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Pyrolysis characteristics and kinetic studies of horse manure using thermogravimetric analysis

Pyrolysis characteristics and kinetic studies of horse manure using thermogravimetric analysis
Pyrolysis characteristics and kinetic studies of horse manure using thermogravimetric analysis

Horse manure is a biowaste with bioenergy recovery potential for heat and power generation. However, there is no kinetics data in literature to date. In this work, a kinetic study of the pyrolysis process of horse manure is investigated through the use of thermogravimetric analyses. The samples were heated over a range of temperature from 298 to 927 K with four different heating rates of 1, 2, 5 and 10 K/min. The weight loss was measured by a thermogravimetric analyser in an inert atmosphere. The differential thermal gravimetric (DTG) thermogram shows that the highest reaction rate occurred at between 290.2 and 329.6 °C where the devolatilisation process was initiated to overcome the activation energy barrier of the manure. The activation energy and pre-exponential factor obtained by the Kissinger method, assumed to be constant throughout the whole pyrolysis process are 149 kJ/mol and 3.3 × 1012 s−1, respectively. The activation energy calculated from the non-isothermal Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS) and Friedman methods are 199.3, 200.2 and 194.6 kJ/mol, whereas the pre-exponential values are 9.3 × 1018, 1.8 × 1019 and 3.6 × 1020 s−1, respectively. The kinetic parameters determined based on interval conversional fraction shows good agreement. The high volatile and low ash content in horse manure indicates the potential for bioenergy recovery. The results of the kinetic study can be used for modelling devolatilisation and designing thermochemical conversion processes.

Horse manure, Isoconversional method, Kinetic analysis, Pyrolysis, Thermogravimetric analysis
0196-8904
1260-1267
Chong, Cheng Tung
65b12c86-8a3e-45e8-873c-7db0c8b2cbd9
Mong, Guo Ren
4fa5db8e-6b00-4bb8-9dd0-1b7b85e51452
Ng, Jo Han
4c9c51bd-1cfc-46c0-b519-23b77566fe50
Chong, William Woei Fong
bb7bc2ce-1866-4fb0-8b82-5a6d2381b67a
Ani, Farid Nasir
cff6b53c-8c2c-44b4-bb02-c962757eb2f2
Lam, Su Shiung
6b37a05e-d996-499c-8847-06a8fea295a7
Ong, Hwai Chyuan
efb62a79-6d27-4c19-8292-99e591ec2e7b
Chong, Cheng Tung
65b12c86-8a3e-45e8-873c-7db0c8b2cbd9
Mong, Guo Ren
4fa5db8e-6b00-4bb8-9dd0-1b7b85e51452
Ng, Jo Han
4c9c51bd-1cfc-46c0-b519-23b77566fe50
Chong, William Woei Fong
bb7bc2ce-1866-4fb0-8b82-5a6d2381b67a
Ani, Farid Nasir
cff6b53c-8c2c-44b4-bb02-c962757eb2f2
Lam, Su Shiung
6b37a05e-d996-499c-8847-06a8fea295a7
Ong, Hwai Chyuan
efb62a79-6d27-4c19-8292-99e591ec2e7b

Chong, Cheng Tung, Mong, Guo Ren, Ng, Jo Han, Chong, William Woei Fong, Ani, Farid Nasir, Lam, Su Shiung and Ong, Hwai Chyuan (2019) Pyrolysis characteristics and kinetic studies of horse manure using thermogravimetric analysis. Energy Conversion and Management, 1260-1267. (doi:10.1016/j.enconman.2018.11.071).

Record type: Article

Abstract

Horse manure is a biowaste with bioenergy recovery potential for heat and power generation. However, there is no kinetics data in literature to date. In this work, a kinetic study of the pyrolysis process of horse manure is investigated through the use of thermogravimetric analyses. The samples were heated over a range of temperature from 298 to 927 K with four different heating rates of 1, 2, 5 and 10 K/min. The weight loss was measured by a thermogravimetric analyser in an inert atmosphere. The differential thermal gravimetric (DTG) thermogram shows that the highest reaction rate occurred at between 290.2 and 329.6 °C where the devolatilisation process was initiated to overcome the activation energy barrier of the manure. The activation energy and pre-exponential factor obtained by the Kissinger method, assumed to be constant throughout the whole pyrolysis process are 149 kJ/mol and 3.3 × 1012 s−1, respectively. The activation energy calculated from the non-isothermal Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS) and Friedman methods are 199.3, 200.2 and 194.6 kJ/mol, whereas the pre-exponential values are 9.3 × 1018, 1.8 × 1019 and 3.6 × 1020 s−1, respectively. The kinetic parameters determined based on interval conversional fraction shows good agreement. The high volatile and low ash content in horse manure indicates the potential for bioenergy recovery. The results of the kinetic study can be used for modelling devolatilisation and designing thermochemical conversion processes.

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More information

Accepted/In Press date: 27 November 2018
e-pub ahead of print date: 11 December 2018
Published date: 15 January 2019
Keywords: Horse manure, Isoconversional method, Kinetic analysis, Pyrolysis, Thermogravimetric analysis

Identifiers

Local EPrints ID: 432448
URI: https://eprints.soton.ac.uk/id/eprint/432448
ISSN: 0196-8904
PURE UUID: a62b0d70-3afa-4180-9458-d0563f1f806c

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Date deposited: 16 Jul 2019 16:30
Last modified: 16 Jul 2019 16:30

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Contributors

Author: Cheng Tung Chong
Author: Guo Ren Mong
Author: Jo Han Ng
Author: William Woei Fong Chong
Author: Farid Nasir Ani
Author: Su Shiung Lam
Author: Hwai Chyuan Ong

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