Production of hydrogen

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  • Biofuels Engineering Process Technology has many contents: Harvesting Energy from Biochemical Reactions, Microbial Modeling of Biofuel Production, Biofuel Feedstocks, Ethanol Production, Biodiesel, Biological Production of Hydrogen, Microbial Fuel Cells.

    pdf385p doremon3244 04-06-2014 68 22   Download

  • The operating characteristics of hydrogen iodide (HI) decomposition for hydrogen production were investigated using the commercial computational fluid dynamics code, and various factors, such as hydrogen production, heat of reaction, and temperature distribution, were studied to compare device performance with that expected for device development. Hydrogen production increased with an increase of the surface-to-volume (STV) ratio.

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  • Processes of hydrogenation of cottonseed oil on effective catalysts have been studied. Influence of technological factors on hydrogenation processes has been studied. Production of desired fats with minimum content of transisomerized fatty acids has been attained.

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  • The two most important environmental hazards faced by humankind today are air pollution and global warming. Both have a direct link with our current overdependence on fossil fuels. Pollutants produced from combustion of hydrocarbons now cause even more health problems due to the urbanization of world population

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  • This study investigated effect of initial pH and current intensity on both the amount of hydrogen peroxide production and the Glyphosate mineralization performance. The results indicated that at pH 3, the quantity of H2O2 production on cathode was highest (~0.15 mg/L), and the Glyphosate mineralization performance was optimum, approximately 60% at an electrolysis time of 50 min.

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  • Oxidative phosphorylation is a source of energy production by which many cells satisfy their energy requirements. Endogenous reactive oxygen species (ROS) are by-products of oxidative phosphorylation. ROS are formed due to the inefficiency of oxidative phosphorylation, and lead to oxidative stress that affects mitochondrial metabolism.

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  • Antifungal activity of lactic acid bacteria in food preservation is one of the technological properties sought. The antifungal effect of lactic acid bacteria has been studied. Four strains namely Lactobacillus plantarum G100, Lactobacillus brevis L62, Lactobacillus rhamnosus THT and Pediococcus pentosaceus Hela showed inhibitory activity against Tricoderma F14, Penicillium canescens 10-10 C, Aspergillus niger and Rhyzopus stoloniferous. Antifungal activity of L. rhamnosus THT strain depended mostly on the presence of these organic acids. L. brevis L62 and P.

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  • Plant growth promoting rhizobacteria are found in the rhizosphere of plants worldwide and enhance their growth and development under unfavorable environmental condition. In the present investigation, twelve plant growth promoting rhizobacteria were isolated from the rhizosphere of different plants. Among these isolated rhizobacteria, identified one out of twelve, which showed best biofertilizer activity efficiently and also performing well under salt stress environment.

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  • Understanding the adsorption characteristics of CH3OH and CH3O on the noble metal surfaces is essential for designing better catalysts for the on-board production of hydrogen from CH3OH. This study aims to provide insights into the adsorption behavior of these molecules on Ir(111) surface.

    pdf7p kequaidan10 05-03-2021 5 0   Download

  • Polychlorinated biphenyls (PCBs) are a family of chemical compounds which do not exist in nature but which are manmade. Commercial mixtures are clear, pale yellow liquids manufactured by the replacement of hydrogen atoms on the biphenyl molecule by chlorine. The reaction is controlled according to the percentage replacement of hydrogen and results in a product which contain chlorobiphenyls with one or, more usually, several chlorine atoms attached to each molecule.

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  • Hydrogen and synthesis gas (syngas) are indispensable in chemical, oil, and energy industries. They are important building blocks and serve as feedstocks for the production of chemicals such as ammonia and methanol. Hydrogen is used in petroleum refi neries to produce clean transportation fuels, and its consumption is expected to increase dramatically in the near future as refi ners need to process increasingly heavier and sour crudes.

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  • Hydrogen and fuel cells are seen by many as key solutions for the 21st century, enabling clean efficient production of power and heat from a range of primary energy sources. The High Level Group for Hydrogen and Fuel Cells Technologies was initiated in October 2002 by the Vice President of the European Commission, Loyola de Palacio, Commissioner for Energy and Transport, and Mr Philippe Busquin, Commissioner for Research.

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  • Hydrogen economy represents the future of human civilization. Limited resources of our planet are compelling us to turn to renewable clean energy resources and hydrogen figures prominently as the energy carrier of a future sustainable energy system. There are significant challenges to be overcome in order to make hydrogen viable, in production, storage and power generation, while safety of operation is an ever-present factor that determines success or failure of a proposed solution.

    pdf398p cucdai_1 19-10-2012 56 7   Download

  • Amines are extremely important intermediates and end products of the chemical industry and are often obtained by hydrogenation of the corresponding nitro compounds or imines. A search of the literature reveals, that hydrogenation of nitro compounds catalyzed by well-defined molecular complexes in aqueous solutions is rare.

    pdf51p ruavanguom 25-09-2012 58 6   Download

  • Author does not make any warranty or assumes any legal liability or responsibility for the accuracy, completeness, or any third party’s use of any information, product, procedure, or process disclosed, or represents that its use would not infringe privately owned rights. Any electronic website link in this book is provided for user convenience and its publication does not constitute or imply its endorsement, recommendation, or favouring by the author.

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  • Recovering useful hydrocarbons from sewage sludge using zirconia-supporting iron oxide catalysts was investigated. Zirconia has activity for decomposing water molecules to generate active oxygen and hydrogen species.

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  • In the present study, we used response surface methodology (RSM) to investigate the mutual effect of glucose, yeast extract, and iron concentration to more improve hydrogen production using the pure Clostridium sp. Tr2.

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  • The impact of aluminium (Al) stress on the production of hydrogen peroxide and on the activity of antioxidant enzymes involved in oxidative metabolism, such as ascorbate peroxidase (APX), peroxidase (POD), and catalase (CAT), were studied in seedlings of 2 clover species (Trifolium alexandrinum L. and Medicago sativa L.).

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  • The results also indicated that the chemical conversion rate of hydrogen production was in direct proportion to the mass of Na2CO3, while the solid product was Na2UO4, instead of Na2U2O7. Nevertheless the thermochemical cycle used for hydrogen generation can be closed, and chemical compounds used in these processes can also be recycled. So the cycle with Na2UO4 as its first reaction product has an advantage over the proposed UTC process, attributed to the fast reaction rate and high hydrogen yield in the first reaction step.

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  • Biofuel research is currently an area of immense interest due to the increase in global energy demand by emerging economies and the recent increases in global oil prices. Multiple approaches are currently being researched for the use of microorganisms in the production of various biofuel (e.g. alcohols, hydrogen, biodiesel, and biogas) from multiple starting materials.

    pdf9p kethamoi1 20-11-2019 4 0   Download



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