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Waste-Derived Chars: A Comprehensive Review
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| 1.95 MB | Adobe PDF |
Orientador(es)
Resumo(s)
The production of heterogeneous solid waste, such as municipal solid waste (MSW), construction and demolition waste (CDW), and industrial solid waste (ISW), has increased dramatically
in recent decades, and its management is one of today’s biggest concerns. Using waste as a resource
to produce value-added materials such as char is one of the most promising strategies for successful
and sustainable waste management. Virtually any type of waste, through various thermochemical
technologies, including torrefaction, pyrolysis, hydrothermal carbonization, and gasification, can
produce char with potential material and energy applications. Pyrolysis is the most widespread
technology, and there are more studies on producing and applying waste-derived char using this
technology. The properties of waste-derived char seem to be influenced by the conversion technology
and conditions, as well as by the composition of the source waste. A literature search indicated that
the properties of waste-derived char are highly variable with the composition of the raw material,
with carbon content in the range 8–77%, a higher heating value of 2.5–28.4 MJ/kg and a specific
surface area of 0.7–12 m2/g. Depending on the properties of char derived from waste, there are
greater or minor difficulties in applying it, with ash content, heavy metals, and polycyclic aromatic hydrocarbon (PAH) concentrations being some of its limiting properties. Therefore, this review attempts
to compile relevant knowledge on the production of waste-derived char, focusing on heterogeneous
solid waste, applied technologies, and practical application routes in the real world to create a supply
chain, marketing, and use of waste-derived char. Some challenges and prospects for waste-derived
char are also highlighted in this study.
Descrição
Palavras-chave
waste-derived char MSW pyrolysis gasification hydrothermal carbonization
Contexto Educativo
Citação
Santos, S.M.; Gonçalves, M.; Brito, P.; Nobre, C. Waste-Derived Chars: A Comprehensive Review. Waste 2024, 2, 218–239. https:// doi.org/10.3390/waste2030013