Pyrolysis of high ash sewage sludge: Kinetics and thermodynamic analysis using Coats-Redfern method

Salman Raza Naqvi, Rumaisa Tariq, Zeeshan Hameed, Imtiaz Ali, Muhammad Naqvi, Wei-Hsin Chen, Selim Ceylan, Harith Rashid, Junaid Ahmad, Syed A. Taqvi, Muhammad Shahbaz

研究成果: Article

17 引文 (Scopus)

摘要

This study aims to investigate the thermo-kinetics of high-ash sewage sludge using thermogravimetric analysis. Sewage sludge was dried, pulverized and heated non-isothermally from 25 to 800 °C at different heating rates (5, 10 and 20 °C/min) in N2 atmosphere. TG and DTG results indicate that the sewage sludge pyrolysis may be divided into three stages. Coats-Redfern integral method was applied in the 2nd and 3rd stage to estimate the activation energy and pre-exponential factor from mass loss data using five major reaction mechanisms. The low-temperature stable components (LTSC) of the sewage sludge degraded in the temperature regime of 250–450 °C while high-temperature stable components (HTSC) decomposed in the temperature range of 450–700 °C. According to the results, first-order reaction model (F1) showed higher Ea with better R2 for all heating rates. D3, N1, and S1 produced higher Ea at higher heating rates for LTSC pyrolysis and lower Ea with the increase of heating rates for HTSC pyrolysis. All models showed positive ΔH except F1.5. Among all models, Diffusion (D1, D2, D3) and phase interfacial models (S1, S2) showed higher ΔG as compared to reaction, nucleation, and power-law models in section I and section II.

原文English
頁(從 - 到)854-860
頁數7
期刊Renewable Energy
131
DOIs
出版狀態Published - 2019 二月 1

指紋

Ashes
Sewage sludge
Pyrolysis
Thermodynamics
Heating rate
Kinetics
Temperature
Thermogravimetric analysis
Nucleation
Activation energy

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment

引用此文

Naqvi, Salman Raza ; Tariq, Rumaisa ; Hameed, Zeeshan ; Ali, Imtiaz ; Naqvi, Muhammad ; Chen, Wei-Hsin ; Ceylan, Selim ; Rashid, Harith ; Ahmad, Junaid ; Taqvi, Syed A. ; Shahbaz, Muhammad. / Pyrolysis of high ash sewage sludge : Kinetics and thermodynamic analysis using Coats-Redfern method. 於: Renewable Energy. 2019 ; 卷 131. 頁 854-860.
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abstract = "This study aims to investigate the thermo-kinetics of high-ash sewage sludge using thermogravimetric analysis. Sewage sludge was dried, pulverized and heated non-isothermally from 25 to 800 °C at different heating rates (5, 10 and 20 °C/min) in N2 atmosphere. TG and DTG results indicate that the sewage sludge pyrolysis may be divided into three stages. Coats-Redfern integral method was applied in the 2nd and 3rd stage to estimate the activation energy and pre-exponential factor from mass loss data using five major reaction mechanisms. The low-temperature stable components (LTSC) of the sewage sludge degraded in the temperature regime of 250–450 °C while high-temperature stable components (HTSC) decomposed in the temperature range of 450–700 °C. According to the results, first-order reaction model (F1) showed higher Ea with better R2 for all heating rates. D3, N1, and S1 produced higher Ea at higher heating rates for LTSC pyrolysis and lower Ea with the increase of heating rates for HTSC pyrolysis. All models showed positive ΔH except F1.5. Among all models, Diffusion (D1, D2, D3) and phase interfacial models (S1, S2) showed higher ΔG as compared to reaction, nucleation, and power-law models in section I and section II.",
author = "Naqvi, {Salman Raza} and Rumaisa Tariq and Zeeshan Hameed and Imtiaz Ali and Muhammad Naqvi and Wei-Hsin Chen and Selim Ceylan and Harith Rashid and Junaid Ahmad and Taqvi, {Syed A.} and Muhammad Shahbaz",
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Naqvi, SR, Tariq, R, Hameed, Z, Ali, I, Naqvi, M, Chen, W-H, Ceylan, S, Rashid, H, Ahmad, J, Taqvi, SA & Shahbaz, M 2019, 'Pyrolysis of high ash sewage sludge: Kinetics and thermodynamic analysis using Coats-Redfern method', Renewable Energy, 卷 131, 頁 854-860. https://doi.org/10.1016/j.renene.2018.07.094

Pyrolysis of high ash sewage sludge : Kinetics and thermodynamic analysis using Coats-Redfern method. / Naqvi, Salman Raza; Tariq, Rumaisa; Hameed, Zeeshan; Ali, Imtiaz; Naqvi, Muhammad; Chen, Wei-Hsin; Ceylan, Selim; Rashid, Harith; Ahmad, Junaid; Taqvi, Syed A.; Shahbaz, Muhammad.

於: Renewable Energy, 卷 131, 01.02.2019, p. 854-860.

研究成果: Article

TY - JOUR

T1 - Pyrolysis of high ash sewage sludge

T2 - Kinetics and thermodynamic analysis using Coats-Redfern method

AU - Naqvi, Salman Raza

AU - Tariq, Rumaisa

AU - Hameed, Zeeshan

AU - Ali, Imtiaz

AU - Naqvi, Muhammad

AU - Chen, Wei-Hsin

AU - Ceylan, Selim

AU - Rashid, Harith

AU - Ahmad, Junaid

AU - Taqvi, Syed A.

AU - Shahbaz, Muhammad

PY - 2019/2/1

Y1 - 2019/2/1

N2 - This study aims to investigate the thermo-kinetics of high-ash sewage sludge using thermogravimetric analysis. Sewage sludge was dried, pulverized and heated non-isothermally from 25 to 800 °C at different heating rates (5, 10 and 20 °C/min) in N2 atmosphere. TG and DTG results indicate that the sewage sludge pyrolysis may be divided into three stages. Coats-Redfern integral method was applied in the 2nd and 3rd stage to estimate the activation energy and pre-exponential factor from mass loss data using five major reaction mechanisms. The low-temperature stable components (LTSC) of the sewage sludge degraded in the temperature regime of 250–450 °C while high-temperature stable components (HTSC) decomposed in the temperature range of 450–700 °C. According to the results, first-order reaction model (F1) showed higher Ea with better R2 for all heating rates. D3, N1, and S1 produced higher Ea at higher heating rates for LTSC pyrolysis and lower Ea with the increase of heating rates for HTSC pyrolysis. All models showed positive ΔH except F1.5. Among all models, Diffusion (D1, D2, D3) and phase interfacial models (S1, S2) showed higher ΔG as compared to reaction, nucleation, and power-law models in section I and section II.

AB - This study aims to investigate the thermo-kinetics of high-ash sewage sludge using thermogravimetric analysis. Sewage sludge was dried, pulverized and heated non-isothermally from 25 to 800 °C at different heating rates (5, 10 and 20 °C/min) in N2 atmosphere. TG and DTG results indicate that the sewage sludge pyrolysis may be divided into three stages. Coats-Redfern integral method was applied in the 2nd and 3rd stage to estimate the activation energy and pre-exponential factor from mass loss data using five major reaction mechanisms. The low-temperature stable components (LTSC) of the sewage sludge degraded in the temperature regime of 250–450 °C while high-temperature stable components (HTSC) decomposed in the temperature range of 450–700 °C. According to the results, first-order reaction model (F1) showed higher Ea with better R2 for all heating rates. D3, N1, and S1 produced higher Ea at higher heating rates for LTSC pyrolysis and lower Ea with the increase of heating rates for HTSC pyrolysis. All models showed positive ΔH except F1.5. Among all models, Diffusion (D1, D2, D3) and phase interfacial models (S1, S2) showed higher ΔG as compared to reaction, nucleation, and power-law models in section I and section II.

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