Alternative Fuels
Mostrando 1-12 de 99 artigos, teses e dissertações.
-
1. Preparation of Fluorescent Carbon-Based Dots from Waste Tire Pyrolysis
The pyrolysis of waste tire has been proposed as an alternative route to its recycling producing residual oils that can be used as fuels. In this work, a physicochemical process to obtain carbon-based dots (CBD) from carbon black (CBL) derivatives of tires is described. For this, the CBL was treated with different acids to produce CBL1 and CBL2 particles sus
J. Braz. Chem. Soc.. Publicado em: 2020-11
-
2. Pyrolysis of the Caupi Bean Pod (Vigna unguiculata): Characterization of Biomass and Bio-Oil
The use of agricultural residues for the production of bio-oil is an important alternative to the use of fossil fuels. In this study, the Caupi bean pod (Vigna unguiculata) was characterized and used as biomass in the production of bio-oil. This biomass was evaluated in terms of physicochemical, morphological (scanning electron microscopy (SEM)), and thermal
J. Braz. Chem. Soc.. Publicado em: 2020-06
-
3. Determination of Methanol in Gasoline and Ethanol Fuels by High-Performance Liquid Chromatography
Gasoline and ethanol fuels have been adulterated with methanol in Brazil. Methanol is not permitted in concentrations greater than 0.5 vol% due its toxicity but its lower price stimulates the adulteration. A new approach for quantitative analysis of methanol in gasoline and ethanol fuels is reported employing high-performance liquid chromatography coupled wi
J. Braz. Chem. Soc.. Publicado em: 2020-05
-
4. An Overview of the Photocatalytic H2 Evolution by Semiconductor-Based Materials for Nonspecialists
The solar-to-chemical energy conversion is promising to tackle sustainability challenges toward a global future. The production of H2 from sunlight represents an attractive alternative to the use of carboniferous fossil fuels to meet our energy demands. In this context, the water splitting reaction photocatalyzed by semiconductors that can be excited under v
J. Braz. Chem. Soc.. Publicado em: 2020-02
-
5. SEPARATION OF SULFUR-CONTAINING COMPOUNDS FROM DIESEL BY OXIDATION FOLLOWED BY SOLVENT EXTRACTION IN A SINGLE DROP COLUMN
Abstract Oxidative desulfurization (ODS) is an attractive complementary or alternative process for the hydrodesulfurization (HDS) process due to advantages such as mild operating conditions. In the ODS process, the sulfur-containing compounds are oxidized first to polar sulfoxide and sulfone products and then these polar compounds are separated using solvent
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
-
6. Contribuição dos Sistemas Fotovoltaicos Conectados à Rede Elétrica para a Redução de CO2 no Estado do Ceará
Resumo A questão energética tem um significado relevante no contexto da busca do desenvolvimento sustentável, sendo condição essencial para encontrar caminhos alternativos para substituir o uso de combustíveis fósseis. O estado do Ceará possui potencial para o uso de energias renováveis, especialmente a eólica e solar. Este artigo tem como objetivo
Rev. bras. meteorol.. Publicado em: 21/10/2019
-
7. GEOGRAPHIC MODELLING OF WIND AND SOLAR ENERGY POTENTIAL
Abstract Reducing ‘Greenhouse Gas’ emissions, particularly of CO2, is a global commitment which has gained predominance with the emergence of sources that generate renewable energy as an alternative to traditional energy produced through fossil fuels. Renewable or ‘soft’ forms of energy are all those which use the elements of nature - for example, th
Bol. Ciênc. Geod.. Publicado em: 14/10/2019
-
8. Análise da geração de energia elétrica por meio da utilização de conversores do tipo TEG em lingotamento contínuo de aços
RESUMO A fabricação do aço é um processo que requer enormes quantidades de recursos, como por exemplo combustíveis, minério de ferro, carvão, entre outros. Com a crescente preocupação com o meio ambiente, seja pelas cargas ambientais ou pelo aquecimento global, cresce também a necessidade do desenvolvimento de novas tecnologias que possibilitem um
Matéria (Rio J.). Publicado em: 16/09/2019
-
9. Economic and Environmental Analysis of Pellets’ Production in Rio Pardo Watershed, Brazil
ABSTRACT Economic and environmental aspects of residues energetic use in Brazil are extremelly important. In one hand, the country is today a recognized bioenergy producer in a global scenario; on the other, it is still struggling to provide a reliable renewable energy supply to rural communities. Local demand could be supplied through small investments usin
Floresta Ambient.. Publicado em: 22/08/2019
-
10. Evaluation of Rice Bran as a Supplement for Production of Bioethanol by Saccharomyces cerevisiae
ABSTRACT There is an increase in researches to create alternative fuels through the use of biomass and agroindustrial lignocellulosic residues. The present study proposes the use of rice bran as source of energy with the potential to enhance bioethanol production. Using different concentrations of cells (1-5 g.L–1) and rice bran (2.5-7.5 g.L –1) with Sa
Floresta Ambient.. Publicado em: 25/03/2019
-
11. Appliance of a high pressure semi-batch reactor: supercritical transesterification of soybean oil using methanol
Abstract This work presents the results of a supercritical transesterification process of soybean oil using methanol, performed in a laboratory high pressure semi-batch reactor. A full description of the equipment and a standard operating procedure are also provided. Since fossil fuels are not renewable, biofuels such biodiesel, have gained attention over t
Food Sci. Technol. Publicado em: 31/01/2019
-
12. Application of Full Factorial Design to Evaluate the Effect of Different Variables on the Stability of Biodiesel:Diesel Blends under Storage Conditions
Biodiesel is obtained from a renewable source and has been used as an alternative to fossil fuels. It has unsaturated fatty acid methyl esters that can degrade due to oxidation of the double bonds. The instability of biodiesel during storage may cause problems regarding the maintenance and operation of motors. This work evaluated the effect of several variab
J. Braz. Chem. Soc.. Publicado em: 2017-10