Results 1 to 10 of about 860 (74)
Synthesis of MeOH and DME From CO2 Hydrogenation Over Commercial and Modified Catalysts [PDF]
Frontiers in Chemistry, 2022 Growing concern about climate change has been driving the search for solutions to mitigate greenhouse gas emissions. In this context, carbon capture and utilization (CCU) technologies have been proposed and developed as a way of giving CO2 a sustainable ...
Rafaelle G. Santiago +7 more
doaj +2 more sources
Assessing CO2 Adsorption on Amino-Functionalized Mesocellular Foams Synthesized at Different Aging Temperatures [PDF]
Frontiers in Chemistry, 2020 A wide variety of solid sorbents has recently been synthesized for application in CO2 adsorption. Among them, mesoporous silicas deserve attention because of their ability to accommodate large concentrations of different chemicals as a consequence of ...
Enrique Vilarrasa-García +4 more
doaj +2 more sources
Lubricants, 2023 In this study, the thermo-oxidative stability and tribological behavior of bio-based lubricant samples synthesized from castor oil using isoamyl alcohol were evaluated.
Maria Marliete F. Melo Neta +7 more
doaj +1 more source
Lubricants, 2023 The depletion of oil reserves and concerns about the environmental impact of the use and incorrect disposal of mineral lubricants have been promoting the development of bio-based lubricants.
Paulo Roberto Campos Flexa Ribeiro Filho +5 more
doaj +1 more source
AppliedChem, 2023 In this study, a purification route was applied to crude glycerol and its valorization via etherification was evaluated. Crude glycerol samples were obtained through transesterification reactions of soybean oil with methanol using potassium hydroxide as ...
Silvia S. O. Silva +4 more
doaj +1 more source
Boletim do Observatório Ambiental Alberto Ribeiro Lamego, 2022 O biocarvão ativado é um adsorvente que pode ser usado para a remoção de poluentes em meio aquoso através da técnica de adsorção. O trabalho tem como objetivo é avaliar a interferência do encapsulamento com alginato de sódio de biocarvão ativado ...
Izabelle Nathália Godinho Barbosa de Oliveira +4 more
doaj +1 more source
Efeito do ph e do tempo de contato na adsorção de corantes reativos por microesferas de quitosana [PDF]
Polímeros, 1999 RESUMO: Microesferas de quitosana com grau de reticulação de 24% foram empregadas para adsorção dos corantes reativos Azul 2, Preto 5 e Laranja 16. A adsorção dos corantes reativos foi avaliada em função da acidez da solução e do tempo de contato com o ...
Irene Y. Kimura +4 more
doaj +1 more source
Journal of Chemistry, Volume 2019, Issue 1, 2019., 2019 As increasing environmental policies constrains are imposed, the demand for biodegradable products also increases. Although vegetable oils present some properties that favor its use for formulation of a bio‐based lubricant, its poor resistance to oxidation hinders its application as such.
F. Murilo T. Luna +7 more
wiley +1 more source
HIDROGENEOFTALATO DE POTÁSSIO COMO MOLÉCULA MODELO PARA ESTUDOS DE ADSORÇÃO SOBRE TiO2
Eclética Química, 2018 Este trabalho teve por objetivo utilizar o hidrogenoftalato de potássio como molécula modelo para estudos de adsorção em TiO2. Os resultados de adsorção do hidrogeneoftalato sobre TiO2 se ajustaram aos modelos de adsorção propostos por Langmuir e ...
José Pedro Serra VALENTE +3 more
doaj +1 more source
Journal of Chemistry, Volume 2017, Issue 1, 2017., 2017 The CaO solid derived from natural quail eggshell was calcined and employed as catalyst to produce biodiesel via transesterification of sunflower oil. The natural quail eggshell was calcined at 900°C for 3 h, in order to modify the calcium carbonate present in its structure in CaO, the activity phase of the catalyst.
Leandro Marques Correia +5 more
wiley +1 more source