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Percorrer ENERGIA por Domínios Científicos e Tecnológicos (FOS) "Ciências Naturais::Ciências da Terra e do Ambiente"
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- Development of a georeferenced database as a tool to improve circular material flows in lignocellulosic waste valorization [Poster]Publication . Silva, Tiago; Eusebio, Ana; Camocho, David; Alexandre, Jorge; Sousa Rocha, Cristina; Patinha, Pedro; Quental, Lídia; Gírio, Francisco; Moura, PatríciaABSTRACT: The Frontsh1p project aims to accelerate the development and implementation of cross-sector circular value chains through the creation of a multi-level toolkit that includes georeferenced data. This will facilitate the identification of the different stakeholders, their levels of interaction, regional distribution, and communication pathways, as well as the planning of new circular material flows for by-products and waste streams. The region of Łódzkie in Poland was selected for the development of this toolkit to establish guidelines, methodologies and technologies, based on information at the regional economic level, that can be easily replicated in different regions across Europe.
- Mapping less sensitive areas with a view to the potential installation of solar and wind electricity generation units [Comunicação oral]Publication . Simoes, Sofia; Barbosa, Juliana Pacheco; Oliveira, Paula; Simões, Teresa; Quental, Lídia; Costa, Paula; Picado, Ana; Catarino, Justina; Patinha, Pedro
- Revisão sistemática sobre a aceitação social da mineração no contexto da transição energéticaPublication . Santos, Elaine; Simoes, SofiaRESUMO: Este relatório técnico apresenta uma revisão sistemática da literatura científica sobre a aceitação social da mineração no contexto da transição energética. A análise abrangeu 118 publicações entre 1998 e 2025, em inglês, português e espanhol, integrando métodos quantitativos e qualitativos. Os resultados evidenciam o crescimento no campo (7,47% ao ano) e revelam os seguintes fatores centrais para a aceitação social, como participação comunitária, transparência, justiça procedimental, confiança institucional e gestão de conflitos. Identificam-se diferenças regionais: na Europa, a ênfase recai sobre governação e transparência, enquanto na América Latina prevalecem justiça socioambiental e conflitos e expetativas. Apesar da centralidade dos minerais críticos para a transição energética, poucos estudos articulam explicitamente os dois temas. O relatório propõe recomendações para decisores, empresas e comunidades, visando práticas mais participativas. Trata-se do primeiro estudo do LNEG sobre esta temática, contribuindo para políticas públicas e estratégias institucionais no setor mineiro.
- Systematic review on social acceptance of mining in the context of the energy transitionPublication . Santos, Elaine; Simoes, SofiaABSTRACT: This technical report presents a systematic review of the scientific literature on the social acceptance of mining in the context of the energy transition. The analysis covered 118 publications from 1998 to 2025 in English, Portuguese, and Spanish, integrating quantitative and qualitative methods. The results show the growth of the field (7.47% per year) and reveal the following central factors for social acceptance: community participation, transparency, procedural justice, institutional trust, and conflict management. Regional differences were identified: in Europe, the emphasis falls on governance and transparency, whereas in Latin America socio-environmental justice, conflicts, and expectations prevail. Despite the centrality of critical minerals for the energy transition, few studies explicitly articulate both themes. The report proposes recommendations for policymakers, companies, and communities, aiming at more participatory practices. This is the first LNEG study on this topic, contributing to public policies and institutional strategies in the mining sector.
- Thermoelectric Properties of Tetrahedrites Produced from Mixtures of Natural and Synthetic MaterialsPublication . Santos, Beatriz; Esperto, Luís; Figueira Vasques, Isabel; Mascarenhas, João; Lopes, E.B.; Salgueiro, Rute; Silva, Teresa; Correia, Jose B.; de Oliveira, Daniel Pipa Soares; Pereira Gonçalves, Antonio; Neves, FilipeABSTRACT: Thermoelectric materials have considerable potential in the mitigation of the global energy crisis, through their ability to convert heat into electricity. This study aims to valorize natural resources, and potentially reduce production costs, by incorporating tetrahedrite-tennantite (td) ores from the Portuguese Iberian Pyrite Belt into synthetic samples. The ore samples were collected in a mine waste at Barrig & atilde;o and as "dirty-copper" pockets of ore from the Neves Corvo mine. Subsequently, high-energy ball milling and hot pressing were employed in the production of thermoelectric materials. These are characterized by XRD, SEM/EDS, and thermoelectrical properties. The complete dissolution of the dump material sulfides with the synthetic tetrahedrite constituents led to an increase in the amount of the tetrahedrite-tennantite phase, which was made up of a tetrahedrite-tennantite-(Fe) solid solution. The thermoelectric characterization of these materials is provided, revealing that most of the combined synthetic ore samples displayed better results than the pristine tetrahedrite, mostly due to higher Seebeck coefficient values. Furthermore, the best thermoelectric performance is achieved with 10% of ore, where a power factor of 268 mu W.K-2.m-1 is reached at room temperature.