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The effect of hydrothermal carbonization (HTC) on entrained flow steam gasification of sewage sludge. Experimental validation of various gasification models
Abstract
Proper sewage sludge management is challenging due to legal requirements, environmental concerns, and logistical complexities. Steam gasification offers a promising solution by producing high-quality syngas. While research has largely focused on fixed bed gasifiers, their scalability limitations restrict their economic viability. Entrained flow gasifiers, scalable to hundreds of megawatts as demonstrated in coal gasification, present a practical alternative for large-scale bioenergy with carbon capture and storage (BECCS) applications. However, designing such systems requires precise modeling approaches. This study experimentally validates equilibrium models and a computational fluid dynamics (CFD) approach for steam gasification of raw sewage sludge and hydrothermally carbonized (HTC) sludge. HTC pretreatment improved syngas quality by facilitating the use of CO2 as a feedstock carrier for entrained flow gasifiers. Among the models tested, the CFD approach and a tuned semi-equilibrium model closely matched experimental data, with average absolute errors of 4.5 % and 2.9 % in mole fraction, respectively. Using a 3-m drop tube furnace, entrained flow steam gasification demonstrated the production of high-quality syngas and offering practical scalability. This scalability enables the development of efficient BECCS power plants with negative CO2 emissions, showcasing the potential of entrained flow gasifiers for sustainable energy and environmental management.
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Authors (14)
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Jakub Mularski
- Wroclaw University of Science and Technology
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Michał Ostrycharczyk
- Wroclaw University of Science and Technology
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Michał Czerep mgr inż
- Wroclaw University of Science and Technology
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Mateusz Wnukowski
- Wroclaw University of Science and Technology
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Krystian Krochmalny mgr
- Wroclaw University of Science and Technology
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Marcin Baranowski
- Wroclaw University of Science and Technology
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Mateusz Kowal mgr
- Wroclaw University of Science and Technology
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Amit Arora mgr inż.
- National Institute of Technology Hamirpur; Shaheed Bhagat Singh State Technical Campus
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Mgr inż Vishwajeet
- Wroclaw University of Science and Technology
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Halina Pawlak-kruczek prof.
- Wroclaw University of Science and Technology
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Lukasz Niedzwiecki
- Wroclaw University of Science and Technology; University of Trento
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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ENERGY
no. 318,
ISSN: 0360-5442 - Language:
- English
- Publication year:
- 2025
- Bibliographic description:
- Mularski J., Stasiak K., Ostrycharczyk M., Czerep M., Wnukowski M., Krochmalny K., Baranowski M., Ziółkowski P., Kowal M., Arora A., Vishwajeet V., Pawlak-kruczek H., Niedzwiecki L., Mikielewicz D.: The effect of hydrothermal carbonization (HTC) on entrained flow steam gasification of sewage sludge. Experimental validation of various gasification models// ENERGY -Vol. 318, (2025), s.134885-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.energy.2025.134885
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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