Natural Gas Extraction
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Desenvolvimento de método analítico para determinação de resíduos de pesticidas em mel de abelhas Apis Mellifera
Honey, main beekeping product, used as food, sweetneer and to terapic purpose, has the image of being natural, healthy and clean. However, today this product is produced in a poluted environmental by different sources of contamination such as pesticides that diffuse around the world and can reach the population by the comsumption of contaminated food, as hon
Publicado em: 2009
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14. Avaliação de fragrancia em detergente em po por cromatografia gasosa e metodos quimiometricos / Evaluation of fragrance in powder detergent by gas chromatography and chemometrics
Fragrância é uma mistura de moléculas orgânicas como ésteres, cetonas, aldeídos, hidrocarbonetos, alcoóis, entre outras, tendo como fontes substâncias de origem natural ou sintética, que quando combinadas em proporções harmônicas conferem uma característica odorífera ímpar em um perfume ou em um produto perfumado. Considerando essa caracterís
Publicado em: 2009
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15. Estudo da transformação durante o resfriamento continuo e da microestrutura do aço microligado X80 utilizado na construção de tubos para transporte de gás natural e petróleo. / Study of the transformation during the continuous cooling and the microstructure of microalloyed steel X80 used in the building of pipelines for gas and oil transport.
The continuous increase of energy generated from petroleum and natural gas created the need to improve the mechanical properties of microalloyed steels used in gas and oil pipelines, in order to increase their flow with smaller costs and higher reliability. The control of the different phases, morphology of microconstituents like ferrite plus carbide aggrega
Publicado em: 2008
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16. Desenvolvimento e validação de metodologia de análise de bisfenol a em amostras de águas naturais por CG-EM
Bisphenol A (BPA) is widespread used as a monomer in the fabrication of polycarbonate an and epoxide resins. Polycarbonate, in turn, is used in a wide array of plastics products and its release into the environment mainly occurs during manufacturing. The proposed method in this study was applied satisfactorily to the determination and quantification of this
Publicado em: 2008
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17. Matéria orgânica de Latossolos Húmicos: análises térmica e espectroscópica, efeito do uso e correção química / Organic matter of humic Latosol (Oxisol): thermal and spectroscopic analyses, land use and chemical correction
The objective of this study was to contribute to the clarification of several aspects related to the behavior of organic matter (OM) in highly weathered tropical soils. Six samples of humic A horizon Latosol were collected from three sites in Minas Gerais: i) Sericita, (under coffee crop, pasture, ferns and Atlantic Forest fragment); ii) Mutum (under Atlanti
Publicado em: 2008
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18. Emissão de mercúrio para a atmosfera pela queima de gás natural no Brasil
Increasing natural gas use in Brazil triggered a discussion of its role as a Hg source. We show that Hg emissions to the atmosphere from fossil fuel combustion for power generation in Brazil contribute with 6.2% (4.2 t yr-1) to the total anthropogenic Hg atmospheric emissions, with coal combustion and biomass burning as major sources. Natural gas contributes
Química Nova. Publicado em: 2007-04
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19. Study About the Potentiality of the Extraction of Natural Products Using Supercritical CO2. / Estudo da Potencialidade da Extração de Produtos Naturais utilizando CO2 Supercrítico.
This study presents a work about different industrial segments that can use extraction with supercritical fluid as one of its stages in this process. Researches were carried out in the pharmaceutical and food development areas so as to evaluate its operation potential, carrying out extractions of substances out of a matrix as, for example, obtaining essentia
Publicado em: 2007
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20. Inventário do ciclo de vida do metanol para as condições brasileiras. / Life cycle inventory of methanol for brazilian conditions.
Life Cycle Assessment is a tool for environmental management which allows for the assessment of potential impacts and other environmental aspects associated to a product. This is done through the analysis of several steps since the extraction of raw materials from nature which go into the productive system (cradle) to the disposal of the final product in the
Publicado em: 2007
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21. O trabalho em produção contínua: uma abordagem ergonômica na indústria do petróleo. / The work in continuous production: an ergonomic approach at the oil industry.
This work presents the ergonomics study based on offshore oil production platforms, in operation works for the process plant. The first investigations resulted on indications of disintegrated and unbalanced operational aspects into the production environment. From those evidences, the bibliographical revision indicated the considerations and limits of aspect
Publicado em: 2006
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22. Recuperação dos componentes do aroma de café por pervaporação / Recovery of coffee aroma compounds by pervaporation process
At present, Brazil is the first world coffee producer sharing 30% of the international producer market and occupies second rank of the consumer market. Pervaporation is a membrane separation process where liquid mixtures are fractionated due to partial vaporization of its components through a dense selective membrane. Pervaporation is more advantageous than
Publicado em: 2006
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23. Desenvolvimento de uma metodologia analítica com microextração líquido-líquido para determinação de agroquímicos organofosforados em água
Many organic agro-chemicals residues are presented in low concentrations waters. Due to this, has been increasing the interest on the development of sample preparation techniques that give the possibility of analits pre concentration present in the matrix to adjust in the detection system. In this work, was used analytical method, the liquid-liquid microextr
Publicado em: 2006
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24. Influência da calcinação sobre a remoção de ferro da caulinita e ilita e seus efeitos sobre a acidez
Samples of natural clay composed by kaolinite, illite, goethite and quartz, were calcinated and submitted to lixiviation with citrate and chloridric acid in order to remove iron. Investigation due to extraction consequences was carried cut by analyzing its acid properties using ammonia gas as probe in infrared spectrophotometry analysis. The sample that were
Química Nova. Publicado em: 2003-03