio of 0.9 was due to the excess amount of CO produced because of the higher conversion rate of CO2 and the surface carbon reaction with oxygen species. Furthermore, in a time on stream (TOS) test, the catalyst exhibited 75 h of stability with significant catalytic activity. Catalyst potential lies in catalyst stability and performance results, thus encouraging the further investigation and use of the catalyst for the long-run DRM process.

Study on Synthesis of Ester of Citric Acid and Palmityl Alcohol

2014 ◽  
Vol 900 ◽  
pp. 361-364
Author(s):  
Xiao Hui Wang ◽  
Xi Hua Du ◽  
Li Min Dong
Keyword(s):  
Reaction Time ◽  
Citric Acid ◽  
Cation Exchange ◽  
Sulfonic Acid ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Molar Ratio ◽  
Esterification Reaction ◽  
Process Conditions ◽  
Toluene Sulfonic Acid

Esters of Citric acid and palmityl alcohol were synthesized by esterification reaction under catalysis of cation exchange resin and P-toluene sulfonic acid respectively. The effects of amount of catalyst, ratio of raw materials, reaction time and temperature on the synthesis reaction were investigated . The experimental results showed that optimum of process conditions were 1:1~1:1.5 molar ratio of citric acid and palmityl alcohol, reaction temperature of 130~140°C, reaction time of 2 h. Conversion of palmityl alcohol were all more than 90% under 0.3% dosage using p-toluene sulfonic acid as the catalyst, or 0.5% dosage using 721 cation exchange resin with sulfonic acid type as catalyst. The synthesized product had good surface activity.

scholarly journals Esterification of palmitic acid with epichlorohydrin on anion exchange resin catalyst

2007 ◽  
Vol 5 (3) ◽  
pp. 715-726 ◽  
Author(s):  
Emil Muresan ◽  
Spiridon Oprea ◽  
Theodor Malutan ◽  
Mihai Vata
Keyword(s):  
Palmitic Acid ◽  
Exchange Resin ◽  
Catalyst Particle ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Esterification Reaction ◽  
Macroporous Resin ◽  
Resin Catalyst ◽  
Catalyst Particle Size ◽  
Rate Of Reaction

AbstractThe esterification reaction of palmitic acid with epichlorohydrin catalyzed by an anionic macroporous resin was studied. Purolite A-500 resin proved to be a very effective catalyst in the synthesis of 3-chloro-2-hydroxypropyl palmitate. The effects of certain parameters such as speed of agitation, catalyst particle size, catalyst loading, temperature, initial molar ratio between reactants on the rate of reaction were studied. It was found that the overall rate is intrinsically kinetically controlled. The structure of synthesized ester was confirmed by FTIR and 1H NMR analyses.

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