نتایج جستجو برای: water alternating gas

تعداد نتایج: 797525  

2012
E. Gauthier Q. Duan T. Hellstern J. Benziger

The gas diffusion layer (GDL) is an essential element of the electrodes in polymer electrolyte membrane (PEM) fuel cells. The GDL makes electrical contact with the catalyst layers to provide a larger area to carry the electronic current from the catalyst to the bipolar plates reducing the resistance for current flow. The GDL must be porous to permit the flow of reactant gas from the gas flow ch...

Journal: :Journal of Petroleum Exploration and Production Technology 2021

Abstract After single-gas (SG) injection operations in tight oil reservoirs, a significant amount of is still unrecovered. To increase productivity, several sequencing gas techniques have been utilized. Given the scarcity research on multiple-gas alternating schemes, this study propose an optimized triple-alternating-gas (TAG) for improved recovery. The performance TAG process was demonstrated ...

Journal: :Mechanical Engineering 2005

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
André Klauss Michael Haumann Holger Dau

Water oxidation by cyanobacteria, algae, and plants is pivotal in oxygenic photosynthesis, the process that powers life on Earth, and is the paradigm for engineering solar fuel-production systems. Each complete reaction cycle of photosynthetic water oxidation requires the removal of four electrons and four protons from the catalytic site, a manganese-calcium complex and its protein environment ...

In gas power plants, a lot of energy is lost in the form of heat more than the electricity produced. In the present research, techno-economic evaluation of combined power, desalination and cooling systems running by the exhaust flue gases of a gas turbine in Iran is performed. In addition to using power generated by the gas turbine, attempts were made to use Organic Rankine Cycle to recover the...

2017
Peter Berg

Exchange of gases, such as O2, CO2, and CH4, over the air–water interface is an important component in aquatic ecosystem studies, but exchange rates are typically measured or estimated with substantial uncertainties. This diminishes the precision of common ecosystem assessments associated with gas exchanges such as primary production, respiration, and greenhouse gas emission. Here, we used the ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Christopher M Reddy J Samuel Arey Jeffrey S Seewald Sean P Sylva Karin L Lemkau Robert K Nelson Catherine A Carmichael Cameron P McIntyre Judith Fenwick G Todd Ventura Benjamin A S Van Mooy Richard Camilli

Quantitative information regarding the endmember composition of the gas and oil that flowed from the Macondo well during the Deepwater Horizon oil spill is essential for determining the oil flow rate, total oil volume released, and trajectories and fates of hydrocarbon components in the marine environment. Using isobaric gas-tight samplers, we collected discrete samples directly above the Macon...

2015
Ine Vandecasteele Inés Marí Rivero Serenella Sala Claudia Baranzelli Ricardo Barranco Okke Batelaan Carlo Lavalle

Shale gas is currently being explored in Europe as an alternative energy source to conventional oil and gas. There is, however, increasing concern about the potential environmental impacts of shale gas extraction by hydraulic fracturing (fracking). In this study, we focussed on the potential impacts on regional water resources within the Baltic Basin in Poland, both in terms of quantity and qua...

Journal: :Eos, Transactions American Geophysical Union 1999

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