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Investigation of Thermal Decomposition and Gases Release from Pre-Drying Municipal Solid Waste (PMSW) Via Pyrolysis Technology

Imtiaz Ali Jamro
Imtiaz Ali Jamro
, 
Salim Khoso
Salim Khoso
, 
Syyed Adnan Raheel Shah
Syyed Adnan Raheel Shah
, 
Sadaquat Ali
Sadaquat Ali
, 
Fahmeed Ali
Fahmeed Ali
 et 
Haseeb Ul Hassane
Haseeb Ul Hassane
   | 03 févr. 2023
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Publié en ligne: 03 févr. 2023
Pages: 119 - 131
Reçu: 19 août 2022
Accepté: 07 nov. 2022
DOI: https://doi.org/10.2478/acee-2022-0043
Mots clés
© 2022 Imtiaz Ali Jamro et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

TGA-MS setup for pyrolysis of the PMSW
TGA-MS setup for pyrolysis of the PMSW

Figure 2

Thermogravimetric (TG) and Differential thermo-gravimetric (DTG) (b) profiles of pyrolysis of PMSW
Thermogravimetric (TG) and Differential thermo-gravimetric (DTG) (b) profiles of pyrolysis of PMSW

Figure 3

The generation rates of (a) H2, (b) CO, and (c) CH4, and (d) their total yields obtained from pyrolysis of PMSW at 5 and 15°C/min.
The generation rates of (a) H2, (b) CO, and (c) CH4, and (d) their total yields obtained from pyrolysis of PMSW at 5 and 15°C/min.

Figure 4

(a) Fitting curves and (b) plots of activation energy obtained from the pyrolysis of PMSW at different conversion degrees at heating rates of 5 and 15°C/min.
(a) Fitting curves and (b) plots of activation energy obtained from the pyrolysis of PMSW at different conversion degrees at heating rates of 5 and 15°C/min.

Figure 5

Experimental (dotted) and model (solid) lines through the FWO method were (a) and (b) show the pyrolysis at 5 and 15°C/min, respectively
Experimental (dotted) and model (solid) lines through the FWO method were (a) and (b) show the pyrolysis at 5 and 15°C/min, respectively

Proximate and ultimate analyses of PMSW

Sample Proximate Analysis (Wt. % db) Ultimate Analysis (Wt. % db)
Moisture content Volatile matters Fixed carbon* Ash C H O* N S
PMSW 11.54 72.28 5.8 10.38 59.86 6.13 32.39 0.61 1.01

Temperature characteristics of the conversion phases obtained from pyrolysis of PMSW

Regime Heating rate (°C/min) Stage 1 Stage 2 Stage 3 Stage 4
Ti (°C) Tmax (°C) Tf (°C) Ti (°C) Tmax (°C) Tf (°C) Ti (°C) Tmax (°C) Tf (°C) Ti (°C) Tmax (°C) Tf (°C)
Pyrolysis 5 50 113 180 230 334 360 360 419 500 605 652 690
15 50 133 182 230 438 515 - - - - - -

Representative gas species evolved and key ion fragments according to their m/z ratio

Representative species Ion fragments m/z ratio
Hydrogen H2+ 2
Methane CH3+ 15
Water H2O+ 18
Carbon monoxide CO+ 28
Ethane C2H+2 28
Argon Ar+ 40
Carbon dioxide CO2+ 44

Kinetic parameters at different conversion rates at heating rates of 5 and 15°C/min

Environment Heating rate (°C/min) Conversion degree (α) Activation energy (kJmol−1) R2
Pyrolysis 5 5 26.2165 0.9972
10 266.1419 0.9722
15 122.3063 0.9967
20 154.2912 0.9839
25 154.6809 0.9849
30 150.212 0.9941
35 142.1621 0.9932
15 5 24.89866 0.9983
10 263.3126 0.9701
15 118.488 0.9949
20 150.2019 0.9811
25 150.4602 0.9935
30 145.8795 0.9922
35 137.6665 0.9917
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Langue:
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