263 documents found, page 1 of 27
PRODUCTION OF WASTES IN A SMALL COUNTRY: PORTUGAL CASE STUDY
Assis, Carolina; Panizio, Roberta; Nobre, Catarina; Mourão, Paulo; Brito, PauloThis research delves into the landscape of Municipal Solid Waste (MSW) production and management in Portugal, shedding light on the intricate dynamics of waste generation, disposal, and recovery. The universal challenge of MSW management is accentuated, considering its substantial impact on the environment and the economy. In 2021, MSW comprised 28% of the total waste produced in mainland Portugal, emphasizing ...
Cork waste-based adsorbents for glycerol removal from biodiesel: a sustainable ...
Garção, Maria Isabella Lima; Milani, Eduardo Candido; Camilo, Gabriel Lamino; Diaz De Tuesta, Jose L.; Gomes, Maria Carolina Sérgi; Ribeiro, António E.This work aims to use activated carbon from industrial cork waste as a novel method for glycerol removal from crude biodiesel produced using waste cooking oil, combining two residues to obtain both high-quality biodiesel and highly adsorbent activated carbon. The study first optimizes the biodiesel production conditions, achieving the highest ester yield at 30 degrees C, with a 1:9 oil-to-ethanol molar ratio, 1...
Production and characterization of different green adsorbents for the removal o...
Guimarães, Miriam Domingues; De Prá, Marina Celant; Queiroz, Ana; Ribeiro, António E.; Brito, PauloThere is environmental concern due to the high use of oil as a primary fuel, which results in a significant emission of polluting gases, and one of the most promising solutions involves replacing it with biodiesel. Biodiesel is a fuel that can be produced using waste cooking oil (WCO) and has become an excellent alternative to ordinary diesel. A crucial stage in the production of biodiesel is the purification p...
Enhancing CO2/N2 and CO2/CH4 Separation Properties of PES/SAPO-34 Membranes Usi...
Cardoso, Jonathan S.; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M.CO2 separation is an important environmental method mainly used in reducing CO2 emissions to mitigate anthropogenic climate change. The use of mixed-matrix membranes (MMMs) arrives as a possible answer, combining the high selectivity of inorganic membranes with high permeability of organic membranes. However, the combination of these materials is challenging due to their opposing nature, leading to poor interac...
Review of biodiesel production using various feedstocks and its purification th...
Camilo, Gabriel L.; Queiroz, Ana; Ribeiro, António E.; Gomes, Maria Carolina Sérgi; Brito, PauloRenewable biomass fuels are gaining attention as a cleaner energy alternative to fossil-based resources. Biodiesel, derived from biological sources, is particularly attractive due to its renewable and ecological benefits. Researchers are actively exploring various methodologies to convert biomass into gaseous and liquid fuels, similar to petroleum products. To optimize production and accommodate different feeds...
Optimization and performance studies of PES/SAPO-34 membranes for CO2/N2 gas se...
Cardoso, Jonathan; Fonseca, Joel P.; Lin, Zhi; Brito, Paulo; Gando-Ferreira, Licínio M.SAPO-34 nanocrystals were prepared and used as inorganic filler in polyethersulfone (PES) membranes. The influence of preparation conditions on permeation properties of CO2 and N2 gases and CO2/N2 selectivity were studied to achieve the highest separation performance possible for this mixed-matrix membrane. Gas permeation properties of PES/SAPO-34 MMMs with different contents of SAPO-34, PES and initial film th...
Use of By-Products from Gasification and Carbonization from Polymeric Residues ...
Assis, Ana; Panizio, Roberta; Calado, Luis; Brito, Paulo; Mourão, PauloThe search for strategies that contribute to circular economy, based on the valorization of by-products of the most diverse industries and processes, is one of the main environmental objectives at present. This study aims to evaluate the possibility of valorizing by-products from the gasification and carbonization of polymeric residues and biomass of natural origin through their application in adsorption proces...
Evaluation of the Possibility to Use By-Products of Gasification and Carbonizat...
Assis, Ana; Calado, Luis; Panizio, Roberta; Matos, Vítor; Calado, Helena; Brito, Paulo; Mourão, PauloThe search for strategies that contribute to a circular economy, based on the valorization of by-products of the most diverse industries and processes, is one of the main objectives nowadays. This study aims to evaluate the possibility of the by-products valorization, resulting from gasification and carbonization of polymeric residues and biomass of natural origin, through their application in adsorption proces...
Solar Driven Syngas Production Potential in Portugal
Horta, Pedro; Canavarro, Diogo; Camilo Alves, Constança; Brito, Paulo; Panizio, RobertaThe production of synthesis gas, or syngas, from the thermochemical conversion of different carbon-based feedstocks, including biomass, is an important alternative for the conversion of waste from sources such as agroforestry or urban waste into renewable gases or fuels. The use of solar radiation as an energy source for these thermochemical processes can reduce or even eliminate their environmental impacts and...
Potential for hydrogen production associated to water and food in off-grid comm...
Rodrigues, Luiz; Araujo, Luis; Gano, António; Pinto, P.J.R.; Simoes, Sofia; Brito, Paulo; Monjane, Armindo; Rangel, C. M.ABSTRACT: Solar energy is called to meet electricity demands for isolated, off-grid communities in Africa. However, solar electric energy is intermittent and can be stored, for a limited amount of time, in batteries, which are expensive and cause serious environmental impacts at the end of their lifetime. Conversion of the surplus electric energy to green hydrogen through water electrolysis and back to electric...