Comprehensive elucidation of the apparent kinetics and mass transfer resistances for biodiesel production via in-house developed carbonaceous catalyst

•The study elucidates the apparent kinetics and mass transfer parameters for transesterification.•Indigenously developed carbon catalyst is used for conversion of RSO to biodiesel.•Kinetic models using E–L and L–H mechanism suggests glycerol desorption as rate limiting step.•Mass transfer effects we...

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Bibliographic Details
Published in:Chemical engineering research & design 2021-01, Vol.165, p.192-206
Main Authors: Dhawane, Sumit H., Al-Sakkari, E.G., Kumar, Tarkeshwar, Halder, Gopinath
Format: Article
Language:English
Subjects:
Biodiesel
Biodiesel fuels
Carbonaceous catalyst
Catalysts
Chemical synthesis
Conversion
Heterogeneous catalysis
Kinetics
Mass transfer
Reaction kinetics
Regression coefficients
Rubber
Studies
Surface properties
Transesterification
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Summary:•The study elucidates the apparent kinetics and mass transfer parameters for transesterification.•Indigenously developed carbon catalyst is used for conversion of RSO to biodiesel.•Kinetic models using E–L and L–H mechanism suggests glycerol desorption as rate limiting step.•Mass transfer effects were negligible and process is kinetically controlled. The present study aims at providing an insight into the apparent kinetics and mass transfer studies on the synthesis of biodiesel from rubber seed oil using indigenously developed carbonaceous catalyst. The carbon-supported catalyst developed from waste biomass is used in transesterification of rubber seed oil and effects of synthesized porous catalyst on the kinetics and mass transfer has been extensively analyzed. The apparent kinetic models for individual steps have been developed following power law, Eley–Rideal (E–R) and Langmuir–Hinshelwood (L–H) mechanisms. Moreover, effects of mass transfer and catalyst properties on the kinetics have been also evaluated. The experimental data has been gathered for studying the apparent kinetics at different temperatures using same catalyst and best fitting of the data in developed apparent kinetic models was estimated by regression coefficient (R2) and comparing experimental and predicted concentrations of each reactant and product species. The analysis of the experimental data and fitting of kinetic models revealed that desorption of the glycerol from the catalyst active sites is the slowest step and controlling the overall rate of reaction. Moreover, mass transfer effects on the conversion and kinetics were negligible and conversion was solely controlled by the catalysts surface properties.
ISSN:0263-8762
1744-3563
DOI:10.1016/j.cherd.2020.11.003