Hydrocarbons Conversion
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. CONVERSION OF SPENT FAT OIL INTO LIQUID AND GASEOUS FUELS THROUGH CLINKER CATALYZED PYROLYSIS
Abstract Repeated heating of fat oil may result in the formation of highly toxic aldehyde compounds. The oils having such compounds are considered as health hazards and therefore their repeated use is banned in many countries. Since huge quantities of the used oil need urgent disposal, this work is focused on the disposal of used oil for the resource recover
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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2. Biodiesel Glycerides from the Soybean Ethylic Route Incomplete Conversion on the Diesel Engines Combustion Process
An evaluation was made to determine the effect of the glycerides presence resulting from the incomplete conversion of soybean biodiesel produced via alkaline catalysis and ethylic route on engine performance, and emissions in formulations containing 10 and 20% (m/m) of biodiesel used as additives in base diesel with low sulfur content and cetane ratings of 4
J. Braz. Chem. Soc.. Publicado em: 2017-12
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3. Iridium Catalysts for C-C and C-O Hydrogenolysis: Catalytic Consequences of Iridium Sites
The support effect on the properties of iridium catalysts for C-C and C-O hydrogenolysis was investigated. Cyclohexane conversion and glycerol hydrogenolysis were used to compare the behavior of iridium catalysts in terms of C-C and C-O cleavage. The nature of the support influenced the catalyst performance in both cyclohexane conversion and glycerol hydroge
J. Braz. Chem. Soc.. Publicado em: 2016-05
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4. Optimization of Reaction Conditions for Cyclohexane to Cyclohexanone with t-Butylhydroperoxide Over CuCl2 Loaded with Activated Carbon
Catalytic oxidation of hydrocarbons can be performed efficiently in the presence of tert- butylhydroperoxide (TBHP) under a low-valent transition metal as the catalyst. CuCl2 loaded with activated carbon had synthesized and characterized by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDX), and then utilized as a catalyst for the oxidati
J. Braz. Chem. Soc.. Publicado em: 2016-01
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5. Synthesis of SAPO-34/ZSM-5 Composite and Its Catalytic Performance in the Conversion of Methanol to Hydrocarbons
SAPO-34/ZSM-5 composite was synthesized with nano-sized ZSM-5 zeolite as seeds and characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen sorption, Fourier transform infrared (FTIR) and temperature-programmed desorption of ammonia (NH3-TPD); its catalytic performance in the conversion of methanol to hydrocarbons (MTH) w
J. Braz. Chem. Soc.. Publicado em: 2015-02
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6. Bioconversion of R-(+)-limonene to perillic acid by the yeast Yarrowia lipolytica
Perillyl derivatives are increasingly important due to their flavouring and antimicrobial properties as well as their potential as anticancer agents. These terpenoid species, which are present in limited amounts in plants, may be obtained via bioconversion of selected monoterpene hydrocarbons. In this study, seventeen yeast strains were screened for their ab
Braz. J. Microbiol.. Publicado em: 04/02/2014
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7. Química e sustentabilidade: novas fronteiras em biocombustíveis
This contribution discusses the state of the art and the challenges in producing biofuels, as well as the need to develop chemical conversion processes of CO2 in Brazil. Biofuels are sustainable alternatives to fossil fuels for providing energy, whilst minimizing the effects of CO2 emissions into the atmosphere. Ethanol from fermentation of simple sugars and
Quím. Nova. Publicado em: 2013
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8. 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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9. Productions of ethyl esters (biodesel) from the transesterification core residual oil / Produção de esteres etilicos (biodiesel) a partir da transesterização basica de oleo residual
Biodiesel (alkyl esters) is a clean burning fuel derived from a renewable lipid feedstock such as vegetable oil or animal fat. It is biodegradable, non-inflammable, nontoxic and produce much lesser COx, sulfur dioxide and unburned hydrocarbons than petroleum-based diesel. Nowadays, due to the price of virgin oil such as soybean and canola oils, the use of lo
Publicado em: 2008
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10. ProduÃÃo de gÃs de sÃntese por tri-reforma do metano em reator de leito fixo
The ever increasing availability of natural gas (NG), and the abundant carbonic gas production, via fermentation of most prepared from sugar cane products (sugar cane juice, and molasses), thermoelectric generators, and refineries have enhanced the research interest of these commodities. The indirect NG conversion processes to synthesis gas (CO and H2), the
Publicado em: 2007
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11. Effects of operating conditions on compositional characteristics and reaction kinetics of liquid derived by delayed coking of nigerian petroleum residue
The thermal upgrading of Nigerian petroleum residue was studied at relatively low pressure in a delayed coking reactor system. In this work, the intent was to investigate the effects of process variables such as reaction temperature (200(0)C to 600(0)C), reaction time (0 to 120min), additive concentration loading and additive-to-residue ratio on the amounts
Brazilian Journal of Chemical Engineering. Publicado em: 2006-09
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12. Production of aromas and fragrances through microbial oxidation of monoterpenes
Aromas and fragrances can be obtained through the microbial oxidation of monoterpenes. Many microorganisms can be used to carry out extremely specific conversions using substrates of low commercial value. However, for many species, these substrates are highly toxic, consequently inhibiting their metabolism. In this work, the conversion ability of Aspergillus
Brazilian Journal of Chemical Engineering. Publicado em: 2006-09