Methane Flux
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Organic matter composition related to methane ebullitive flux of an urban coastal lagoon, Southeastern Brazil
In 2016, Brazil emitted 18.25 Tg of methane. Some of these emissions occur through continental aquatic ecosystems, locations of fate and accumulation of organic and inorganic matter. Thus, the aim of this study is to evaluate the origin of organic matter in Rodrigo de Freitas Lagoon, an eutrophic, coastal and chocked lagoon in Rio de Janeiro, Brazil, through
Quím. Nova. Publicado em: 15/08/2019
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2. AnÃlise do Fluxo de Gases na Camada de Cobertura do Aterro SanitÃrio Municipal Oeste de Caucaia (ASMOC) / Analysis of gas Flow in covering layer of Municipal Landfill West of Caucaia (ASMOC)
The growing human consumption entails a greater generation of waste, which, in turn, must be properly treated and disposed. The storage of waste in landfills produces gas, which if not managed properly will affect the quality of life. The uncontrolled emissions of these gases cause multiple economic, social and environmental impacts, as due to air pollution
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/01/2012
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3. Modelagem da radiação térmica em chamas laminares da combustão de metano em ar
This work analyses the effects of thermal radiation heat transfer on methane-air laminar diffusion flames. The analysis is based on the solution of the equations of continuity, fluid motion, species mass-fraction and enthalpy. The soot formation is accounted with a twoequation model while a chemistry mecanism with 112 reactions is used for the combustion of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Emissão de metano nas lagoas de decantação da Estação de tratamento de esgotos de Jundiaí / Methane emission from decantation lagoons in Jundiaí wastewater treatment plant
In the present work was estimated the contribution of methane emission to the global atmosphere. In this study were realized two campaigns of collections in the settling ponds n.°03 (2008) and n.°04 (2010) with sampling operation being carried out in points coming into and out of the lagoons. A gas collector has been utilized as the UASB inner gas keeper a
Publicado em: 2010
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5. Estudo da permeação de hidrogênio em reator com membrana de paládio: modelagem matemática e simulação computacional
Hydrogen is the simplest and most common element in the universe. Currently, some industries use hydrogen to refine oil, and to produce ammonia and methanol. Since the combustion of hydrogen produces only water and energy, it is considered to be viable and environmentally safe. Most of the hydrogen produced in industrial scale is by the steam reforming proce
Publicado em: 2009
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6. Simulação numérica da separação de misturas CH4/He e CO2/He em colunas de adsorção em leito fixo
Methane and carbon dioxide gases are part of natural gas composition and methane is in bigger proportion. Both gases are pollutants which methane is the most responsible by the greenhouse effect and carbon dioxide in turn by pipelines oxidation in natural gas transporting. The separation of CO2 from natural gas promotes an increase in calorific power of the
Publicado em: 2009
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7. FLUXO DE GASES DE EFEITO ESTUFA EM SISTEMAS DE PREPARO DO SOLO E ROTAÇÃO DE CULTURAS NO PLANALTO DO RIO GRANDE DO SUL / GREENHOUSE GASES FLUX IN SYSTEMS OF SOIL TILLAGE AND CROP ROTATION IN THE PLANALTO REGION OF RIO GRANDE DO SUL
The main greenhouse gases (GHG) are the nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2), whose atmosphere concentrations increased in an unprecedented rate since the Industrial Revolution. This work aim evaluates the GEE emissions of spring/summer season in different soil management systems located in the Planalto region of Rio Grande do Sul Stat
Publicado em: 2009
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8. Measurements of gas emissions at eight solid waste landfills of the state of São Paulo - Brazil / Medidas da emissão de gases em oito aterros de resíduos sólidos urbanos do Estado de São Paulo - Brasil
Urban solid waste disposal landfills are equipments that must be integrated with the drainage and protection of the public health of municipalities system. Regardless of whether they are well planned, built and operated, they offer environmental impacts to the areas where they are deployed and their surroundings. The present work aimed at measuring, as estim
Publicado em: 2009
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9. Implementação computacional do modelo carga-fluxo de carga-fluxo de dipolo para cálculo e interpretação das intensidades do espectro infravermelho
The first computational implementation that automates the procedures involved in the calculation of infrared intensities using the charge-charge flux-dipole flux model is presented. The atomic charges and dipoles from the Quantum Theory of Atoms in Molecules (QTAIM) model was programmed for Morphy98, Gaussian98 and Gaussian03 programs outputs, but for the Ch
Química Nova. Publicado em: 2008
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10. Study of methane emission on Pantanal of Matogrosso do Sul / Estudo da emissão de metano no Pantanal Sul Matogrossense
The results of an evaluation of the tropical wetland regions contribution to the methane burden are presented. In this study, a total of eight campaigns were performed during the years of 2004 and 2005 inside the Pantanal region of Matogrosso do Sul State in seven sites, near the Miranda River. Static chamber technique with polyurethane syringe sampling was
Publicado em: 2007
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11. Aspectos do comportamento de gás metano dissolvido na água de reservatórios brasileiros / Aspects of dissolved methane behavior in water bodies of brazilian reservoirs
Extended water bodies such as the hydroelectric reservoirs here studied can be greenhouse gas sources ( CH IND.4 and CO IND.2 ) due to decay of part of submerged forest biomass and also due to allochtonous and autochtonous organic compounds. This work presents concentrations, ebullitive and diffusive fluxes of the gases dissolved in the water column in the f
Publicado em: 2004
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12. Imagens EOS-MODIS e LANDSAT 5 TM no estudo da dinâmica das comunidades de macrófitas na várzea amazônica / EOS-MODIS and LANDSAT 5 images for the study of macrophyte community dinamics in the Amazon varzea
Wetlands encompass about 4 to 6% of the terrestrial surface, occurring in all climates, from the tropics to the tundra, in all continents, and exhibit considerable function in the global carbon cycle, being responsible for up to 72% of the global total methane emissions by non-anthropogenic sources. The Amazon river floodplain is one of the most extensive ar
Publicado em: 2004