Thermal degradation studies and kinetic modeling of cardoon (Cynara cardunculus) pyrolysis using thermogravimetric analysis (TGA)

The effect of different carbonizing agents; ethylene glycol, glycerol, and pentaerythritol to the char formation were studied in this research. After burning process, formulation with ethylene glycol, glycerol, and pentaerythritol showed chars thickness of 10 mm, 32 mm, and 45 mm. The chars’ strength at peak force was recorded at 3.20 N, 7.75 N, and 9.48 N while the burning rate of each sample were 5.23 x 10-4 mm/s, 4.20 x10-4 mm/s, and 6.24 x10-4 mm/s respectively. Formulation with glycerol as carbonizing agent showed the lowest burning rate as compared to the other formulations. Additional formulation with glycidyl silane as coupling agent in glycerol formulation was also studied. The formation of chemical bonding between silane, glycerol, and epoxy glycerol was confirmed by Fourier Transform Infrared (FTIR) absorption peak at 767.25 cm-1. The burning rate was 1.44 x 10-5 mm/s after silane treatment. Thermal degradation of the silane-treated resin started at 220°C as measured by thermogravimetric analysis (TGA).

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INVESTIGATION OF THERMAL DEGRADATION OF POULTRY PROCESSING DEWATERED SLUDGE USING THERMOGRAVIMETRIC ANALYSIS METHOD

Jurnal Teknologi ◽

10.11113/jt.v76.5522 ◽

2015 ◽

Vol 76 (5) ◽

Author(s):

N. Aniza ◽

S. Hassan ◽

M. F. M. Nor ◽

K. E. Kee ◽

Aklilu T.

Keyword(s):

Particle Size ◽

Thermogravimetric Analysis ◽

Thermal Degradation ◽

Heating Rate ◽

Degradation Process ◽

Heating Rates ◽

Initial Stage ◽

Poultry Processing ◽

Effect Of Particle Size ◽

Dewatered Sludge

Thermal degradation of Poultry Processing Dewatered Sludge (PPDS) was studied using thermogravimetric analysis (TGA) method. The effect of particle size on PPDS samples and operational condition such as heating rates were investigated. The non-isothermal TGA was run under a constant flow of oxygen at a rate of 30 mL/min with temperature ranging from 30ºC to 800ºC. Four sample particle sizes ranging between 0.425 mm to 2 mm, and heating rate between 5 K/min to 20 K/min were used in this study. The TGA results showed that particle size does not have any significant effect on the thermogravimetry (TG) curves at the initial stage, but the TG curves started to separate explicitly at the second stage. Particle size may affect the reactivity of sample and combustion performance due to the heat transfer and temperature gradient. The TG and peak of derivative thermogravimetry (DTG) curves tend to alter at high temperature when heating rate is increased most likely due to the limitation of mass transfer and the delay of degradation process.

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Phosphorous antioxidants against polypropylene thermal degradation during rotational molding-kinetic modeling

Journal of Applied Polymer Science ◽

10.1002/app.41285 ◽

2014 ◽

Vol 132 (3) ◽

pp. n/a-n/a ◽

Cited By ~ 2

Author(s):

Salah Sarrabi ◽

Marie-France Lacrampe ◽

Patricia Krawczak

Keyword(s):

Thermal Degradation ◽

Kinetic Modeling ◽

Rotational Molding

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Non-isothermal degradation kinetics for polycarbonate/ polymethylphenylsilsesquioxane composites

e-Polymers ◽

10.1515/epoly.2010.10.1.1 ◽

2010 ◽

Vol 10 (1) ◽

Cited By ~ 9

Author(s):

Jiangbo Wang ◽

Zhong Xin

Keyword(s):

Activation Energy ◽

Thermogravimetric Analysis ◽

Thermal Degradation ◽

Flame Retardancy ◽

Degradation Kinetics ◽

Degradation Process ◽

Nitrogen Atmosphere ◽

Ozawa Method ◽

Degradation Behaviors ◽

Thermal Degradation Process

AbstractThe thermal degradation behaviors of PC/PMPSQ (polymethylphenylsilsesquioxane) systems were investigated by thermogravimetric analysis (TGA) under non-isothermal conditions in nitrogen atmosphere. During non-isothermal degradation, Kissinger and Flynn-Wall-Ozawa methods were used to analyze the thermal degradation process. The results showed that a remarkable decrease in activation energy ( E ) was observed in the early and middle stages of thermal degradation in the presence of PMPSQ, which indicated that the addition of PMPSQ promoted the thermal degradation of PC. Flynn-Wall-Ozawa method further revealed that PMPSQ significantly increased the activation energy of PC thermal degradation in the final stage, which illustrated that the PMPSQ stabilized the char residues and improved the flame retardancy of PC in the final period of thermal degradation process

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Automated thermal degradation studies on solid σ-organotransition metal complexes: Dimethyl-titanocene, -zirconocene and -hafnocene

Journal of Organometallic Chemistry ◽

10.1016/s0022-328x(00)91543-2 ◽

1976 ◽

Vol 107 (2) ◽

pp. 257-263 ◽

Cited By ~ 30

Author(s):

Helmut G. Alt ◽

Frank P. Di Sanzo ◽

Marvin D. Rausch ◽

Peter C. Uden

Keyword(s):

Thermal Degradation ◽

Metal Complexes ◽

Degradation Studies

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Characterization and thermal degradation kinetics of thermoplastic polyimide based on BAPP

High Performance Polymers ◽

10.1177/0954008317729741 ◽

2017 ◽

Vol 30 (7) ◽

pp. 787-793 ◽

Cited By ~ 4

Author(s):

Xu Su ◽

Yong Xu ◽

Linshuang Li ◽

Chaoran Song

Keyword(s):

Thermogravimetric Analysis ◽

Thermal Degradation ◽

Degradation Kinetics ◽

Degradation Process ◽

Thermal Degradation Kinetics ◽

Heating Rates ◽

Step Method ◽

Nitrogen Derivative ◽

Degradation Reaction ◽

Kinetics Of

Two kinds of thermoplastic polyimides (PIs) were synthesized via a two-step method with 2,2-bis[4-(4-aminophenoxy)phenyl]propane (BAPP), 4,4′-oxydianiline (ODA) diamine, and 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), and their thermal degradation kinetics was studied by thermogravimetric analysis at different heating rates under nitrogen. Derivative thermogravimetric analysis curves indicated a simple, single-stage degradation process in PI BTDA-BAPP and a two-stage degradation process in PI BTDA-ODA-BAPP. The activation energies ( Eas) of the thermal degradation reaction were determined by the Flynn–Wall–Ozawa and Kissinger–Akahira–Sunose methods without a knowledge of the kinetic reaction mechanism. By comparing the values of Ea and weight loss temperatures, it was demonstrated that the thermal stability of PI BTDA-ODA-BAPP was superior to that of PI BTDA-BAPP.

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