Paraffins
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Study of the Effect of Inhibitors Solutions on the Chemical Composition of Waxes by Rheology Tests and High Resolution Mass Spectrometry
Wax deposit is of a great concern in the petroleum industry and causes partial or total blockage of the pipelines. In this work, four Brazilian crude oils (P1-P4) and five inhibitors solutions (I1-I5) were used associating rheology results to understand, at a molecular level, the characteristics of the saturated fractions by high-resolution mass spectrometry
J. Braz. Chem. Soc.. Publicado em: 2020-04
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2. LIGHT N-PARAFFINS SEPARATION BY INVERSE GAS CHROMATOGRAPHY WITH CUBAN VOLCANIC GLASS
ABSTRACT In this work the applicability of a natural volcanic glass (technological type I material) from Cuba is investigated as adsorbent for separation of mixtures of C1-(C5; C6; C7; C8; C9) hydrocarbons by inverse gas chromatography under flow conditions in a temperature range of 328-343 K. The experimental results indicated that the material was mainly
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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3. SÍNTESE E CARACTERIZAÇÃO DE SURFACTANTES ALQUILFENIL POLIGLICOSÍDICOS A PARTIR DA AMILOSE E ALQUIL FENÓIS EXTRAÍDOS DO LCC NATURAL
The surfactants were synthesized by condensing the obtained oligosaccharides of amylose and alkyl phenols extracted from the natural cashew nut shell liquid (nCNSL). The Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Spectroscopy (FTIR) data showed aromatic ring bands, glycosidic rings, olefins and paraffins. The Nuclear Overhauser Effect Sp
Quím. Nova. Publicado em: 2016-08
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4. USE OF A LOW-COST TEMPLATE-FREE ZSM-5 FOR ATMOSPHERIC PETROLEUM RESIDUE PYROLYSIS
To understand the physicochemical properties and catalytic activity during the pyrolysis of atmospheric petroleum residue, a template-free ZSM-5 zeolite was synthesized using a direct method without additional seeds or an organic structure director and compared with conventionally synthesized ZSM-5. The crystallinities of the two zeolites were evaluated by X
Quím. Nova. Publicado em: 2016-04
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5. Upgrade of Biofuels Obtained from Waste Fish Oil Pyrolysis by Reactive Distillation
Bio-oil is classified as second-generation biofuel and it is produced mainly through the pyrolysis of a waste lignocellulosic biomass base. The application of this product is still very limited, due to some of its chemical characteristics. This paper presents a proposal for the reduction of the acidity of bio-oil obtained from waste fish oil, previously prod
J. Braz. Chem. Soc.. Publicado em: 2015-02
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6. Síntese e caracterização de catalisadores VOx/Nb2O5/Al2O3 para a reação de desidrogenação oxidativa de parafinas lineares / Synthesis and characterization of VOx/Nb2O5/Al2O3 catalysts for oxidative dehydrogenation reaction of linear paraffins
The use of niobium oxide as a promoter and as a support has been investigated in various catalyst applications, such as selective oxidation, hydrocarbonate conversion, polymerization, elimination of (NOx) pollutants, dehydrogenation, etc. It is known that adding niobium to γ-Al2O3 improves acidity, selectivity and thermal stability and consequently the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2009
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7. Análise termodinâmica das reformas do metano (oxidativa e autotérmica), do etanol e da nafta
Catalytic reforming of hydrocarbons or other organic species is a technology usually employed in either improving traditional energy sources or producing alternative energy sources. Amongst the technologies employed in improving traditional energy sources, one can include catalytic reforming of petrochemical naphtha. Although being also employed to produce h
Publicado em: 2009
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8. Study of the adsorption of n-paraffin in microporous materials using fixed-bed / Estudo da adsorção de n-parafinas em materiais microporosos utilizando leito fixo
O petróleo do Recôncavo Baiano possui características peculiares devido ao seu alto teor de parafinas. O óleo produzido é processado na Refinaria Landulfo Alves RLAM. O n-dodecano é um precursor na produção do LAB - Linear Alquilbenzeno, que é o principal componente para fabricação de detergentes biodegradáveis. Esta n-parafina é obtida de uma c
Publicado em: 2008
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9. VALUATION OF GTL PROJECT: A REAL OPTION APLICATION WITH MEAN REVERSION MODEL / AVALIAÇÃO ECONÔMICA DO PROJETO GTL: UMA APLICAÇÃO DA TEORIA DE OPÇÕES REAIS COM PROCESSO DE REVERSÃO À MÉDIA
The present work has objective to analyze the investiment of a XTL plant using the Real Options Theory. This methodology is adjusted to evaluate the capacity that this project has to changes its input and/or output, in other words, to elect the option that maximizes payoff, in accordance with each scenario, allowing to evaluate the construction of a plant wi
Publicado em: 2007
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10. DEVELOPMENT OF AN IN SITU THERMAL DESORPTION SYSTEM FOR THE REMEDIATION OF CONTAMINATED SITES / DESENVOLVIMENTO DE UM SISTEMA DE DESSORÇÃO TÉRMICA IN SITU PARA REMEDIAÇÃO DE ÁREAS CONTAMINADAS
This dissertation refers to the development of an in situ system devised to remediate soils contaminated with organic compounds. The system consists basically of a thermal probe capable of heating the soil matrix through radial flow and a thermal oxidizer that treats the resulting gases emissions. The system clearly reached the design aims. The thermal probe
Publicado em: 2005
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11. Estudo experimental do escoamento agua-oleo com precipitação de parafinas em dutos submarinos / Experimental study of the oil-water flow with paraffin precipitation in submarine
A deposição de parafinas em dutos submarinos é um sério problema para a produção marítima de petróleo. Parafinas são substâncias orgânicas caracterizadas por longas cadeias de carbono e hidrogênio, formadas por ligações covalentes simples, apresentando peso molecular elevado, devido ao grande número de átomos de carbono. Parafinas precipitam-
Publicado em: 2005
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12. MODELAGEM TRANSIENTE DA TRANSFERÊNCIA DE CALOR EM DUTOS DE PETRÓLEO OU GÁS, TERMICAMENTE ISOLADOS / TRANSIENT HEAT TRANSFER MODELING OF THERMALLY INSULATED OIL OR GAS PIPELINES
Subsea pipelines are employed not only for production but also for transportation. In both situations, warm oil loses heat to the cold sea water. The heat loss to the ambient is controlled by means of thermal insulation, which is designed for steady state operations. During shutdowns, the stagnant fluid in the pipeline loses heat to the cold surrounding, eve
Publicado em: 2005