Enhanced hydrogen production in catalytic pyrolysis of sewage sludge by red mud: Thermogravimetric kinetic analysis and pyrolysis characteristics

Jiakuan Yang; Xinyu Xu; Sha Liang; Ruonan Guan; Hongsen Li; Ye Chen; Binchuan Liu; Jian Song; Wenbo Yu; Keke Xiao; Huijie Hou; Jingping Hu; Hong Yao; Bo Xiao

doi:10.1016/j.ijhydene.2018.03.018

Enhanced hydrogen production in catalytic pyrolysis of sewage sludge by red mud: Thermogravimetric kinetic analysis and pyrolysis characteristics

Jiakuan Yang, Xinyu Xu, Sha Liang^*, Ruonan Guan, Hongsen Li, Ye Chen, Binchuan Liu, Jian Song, Wenbo Yu, Keke Xiao, Huijie Hou, Jingping Hu, Hong Yao, Bo Xiao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

70 Scopus citations

Abstract

The catalytic mechanism of red mud (RM) on the pyrolysis of sewage sludge was investigated. The thermogravimetric data were used to study the kinetic characteristics by using a discrete distributed activation energy model (DAEM) to clarify the effects of three main components (Fe₂O₃, Al₂O₃, SiO₂) in the RM on the pyrolysis of organic matters in sewage sludge. The modeling results showed that the pyrolysis of organic matters, especially at the higher temperature stage, was promoted by Fe₂O₃ and Al₂O₃ in the RM. Adding Fe₂O₃ or the RM alone could reduce the mean activation energy of sewage sludge pyrolysis by 13.9 and 20.1 kJ mol⁻¹, respectively. The modeling results were validated by pyrolysis experiments of raw sludge with different additives at 600, 700, 800, and 900 °C. The experimental results showed that the addition of Al₂O₃, Fe₂O₃ or the RM could produce more gas than the addition of SiO₂, especially at high temperatures. Fe₂O₃ and Al₂O₃ acted as catalysts in the tar decomposition by in-situ catalyzing the cracking of C–C and C–H bonds to produce more gases. Especially, Fe₂O₃ and Al₂O₃ increased the H₂ yield from sewage sludge pyrolysis at 700, 800, and 900 °C by 268.5 and 50.7%, 111.1 and 56.0%, 10.9 and 10.3%, respectively. The char obtained from pyrolysis of sewage sludge with the RM possessed magnetic property, which has various potential applications. The research indicates that the RM is an efficient catalyst in the pyrolysis of sewage sludge.

Original language	English
Pages (from-to)	7795-7807
Number of pages	13
Journal	International Journal of Hydrogen Energy
Volume	43
Issue number	16
DOIs	https://doi.org/10.1016/j.ijhydene.2018.03.018
State	Published - 19 Apr 2018
Externally published	Yes

Keywords

Catalytic pyrolysis
Discrete distributed activation energy model (discrete DAEM)
Hydrogen production
Red mud
Sewage sludge

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2018.03.018

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Yang, J., Xu, X., Liang, S., Guan, R., Li, H., Chen, Y., Liu, B., Song, J., Yu, W., Xiao, K., Hou, H., Hu, J., Yao, H., & Xiao, B. (2018). Enhanced hydrogen production in catalytic pyrolysis of sewage sludge by red mud: Thermogravimetric kinetic analysis and pyrolysis characteristics. International Journal of Hydrogen Energy, 43(16), 7795-7807. https://doi.org/10.1016/j.ijhydene.2018.03.018

@article{5f2f85d7b85e4611aea31a402ec47b80,

title = "Enhanced hydrogen production in catalytic pyrolysis of sewage sludge by red mud: Thermogravimetric kinetic analysis and pyrolysis characteristics",

abstract = "The catalytic mechanism of red mud (RM) on the pyrolysis of sewage sludge was investigated. The thermogravimetric data were used to study the kinetic characteristics by using a discrete distributed activation energy model (DAEM) to clarify the effects of three main components (Fe2O3, Al2O3, SiO2) in the RM on the pyrolysis of organic matters in sewage sludge. The modeling results showed that the pyrolysis of organic matters, especially at the higher temperature stage, was promoted by Fe2O3 and Al2O3 in the RM. Adding Fe2O3 or the RM alone could reduce the mean activation energy of sewage sludge pyrolysis by 13.9 and 20.1 kJ mol−1, respectively. The modeling results were validated by pyrolysis experiments of raw sludge with different additives at 600, 700, 800, and 900 °C. The experimental results showed that the addition of Al2O3, Fe2O3 or the RM could produce more gas than the addition of SiO2, especially at high temperatures. Fe2O3 and Al2O3 acted as catalysts in the tar decomposition by in-situ catalyzing the cracking of C–C and C–H bonds to produce more gases. Especially, Fe2O3 and Al2O3 increased the H2 yield from sewage sludge pyrolysis at 700, 800, and 900 °C by 268.5 and 50.7%, 111.1 and 56.0%, 10.9 and 10.3%, respectively. The char obtained from pyrolysis of sewage sludge with the RM possessed magnetic property, which has various potential applications. The research indicates that the RM is an efficient catalyst in the pyrolysis of sewage sludge.",

keywords = "Catalytic pyrolysis, Discrete distributed activation energy model (discrete DAEM), Hydrogen production, Red mud, Sewage sludge",

author = "Jiakuan Yang and Xinyu Xu and Sha Liang and Ruonan Guan and Hongsen Li and Ye Chen and Binchuan Liu and Jian Song and Wenbo Yu and Keke Xiao and Huijie Hou and Jingping Hu and Hong Yao and Bo Xiao",

note = "Publisher Copyright: {\textcopyright} 2018 Hydrogen Energy Publications LLC",

year = "2018",

month = apr,

day = "19",

doi = "10.1016/j.ijhydene.2018.03.018",

language = "英语",

volume = "43",

pages = "7795--7807",

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Yang, J, Xu, X, Liang, S, Guan, R, Li, H, Chen, Y, Liu, B, Song, J, Yu, W, Xiao, K, Hou, H, Hu, J, Yao, H & Xiao, B 2018, 'Enhanced hydrogen production in catalytic pyrolysis of sewage sludge by red mud: Thermogravimetric kinetic analysis and pyrolysis characteristics', International Journal of Hydrogen Energy, vol. 43, no. 16, pp. 7795-7807. https://doi.org/10.1016/j.ijhydene.2018.03.018

TY - JOUR

T1 - Enhanced hydrogen production in catalytic pyrolysis of sewage sludge by red mud

T2 - Thermogravimetric kinetic analysis and pyrolysis characteristics

AU - Yang, Jiakuan

AU - Xu, Xinyu

AU - Liang, Sha

AU - Guan, Ruonan

AU - Li, Hongsen

AU - Chen, Ye

AU - Liu, Binchuan

AU - Song, Jian

AU - Yu, Wenbo

AU - Xiao, Keke

AU - Hou, Huijie

AU - Hu, Jingping

AU - Yao, Hong

AU - Xiao, Bo

PY - 2018/4/19

Y1 - 2018/4/19

N2 - The catalytic mechanism of red mud (RM) on the pyrolysis of sewage sludge was investigated. The thermogravimetric data were used to study the kinetic characteristics by using a discrete distributed activation energy model (DAEM) to clarify the effects of three main components (Fe2O3, Al2O3, SiO2) in the RM on the pyrolysis of organic matters in sewage sludge. The modeling results showed that the pyrolysis of organic matters, especially at the higher temperature stage, was promoted by Fe2O3 and Al2O3 in the RM. Adding Fe2O3 or the RM alone could reduce the mean activation energy of sewage sludge pyrolysis by 13.9 and 20.1 kJ mol−1, respectively. The modeling results were validated by pyrolysis experiments of raw sludge with different additives at 600, 700, 800, and 900 °C. The experimental results showed that the addition of Al2O3, Fe2O3 or the RM could produce more gas than the addition of SiO2, especially at high temperatures. Fe2O3 and Al2O3 acted as catalysts in the tar decomposition by in-situ catalyzing the cracking of C–C and C–H bonds to produce more gases. Especially, Fe2O3 and Al2O3 increased the H2 yield from sewage sludge pyrolysis at 700, 800, and 900 °C by 268.5 and 50.7%, 111.1 and 56.0%, 10.9 and 10.3%, respectively. The char obtained from pyrolysis of sewage sludge with the RM possessed magnetic property, which has various potential applications. The research indicates that the RM is an efficient catalyst in the pyrolysis of sewage sludge.

AB - The catalytic mechanism of red mud (RM) on the pyrolysis of sewage sludge was investigated. The thermogravimetric data were used to study the kinetic characteristics by using a discrete distributed activation energy model (DAEM) to clarify the effects of three main components (Fe2O3, Al2O3, SiO2) in the RM on the pyrolysis of organic matters in sewage sludge. The modeling results showed that the pyrolysis of organic matters, especially at the higher temperature stage, was promoted by Fe2O3 and Al2O3 in the RM. Adding Fe2O3 or the RM alone could reduce the mean activation energy of sewage sludge pyrolysis by 13.9 and 20.1 kJ mol−1, respectively. The modeling results were validated by pyrolysis experiments of raw sludge with different additives at 600, 700, 800, and 900 °C. The experimental results showed that the addition of Al2O3, Fe2O3 or the RM could produce more gas than the addition of SiO2, especially at high temperatures. Fe2O3 and Al2O3 acted as catalysts in the tar decomposition by in-situ catalyzing the cracking of C–C and C–H bonds to produce more gases. Especially, Fe2O3 and Al2O3 increased the H2 yield from sewage sludge pyrolysis at 700, 800, and 900 °C by 268.5 and 50.7%, 111.1 and 56.0%, 10.9 and 10.3%, respectively. The char obtained from pyrolysis of sewage sludge with the RM possessed magnetic property, which has various potential applications. The research indicates that the RM is an efficient catalyst in the pyrolysis of sewage sludge.

KW - Catalytic pyrolysis

KW - Discrete distributed activation energy model (discrete DAEM)

KW - Hydrogen production

KW - Red mud

KW - Sewage sludge

UR - http://www.scopus.com/inward/record.url?scp=85044311226&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2018.03.018

DO - 10.1016/j.ijhydene.2018.03.018

M3 - 文章

AN - SCOPUS:85044311226

SN - 0360-3199

VL - 43

SP - 7795

EP - 7807

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 16

ER -

Enhanced hydrogen production in catalytic pyrolysis of sewage sludge by red mud: Thermogravimetric kinetic analysis and pyrolysis characteristics

Abstract

Keywords

UN SDGs

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