scholarly journals Determination of Kinetic and Thermodynamic Parameters of Pyrolysis of Coal and Sugarcane Bagasse Blends Pretreated by Ionic Liquid: A Step towards Optimization of Energy Systems

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2544
Author(s):  
Saad Saeed ◽  
Mahmood Saleem ◽  
Abdullah Durrani ◽  
Junaid Haider ◽  
Muzaffar Riaz ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Thermodynamic Parameters ◽  
Sugarcane Bagasse ◽  
Average Rate ◽  
Energy Generation ◽  
Entropy Change ◽  
Thermochemical Conversion ◽  
Kinetic And Thermodynamic Parameters ◽  
Definite Pattern

Pyrolysis behavior of ionic liquid (IL) pretreated coal and sugarcane bagasse (SCB) blends through thermogravimetric analysis (TGA) was studied. Three blends of coal and SCB having 3:1, 1:1, and 1:3 ratios by weight were treated with 1-ethyl-3-methylimidazolium chloride ([Emim][Cl]) at 150 °C for 3 h. Untreated and IL treated blends were then analyzed under pyrolytic conditions in a TGA at a constant ramp rate of 20 °C/min. Kinetic and thermodynamic parameters were evaluated using ten Coats-Redfern (CR) models to assess reaction mechanism. Results showed that the untreated blends followed a definite pattern and were proportional to the concentration of SCB in the blends. IL treated blends exhibited a higher average rate of degradation and total weight loss, indicating that IL had disrupted the cross-linking structure of coal and lignocellulosic structure of SCB. This will enhance the energy generation potential of biomass through thermochemical conversion processes. The lower activation energy (Ea) was calculated for IL treated blends, revealing facile thermal decomposition after IL treatment. Thermodynamic parameters, enthalpy change (ΔH), Gibbs free energy change (ΔG), and entropy change (ΔS), revealed that the pyrolysis reactions were endothermic. This study would help in designing optimized thermochemical conversion systems for energy generation.

Pyrolysis of ficus nitida wood: Determination of kinetic and thermodynamic parameters

Fuel ◽  
2021 ◽  
Vol 283 ◽  
pp. 119253
Author(s):  
A. Tabal ◽  
A. Barakat ◽  
A. Aboulkas ◽  
K. El harfi
Keyword(s):  
Thermodynamic Parameters ◽  
Kinetic And Thermodynamic Parameters ◽  
Ficus Nitida

scholarly journals Kinetics and Thermodynamics of Thermal Degradation of Different Starches and Estimation the OH Group and H2O Content on the Surface by TG/DTG-DTA

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 357 ◽  
Author(s):  
Marita Pigłowska ◽  
Beata Kurc ◽  
Łukasz Rymaniak ◽  
Piotr Lijewski ◽  
Paweł Fuć
Keyword(s):  
Thermal Decomposition ◽  
Thermodynamic Parameters ◽  
Kinetic Method ◽  
Hydroxyl Groups ◽  
Activation Process ◽  
Kinetic And Thermodynamic Parameters ◽  
Rate Form ◽  
Low Shear Stress ◽  
Kinetics Of

The main aim of this study is to estimate the kinetic and thermodynamic parameters of thermal decomposition of starches by the Coats–Redfern method. This procedure is a commonly used thermogravimetric analysis/difference thermal gravimetry/differental thermal analysis (TG/DTG-DTA) kinetic method for single rate form. The study also shows a proposed method for reactive hydroxyl groups content on the starch surface determination, and values were in range of 960.21–1078.76 mg OH per 1 g of starch. Thermal processing revealed the thermophysical properties of biomass for the kinetics of decomposition estimation. Activation energies reached the values in range of approximately 66.5–167 kJ·mol−1. This research also enables the determination of the temperature conditions required for becoming the desired form of material. Therefore, it is necessary to achieve the requested compact porous structure in an activation process, because in the native state, the polymer exhibits limited applications as a result of thermal decomposition, low shear stress, retrogradation, and syneresis, hence the low solubility in organic solvents. Thermodynamic parameters and reactive hydroxyl groups in this article review are innovative and have not yet been found in the literature.

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