Search Results - "Puna, Jaime"

Biodiesel Production Processes and Sustainable Raw Materials by Ramos, Marta, Dias, Ana Paula Soares, Puna, Jaime Filipe, Gomes, João, Bordado, João Carlos

“…Energy security and environmental concerns, related to the increasing carbon emissions, have prompted in the last years the search for renewable and…”
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A review on bio-based catalysts (immobilized enzymes) used for biodiesel production by Pereira dos Santos, Samuel, Puna, Jaime, Gomes, João

“…The continuous increase of the world's population results in an increased demand for energy drastically from the industrial and domestic sectors as well…”
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Study on the use of MgAl hydrotalcites as solid heterogeneous catalysts for biodiesel production by Gomes, João F.P., Puna, Jaime F.B., Gonçalves, Lissa M., Bordado, João C.M.

“…This paper, reports experimental work on the use of new heterogeneous solid basic catalysts for biodiesel production: double oxides of Mg and Al, produced by…”
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A brief review of the supercritical antisolvent (SAS) technique for the preparation of nanocatalysts to be used in biodiesel production by Pereira dos Santos, Samuel, Puna, Jaime, Gomes, João

“…In an era where sustainability is becoming the main driving force for research and development, supercritical fluids-based techniques are presented as a very…”
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Towards the Development of Syngas/Biomethane Electrolytic Production, Using Liquefied Biomass and Heterogeneous Catalyst by Gonçalves, Ana, Puna, Jaime Filipe, Guerra, Luís, Campos Rodrigues, José, Gomes, João Fernando, Santos, Maria Teresa, Alves, Diogo

“…This paper presents results on the research currently being carried out with the objective of developing new electrochemistry-based processes to produce…”
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Biodiesel production over lithium modified lime catalysts: Activity and deactivation by Puna, Jaime F., Gomes, João F., Bordado, João C., Correia, M. Joana Neiva, Dias, Ana Paula Soares

“…•Biodiesel from rapeseed oil was produced over lithium modified CaO catalysts.•Lithium improve the surface basicity by formation of electron defects.•The…”
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Unlocking Nature’s Potential: Modelling Acacia melanoxylon as a Renewable Resource for Bio-Oil Production through Thermochemical Liquefaction by Ozkan, Sila, Sousa, Henrique, Gonçalves, Diogo, Puna, Jaime, Carvalho, Ana, Bordado, João, dos Santos, Rui Galhano, Gomes, João

“…This study is focused on the modelling of the production of bio-oil by thermochemical liquefaction. Species Acacia melanoxylon was used as the source of…”
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Clean forest—project concept and early results by Gomes, João, Puna, Jaime, Marques, António, Gominho, Jorge, Lourenço, Ana, Galhano dos Santos, Rui, Ozkan, Sila

“…The Clean Forest project aims to valorize forest biomass wastes (and then prevent their occurrence as a fuel source in forests), converting it to bioenergy,…”
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Solvent Assisted Biodiesel Production by Co-processing Beef Tallow and Soybean Oil Over Calcium Catalysts by Soares Dias, Ana Paula, Ramos, Marta, Catarino, Mónica, Puna, Jaime, Gomes, João

“…Due to sustainability issues, biodiesel must be produced from low-grade fats and the conventional homogeneously-catalyzed processes must be replaced by more…”
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Effect of the oil acidity on the methanolysis performances of lime catalyst biodiesel from waste frying oils (WFO) by Soares Dias, Ana Paula, Puna, Jaime, Neiva Correia, Maria Joana, Nogueira, Isabel, Gomes, João, Bordado, João

“…Biodiesel is a renewable fuel suitable to replace fossil fuel which can help to mitigate the carbon footprint of the transportation sector. Its price is still…”
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Life cycle analysis of a combined electrolysis and methanation reactor for methane production by Federici, Flavio, Puna, Jaime, Mata, Teresa M., Martins, António A.

“…The need to decarbonize industrial processes and to increase the utilization of renewable resources, either energy and raw materials, has led to the…”
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Modelling of burnt pine heartwood acid-catalysed liquefaction by Ozkan, Sila, Azevedo Gonçalves, Diogo Filipe, Paulo, Ivo, Queirós, Carla S. G. P., Carvalho, Ana, Puna, Jaime, Gomes, João, Bordado, João, Galhano dos Santos, Rui

“…This study focused on bio-oil production by thermochemical liquefaction. For the reaction, the burnt pine heartwood was used as feedstock material,…”
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Status of biodiesel production using heterogeneous alkaline catalysts by Gomes, João F.P, Puna, Jaime F.B, Bordado, João C.M, Correia, M. Joana N, Dias, Ana P.S

“…This paper describes biodiesel production using heterogeneous alkaline catalysts instead of the conventional homogenous alkaline catalysts, such as NaOH, KOH…”
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Catalyzed pyrolysis of coffee and tea wastes by Rijo, Bruna, Soares Dias, Ana Paula, Ramos, Marta, de Jesus, Nicole, Puna, Jaime

“…The pyrolysis of food waste has a double environmental advantage as it contributes to the management and treatment of waste and allows the production of…”
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Biodiesel production over lime. Catalytic contributions of bulk phases and surface Ca species formed during reaction by Soares Dias, Ana Paula, Puna, Jaime, Gomes, João, Neiva Correia, Maria Joana, Bordado, João

“…Lime is pointed out as an effective catalyst for biodiesel production by oil methanolysis. Several Ca phases are formed during reaction. Each Ca phase has…”
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Soybean Oil Transesterification for Biodiesel Production with Micro-Structured Calcium Oxide (CaO) from Natural Waste Materials as a Heterogeneous Catalyst by Santos, Samuel, Nobre, Luís, Gomes, João, Puna, Jaime, Quinta-Ferreira, Rosa, Bordado, João

“…In this study, micro-structured calcium oxide obtained from the calcination (850 °C for 3 h) of Gallus gallus domesticus (chicken) eggshells was used as a…”
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The role of Alkali dopants on the Oil Methanolysis Behavior of Lime Catalyst: Activity & Stability by Soares Dias, Ana Paula, Puna, Jaime, Gomes, João, Ramos, Marta, Rijo, Bruna, Bordado, João

“…Heterogeneous basic catalysts, namely calcium oxide, are referred to as promising catalysts for biodiesel (FAME, fatty acid methyl esters) production since…”
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Preliminary study of synthesis gas production from water electrolysis, using the ELECTROFUEL® concept by Guerra, L., Gomes, J., Puna, J., Rodrigues, J.

“…This paper describes preliminary work on the generation of synthesis gas from water electrolysis using graphite electrodes without the separation of the…”
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Preliminary Study on the Use of Biodiesel Obtained from Waste Vegetable Oils for Blending with Hydrotreated Kerosene Fossil Fuel Using Calcium Oxide (CaO) from Natural Waste Materials as Heterogeneous Catalyst by Ozkan, S., Puna, J. F., Gomes, J. F., Cabrita, T., Palmeira, J. V., Santos, M. T.

“…In this experimental work, calcium from natural seafood wastes was used as a heterogeneous catalyst separately or in a blend of “shell mix” for producing…”
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Calcium Rich Food Wastes Based Catalysts for Biodiesel Production by Catarino, M., Ramos, M., Dias, A. P. Soares, Santos, M. T., Puna, J. F., Gomes, J. F.

“…Biodiesel produced from food wastes can help to solve several environmental issues: anthropogenic carbon emissions due to fossil fuels combustion and waste…”
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