CIMO - Artigos em Revistas Indexados à WoS/Scopus
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Percorrer CIMO - Artigos em Revistas Indexados à WoS/Scopus por Objetivos de Desenvolvimento Sustentável (ODS) "07:Energias Renováveis e Acessíveis"
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- Comprehensive assessment of PM10 from home heating using different appliances and biomass fuels: Chemical composition, oxidative potential, and ecotoxicityPublication . Cipoli, Yago Alonso; Vicente, Estela D.; Charres, Isabella; Evtyugina, Margarita; Alfosea-Simón, Marina; Lucarelli, Franco; Kováts, Nora; Ryšavý, Jiří; Feliciano, Manuel; Alves, CéliaThe European Union has implemented policies to promote renewable energy, with an emphasis on biomass for heat generation. However, residential biomass combustion is a major source of particulate matter (PM10), and its chemical constituents pose health concerns worldwide. This study characterised the organic and inorganic composition, oxidative potential (OP), and ecotoxicity of PM10 indoors and outdoors during the operation of two heating appliances fuelled with different types of biomasses: a modern hydronic stove and a traditional wood stove. PM10 concentrations were higher in the room equipped with the traditional system during the combustion of briquettes (95.9 f 74.9 mu g m-3) and firewood (50.1 f 25.6 mu g m- 3), compared to the modern stove using pellets (27.1 f 11.8 mu g m-3) and olive stone (23.0 f 4.5 mu g m- 3). While element oxides accounted for similar PM10 mass fractions (7 %), the wood stove produced higher levels of organic constituents, including carbonaceous fractions, polycyclic aromatic hydrocarbons (PAHs), quinones and saccharides. Significant correlations between OP assays and concentrations of PAHs, quinones and phenolic compounds were found in the room equipped with wood stove, with indoor to outdoor (I/O) ratios higher than 1. In contrast, I/O ratios below 1 were observed for OP in PM10 samples collected during hydronic stove operation. Ecotoxicity assays using Aliivibrio fischeri classified indoor PM10 from the wood stove as 'very toxic', whereas samples from the hydronic stove exhibited lower toxicity and OP levels. These findings highlight the need to reconcile renewable energy goals with air quality and public health.
- Experimental study of thermo-environmental properties of single and double-chambered bioethanol burnersPublication . Ryšavý, Jiří; Vicente, Estela Alexandra Domingos; Molchanov, Oleksandr; Cipoli, Yago Alonso; Krpec, Kamil; Alves, Célia A.; Feliciano, Manuel; Dargham, Imane; Kuo, Jenn-Kun; Wang, Cheng-ChiBioethanol burners are becoming increasingly popular across Europe, often valued primarily for their aesthetic appeal; however, their potential role in household energy systems and their influence on the indoor environment have been largely overlooked. This study aimed to evaluate the effects of burner design, burner opening area regulation, fuel quality, and initial fuel dose on key operational and environmental performance metrics, including heat output, pollutant emission rates, and impact on indoor environment, for single- and doublechambered bioethanol burners. The results showed that single-chambered burners achieved 11-31 % higher average heat output and 8-27 % higher maximum heat output despite having a lower burner opening area. Regarding emissions, single-chambered burners exhibited lower CO emission factors (5-51 % reduction) but higher NOx emission factors (13-23 % increase) compared to double-chambered burners. Indoors, a similar trend was observed, with single-chambered burners contributing to lower CO levels but higher NOx concentrations. These findings provide new insights into how burner geometry directly affects combustion efficiency and pollutant formation mechanisms, including thermal NOx and incomplete combustion processes. This study is one of the few to combine controlled hood testing with real-room experiments, offering a comprehensive assessment of the indoor air quality implications of ethanol burner operation. The results of this study highlight the necessity for further research and development to mitigate potential health risks while maximising the efficiency of bioethanol burners as a viable household heating solution.
- Integrated experimental, process simulation, and techno-economic assessment of biogas upgrading via pressure/vacuum swing adsorptionPublication . Karimi, Mohsen; Siqueira, Rafael M.; Shirzad, Mohammad; Ferreira, Alexandre F.P.; Rodrigues, Alírio; Silva, José A.C.This study presents an integrated approach in biogas upgrading technology through the development and optimization of a shaped MIL-160(Al)-based pressure/vacuum swing adsorption (PSA/VPSA) system. Combining detailed experimental investigations with comprehensive process modeling and techno-economic analysis, we demonstrate a complete pathway from fundamental dynamic adsorption to industrial implementation. Breakthrough tests reveal notable CO2/CH2 separation performance with shaped MIL-160(Al), while 23 cyclic PSA experiments achieved over 90 % methane purity. Advanced process modeling, validated with less than 5 % deviation from experimental data, enables successful scale-up to industrial VPSA configurations, where 38 distinct cases were evaluated to identify an optimal system producing 99.81 % pipeline-quality biomethane with 92.6 % recovery. Our holistic techno-economic assessment reveals the system's acceptable economic viability, with the total capital expenditure (CapEx) of $14.33 million. Accordingly, this work provides clear methodological insights that strengthen the understanding of MIL-160(Al)-based PSA/VPSA process and support its potential application for biogas upgrading.