Dibenzothiophene
Mostrando 1-12 de 50 artigos, teses e dissertações.
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1. SYNTHESIS OF MORPHOLINE-BASED IONIC LIQUIDS FOR EXTRACTIVE DESULFURIZATION OF DIESEL FUEL
Abstract Extractive desulfurization with ionic liquids has attracted significant attention from a growing number of scientists due to the current environmental restrictions on fuel. Protic ionic liquids (PILs) were synthesized via equimolar neutralization of morpholine and formic-based compounds. The obtained PILs were characterized by Fourier transform infr
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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2. Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene
Textural and catalytic properties of nickel, palladium or titanium oxides supported on MCM-41 materials were evaluated in this paper. The results indicated that the MCM-41 material with well defined and highly ordered hexagonal structure was obtained. After metal ions impregnation and calcinations, the structure of MCM-41 was preserved and formed metallic ox
Mat. Res.. Publicado em: 27/09/2013
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3. Degradation of Benzo [a] Pyrene by a novel strain Bacillus subtilis BMT4i (MTCC 9447)
Benzo [a] Pyrene (BaP) is a highly recalcitrant, polycyclic aromatic hydrocarbon (PAH) with high genotoxicity and carcinogenicity. It is formed and released into the environment due to incomplete combustion of fossil fuel and various anthropogenic activities including cigarette smoke and automobile exhausts. The aim of present study is to isolate bacteria wh
Brazilian Journal of Microbiology. Publicado em: 2009-12
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4. Estudo de adsorção de compostos sulfurados utilizando um diesel comercial dopado com benzotiofeno e dibenzotiofeno
Desulphurization process by adsorption was studied employing a commercial diesel dooped with 1000 mg/L of benzothiophene and dibenzothiophene. The adsorbents materials employed were three types of activated alumina (acid, basic and neutral). For comparison, adsorption process was made also using oxidized diesel sample. The results showed that the adsorbents
Química Nova. Publicado em: 2009
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5. Estudo termodinamico do equilibrio liquido-liquido visando a remoção do enxofre do oleo diesel com liquidos ionicos / Thermodynamic study of liquid-liquid equilibrium aiming sulfur removal by using ionic liquids
The sulfur contaminants more difficult to remove from diesel oil by hydrodesulfuration process (HDS) are the sterically hindered aromatic compounds, like dibenzothiophene (DBT), and its alkylated derivatives 4-methyl-dibenzothiophene (4-MDBT) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT), commonly called DBTs. Increasing the number of methyl groups attached
Publicado em: 2009
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6. Estudo da adsorção de compostos sulfurados empregando zeólitas contendo zinco
This paper deals with an adosrption of sulphur compounds employing zeolites containing zinc. The zeolites employed were commercial NaY and Beta. The zinc was incorporated in three levels: 0.5; 1.0 and 5%. The sulphur compounds studied were benzothiophene and dibenzothiofene. The results showed that both zeolites can be employed for adsorption of benzothiophe
Química Nova. Publicado em: 2009
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7. DETECÇÃO DE ESPÉCIES BACTERIANAS ENVOLVIDAS EM PROCESSOS DE BIODESSULFURIZAÇÃO EM UM SISTEMA DE LANDFARMING, NA REFINARIA GABRIEL PASSOS (REGAP), MINAS GERAIS.
The emission of sulfur from the burning of fossil fuels represents a global problem because it is the major cause of acid rain and air pollution. A major concern of the refineries is reducing the sulfur content of oil. The technology commonly used for this purpose is the hydrodesulfurization. An alternative that is being increasingly considered is biodesulfu
Publicado em: 2009
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8. Metabolismo do dibenzotiofeno por Cunninghamella elegans associados aos estudos morfolÃgicos e ultraestruturais
Considering the biotechnological potential of Cunninghamella elegans related to recalcitrant compounds in the environment the aim of this work was to evaluate the dibenzothiophene (DBT) degradation in association with morphological and ultrastructral aspects. Samples treated with DBT were submitted to gas chromatography coupled to mass spectrometry - GC-MS.
Publicado em: 2008
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9. Pseudomonas fluorescens UCP 1514 biotechnological potential in degradation of dibenzotiofenol / Potencial biotecnologico de Pseudomonas fluorescens UCP 1514 no no processo degrativo do dibenzotiofeno
Crude oil and its distillates contain significant amounts of low-molecular-mass organosulphur compounds such as alkyland cycloalkyl thiols, alkyl- and arylthioethers and aromatic heterocycles based on thiophene. This last group of polycyclic aromatic sulfurated hydrocarbons includes thiophene itself, benzothiophene, dibenzothiophene, and their alkylated deri
Publicado em: 2007
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10. DessulfurizaÃÃo oxidativa da mistura dibenzotiofeno-isoctano
A preocupaÃÃo com a emissÃo de poluentes no meio ambiente està provocando o surgimento de leis mais rÃgidas, que restringem o teor de enxofre na gasolina e no diesel. As indÃstrias de petrÃleo tÃm investido em novas tecnologias de remoÃÃo de enxofre com o intuito de diminuir os gastos e, principalmente, de melhorar o rendimento para atender Ãs nov
Publicado em: 2007
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11. ROOMTEMPERATURE PHOSPHORIMETRY BASED ON DETERGENTLESS MICROEMULSIONS: METHOD DEVELOPMENT AND APPLICATION AIMING THE DETERMINATION OF CARBAZOLE AND DIBENZOTHIOPHENE IN ORGANIC LIQUID SAMPLES / FOSFORIMETRIA NA TEMPERATURA AMBIENTE COM USO DE MICROEMULSÕES SEM DETERGENTE: DESENVOLVIMENTO DE MÉTODO E APLICAÇÃO NA DETERMINAÇÃO DE CARBAZOL E DIBENZOTIOFENO EM AMOSTRAS ORGÂNICAS LÍQUIDAS
Um estudo foi realizado visando avaliar nova abordagem analítica para a determinação de um hidrocarboneto poliaromático nitrogenado (carbazol, CBZ) e um sulfurado (dibenzotiofeno, DBT) em amostras orgânicas líquidas usando fosforimetria na temperatura ambiente. Para isto, microemulsões sem detergente foram usadas para viabilizar a determinação deste
Publicado em: 2006
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12. Mineralization of the dibenzothiophene biodegradation products 3-hydroxy-2-formyl benzothiophene and dibenzothiophene sulfone.
Dibenzothiophene is degraded to 3-hydroxy-2-formyl benzothiophene by various bacteria, including a strain of Pseudomonas putida that also forms dibenzothiophene sulfone via an alternate pathway. By using these end products as substrates, mixed enrichment cultures that could degrade 3-hydroxy-2-formyl benzothiophene and dibenzothiophene sulfone with the forma