Navegação Ciências Exatas e da Terra por Autor "Cataluña Veses, Renato"
Resultados 1-18 de 18
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Amostragem do material particulado e fração orgânica volátil das emissões em motor ciclo diesel sem a utilização de túnel de diluição
Menezes, Eliana Weber de; Cataluña Veses, Renato (2008) [Artigo de periódico]Using a sampling method of particulate matter (PM) without the use of a dilution tunnel allows for evaluations of the volatile hydrocarbons (HC) in the emissions of diesel cycle engines. The procedure in this work applied ... -
Application of carbon composite adsorbents prepared from coffee waste and clay for the removal of reactive dyes from aqueous solutions
Santos, Davis Castro dos; Adebayo, Matthew Ayorinde; Lima, Éder Cláudio; Pereira, Simone de Fátima Pinheiro; Cataluña Veses, Renato; Saucier, Caroline; Thue, Pascal Silas; Machado, Fernando Machado (2015) [Artigo de periódico]A novel carbon composite was prepared from a mixture of coffee waste and clay with inorganic:organic ratio of 1.3 (CC-1.3). The mixture was pyrolysed at 700 °C. Considering the application of this adsorbent for removal of ... -
Bio-oil production by thermal cracking in the presence of hydrogen
Cataluña Veses, Renato; Shah, Zeban; Kuamoto, Pedro Motifumi; Caramão, Elina Bastos; Machado, Maria Elisabete; Silva, Rosângela da (2016) [Artigo de periódico]This paper describes the bio-oil production process of a mixture of agricultural wastes: discarded soybean frying oil, coffee and sawdust, by pyrolysis and thermal cracking in the presence of hydrogen. The fractions obtained ... -
Bio-oil production from pyrolysis of coffee and eucalyptus sawdust in the presence of 5% hydrogen
Shah, Zeban; Cataluña Veses, Renato; Aguilhera, Rafaela Antunes; Silva, Rosângela da (2016) [Artigo de periódico]In this paper, we have done some important analysis of bio-oil obtained from the pyrolysis of coffee and eucalyptus sawdust in the presence of 5% Hydrogen. The bio-oil was obtained in one step pyrolysis in which temperature ... -
Caracterizacão de catalisadores Cu/CeO2/Al2O3 por redução a temperatura programada e atividade para oxidação de CO
Cataluña Veses, Renato; Baibich, Ione Maluf; Dallago, Rogério Marcos; Piccinini, Carlos Alberto; Martinez-A, A.; Soria, J. (2001) [Artigo de periódico]The kinetic parameters for the CO oxidation reaction using copper/alumina-modified ceria as catalysts were determined. The catalysts with different concentrations of the metals were prepared using impregnation methods. In ... -
Carbon oxidation generated in diesel engines using iron-doped fuel
Schulz, Gracélie Aparecida Serpa; Tamborim Takeuchi, Silvia Margonei Mesquita; Silva, Gabriel Cardoso Oliveira da; Santos, Talita Portes dos; Lissner, Elízeo Angel; Cataluña Veses, Renato (2012) [Artigo de periódico]The soot oxidation activity of metallic iron nanoparticles was studied under real diesel engine conditions. Particulate matter (PM) was sampled at distinct temperatures, using fuels containing ferrocene. The results indicated ... -
Combustion time of the oxygenated and non-oxygenated fuels in an Otto cycle engine
Mello, Pedro Barbosa; Wildner, Fabiano Disconzi; Andrade, Giovanni Souza de; Cataluña Veses, Renato; Silva, Rosângela da (2014) [Artigo de periódico]Speed flame propagation in Otto cycle engines is one of the principal characteristics of fuel and is fundamental in defining the ignition advance. The greater the propagation speed the less the negative work required to ... -
A comparative study and analysis of two types of bio-oil samples obtained from freshwater algae and microbial treated algae
Shah, Zeban; Cataluña Veses, Renato; Silva, Rosângela da (2016) [Artigo de periódico]Pyrolysis experiments of two types of algal biomass (Spirogyra) freshwater Algae (FWA) and microbial treated algae (MTA) were carried out in an electrically heated stainless steel reactor to determine the effects of pyrolysis ... -
Conformação de monolitos cerâmicos de cordierita via eletroforese
Piccinini, Carlos Alberto; Bergmann, Carlos Perez; Marques, Caio Marcelo; Cataluña Veses, Renato (1999) [Artigo de periódico]A técnica de conformação eletroforética é apresentada como uma alternativa viável para a produção de monolitos cerâmicos de cordierita. A matriz utilizada para a conformação das estruturas cerâmicas contém 109 condutos em ... -
Decomposição catalítica de óxidos de nitrogênio
Cónsul, Julia Maria Diaz; Thiele, Daniel; Cataluña Veses, Renato; Baibich, Ione Maluf (2004) [Artigo de periódico]Contaminant gases in the atmosphere constitute an important problem to be solved in the world. The NOx gases produced as a consequence of engine high temperatures are deleterious to environment and human health, as they ... -
Desenvolvimento de um equipamento para avaliação do efeito do etanol na pressão de vapor e entalpia de vaporização em gasolinas automotivas
Cataluña Veses, Renato; Silva, Rosângela da (2006) [Artigo de periódico]The quality of the gasoline utilized for fueling internal combustion engines with spark ignition is directly affected by the gasoline’s properties. Thus, the fuel’s properties must be in perfect equilibrium to allow the ... -
GC-MS and FTIR analysis of bio-oil obtained from freshwater algae (spirogyra) collected from freshwater
Shah, Zeban; Cataluña Veses, Renato; Inamullah; Silva, Rosângela da (2016) [Artigo de periódico]Algae are gaining broad consideration as a substitute renewable source of biomass for the manufacture of bioethanol, due to this reason categorized under the “third generation biofuels” .İn this work, GC-MS analysis and ... -
Obtenção do 2-etóxi-2-metilpropano grau analítico a partir do produto comercial
Venturi, Vanessa; Cataluña Veses, Renato (2010) [Artigo de periódico]Ethyl tert-butyl ether (ETBE) is produced by commercial processes to a purity of up to 96%. In recent years, several companies have started to produce ETBE, increasing the demand for standards with higher grades of purity ... -
Rendimento térmico e emissões de contaminantes atmosféricos de gasolinas formuladas com etanol, MTBE e TAEE
Silva, Rosângela da; Menezes, Eliana Weber de; Cataluña Veses, Renato (2008) [Artigo de periódico]The specific consumption and carbon monoxide (CO) and nitrogen oxide (NO) emissions from gasolines formulated with ethanol, methyl tert-butyl ether (MTBE) and tert-amyl ethyl ether (TAEE) were evaluated in the rich, ... -
Selective reduction of NOx by propylene over silver catalyst under oxidative conditions
Cónsul, Julia Maria Diaz; Thiele, Daniel; Baibich, Ione Maluf; Cataluña Veses, Renato (2004) [Artigo de periódico]Neste trabalho foram estudados catalisadores Ag/Al2O3 e Ag/Al2O3/Corderita, preparados por um método de impregnação convencional, na reação de redução de NO utilizando propeno como agente redutor. Os catalisadores foram ... -
Separation of phenol from bio-oil produced from pyrolysis of agricultural wastes
Shah, Zeban; Cataluña Veses, Renato; Ceschi, Marco Antonio; Silva, Rosângela da (2017) [Artigo de periódico]The aim of this study was to separate phenol from Bio-Oil obtained from the pyrolysis of agricultural wastes (BAW). The BAW was obtained in one step catalytic pyrolysis in which temperature of the reactor was kept at 30°C ... -
Thermal conductivity of gas by pulse injection techniques using specific thermal conductivity detector (TCD)
Cataluña Veses, Renato; Silva, Rosângela da; Menezes, Eliana Weber de; Samios, Dimitrios (2004) [Artigo de periódico]Este artigo apresenta um procedimento para determinar a condutividade térmica de gases através de injeção por pulso, utilizando um detector de condutividade térmica (TCD). As medidas foram efetuadas à 323K e pressão ... -
Using GC-MS to analyze bio-oil produced from pyrolysis of agricultural wastes : discarded soybean frying oil, coffee and eucalyptus sawdust in the presence of 5% hydrogen and argon
Shah, Zeban; Cataluña Veses, Renato; Silva, Rosângela da (2016) [Artigo de periódico]Pyrolysis is a thermal process for converting various biomasses, wastes and residues to produce high-energydensity fuels (bio-oil). In this paper, we have done some important analysis of bio-oil which is obtained from the ...