Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance

This study provides mechanistic insights into the role of rice-husk-derived activated carbon (AC:Y, 5–25 wt%) during co-hydrothermal carbonization (co-HTC) of sewage sludge (SS) and lignin-rich lignocellulose (LC:X, 5–25 wt%) at 200 ◦C for 60 min, followed by pyrolysis of the resulting hydrochars (H...

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Autores: Rizwan, Muhammad, Leghari, Asma, Mansoor, Adil, Sadiq, Hammad, Ali, Muhammad Frayad, Wang, Mingzhi, Song, Yueqin, Nawaz, Muhammad Asif, Zhou, Xiaolong
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2026
País:España
Recursos:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:dnet:idus________::03a57dc1afc527fa40b8ade7d42b92f3
Acesso em linha:https://hdl.handle.net/11441/186259
https://doi.org/10.1016/j.scca.2026.100188
Access Level:acceso abierto
Palavra-chave:Activated carbon
Co-hydrothermal carbonization
Hydrochar
Lignocellulose
Pyrolysis
Sewage sludge
Syngas production
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spelling Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performanceRizwan, MuhammadLeghari, AsmaMansoor, AdilSadiq, HammadAli, Muhammad FrayadWang, MingzhiSong, YueqinNawaz, Muhammad AsifZhou, XiaolongActivated carbonCo-hydrothermal carbonizationHydrocharLignocellulosePyrolysisSewage sludgeSyngas productionThis study provides mechanistic insights into the role of rice-husk-derived activated carbon (AC:Y, 5–25 wt%) during co-hydrothermal carbonization (co-HTC) of sewage sludge (SS) and lignin-rich lignocellulose (LC:X, 5–25 wt%) at 200 ◦C for 60 min, followed by pyrolysis of the resulting hydrochars (HCs) between 500 ◦C-900 ◦C. Comprehensive characterization (FTIR, Raman, XPS, BET, SEM, TGA) of HC revealed that Y significantly enhanced its fuel quality and structural re-ordering. The optimized sample (SS-5X-5Y) showed higher carbon content (47.51 ± 0.092 %) and higher heating value (HHV:18.67 ± 0.038 MJ⋅kg⁻¹), and SS-25X-25Y demonstrated reduced ash content (24.60 ± 0.067 %) compared to SS-X alone. FTIR confirmed the presence of C=O (~1700 cm⁻¹), aromatic C=C (~1590 cm⁻¹), C–O (1200–1050 cm⁻¹), and S=O (~1100–1050 cm⁻¹) functionalities. Raman (ID/IG ↓ from 0.60 to 0.47) and XPS (C–C up to 78 %) indicated enhanced aromatic condensation and deoxygenation induced by Y. Pyrolytic products indicated that Y-mediated HCs promoted syngas-rich products, achieving 33–35 vol% H₂ and 45–49 vol% CO at 900 ◦C. This study establishes a robust framework for future investigation, particularly long-term combustion/gasification evaluations and detailed leaching behavior analysis, which will further validate the environmental stability, operational reliability, and broader techno-economic potential of Y-mediated HCs.ElsevierQuímica InorgánicaMinisterio de Ciencia e Innovación (MICIN). España2026info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/186259https://doi.org/10.1016/j.scca.2026.100188reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésSustainable Chemistry for Climate Action, 8, 100188. GA-101144144info:eu-repo/semantics/openAccessoai:dnet:idus________::03a57dc1afc527fa40b8ade7d42b92f32026-06-17T12:51:07Z
dc.title.none.fl_str_mv Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
title Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
spellingShingle Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
Rizwan, Muhammad
Activated carbon
Co-hydrothermal carbonization
Hydrochar
Lignocellulose
Pyrolysis
Sewage sludge
Syngas production
title_short Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
title_full Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
title_fullStr Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
title_full_unstemmed Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
title_sort Synergistic valorization of sewage sludge and lignin-rich lignocellulose via activated carbon-mediated Co-HTC: Enhancing hydrochar quality and its pyrolysis performance
dc.creator.none.fl_str_mv Rizwan, Muhammad
Leghari, Asma
Mansoor, Adil
Sadiq, Hammad
Ali, Muhammad Frayad
Wang, Mingzhi
Song, Yueqin
Nawaz, Muhammad Asif
Zhou, Xiaolong
author Rizwan, Muhammad
author_facet Rizwan, Muhammad
Leghari, Asma
Mansoor, Adil
Sadiq, Hammad
Ali, Muhammad Frayad
Wang, Mingzhi
Song, Yueqin
Nawaz, Muhammad Asif
Zhou, Xiaolong
author_role author
author2 Leghari, Asma
Mansoor, Adil
Sadiq, Hammad
Ali, Muhammad Frayad
Wang, Mingzhi
Song, Yueqin
Nawaz, Muhammad Asif
Zhou, Xiaolong
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Química Inorgánica
Ministerio de Ciencia e Innovación (MICIN). España
dc.subject.none.fl_str_mv Activated carbon
Co-hydrothermal carbonization
Hydrochar
Lignocellulose
Pyrolysis
Sewage sludge
Syngas production
topic Activated carbon
Co-hydrothermal carbonization
Hydrochar
Lignocellulose
Pyrolysis
Sewage sludge
Syngas production
description This study provides mechanistic insights into the role of rice-husk-derived activated carbon (AC:Y, 5–25 wt%) during co-hydrothermal carbonization (co-HTC) of sewage sludge (SS) and lignin-rich lignocellulose (LC:X, 5–25 wt%) at 200 ◦C for 60 min, followed by pyrolysis of the resulting hydrochars (HCs) between 500 ◦C-900 ◦C. Comprehensive characterization (FTIR, Raman, XPS, BET, SEM, TGA) of HC revealed that Y significantly enhanced its fuel quality and structural re-ordering. The optimized sample (SS-5X-5Y) showed higher carbon content (47.51 ± 0.092 %) and higher heating value (HHV:18.67 ± 0.038 MJ⋅kg⁻¹), and SS-25X-25Y demonstrated reduced ash content (24.60 ± 0.067 %) compared to SS-X alone. FTIR confirmed the presence of C=O (~1700 cm⁻¹), aromatic C=C (~1590 cm⁻¹), C–O (1200–1050 cm⁻¹), and S=O (~1100–1050 cm⁻¹) functionalities. Raman (ID/IG ↓ from 0.60 to 0.47) and XPS (C–C up to 78 %) indicated enhanced aromatic condensation and deoxygenation induced by Y. Pyrolytic products indicated that Y-mediated HCs promoted syngas-rich products, achieving 33–35 vol% H₂ and 45–49 vol% CO at 900 ◦C. This study establishes a robust framework for future investigation, particularly long-term combustion/gasification evaluations and detailed leaching behavior analysis, which will further validate the environmental stability, operational reliability, and broader techno-economic potential of Y-mediated HCs.
publishDate 2026
dc.date.none.fl_str_mv 2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/186259
https://doi.org/10.1016/j.scca.2026.100188
url https://hdl.handle.net/11441/186259
https://doi.org/10.1016/j.scca.2026.100188
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sustainable Chemistry for Climate Action, 8, 100188.
GA-101144144
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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