hydrogen combustion Articles
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Safety assessment of iodine and hydrogen released during a severe accident in a pressurised water reactor
In the case of a severe accident in a nuclear power plant, iodine is considered one of the most important fission products, from the health effect point of view, and hydrogen represents a great risk to the containment integrity. Using the containment spray system, to reduce the amount of iodine released to the environment, may increase the probability of hydrogen combustion by condensing steam. ...
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Hydrogen energy for the transportation sector in China
Hydrogen is a promising energy carrier for providing a clean, reliable and affordable energy supply. This paper provides a blueprint for the hydrogen energy in the transportation sector in the future of China. This paper is divided into three parts. The first part answers this question: why is China interested in hydrogen energy? The second part describes the possibility of a hydrogen fuel cell ...
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Hydrogen production from formic acid solution by modified TiO2 and titanate nanotubes in a two-step system under visible light irradiation
Hydrogen gas is one of the most promising renewable energy sources, and the final product of hydrogen combustion is nothing but water. However, it is still a big challenge to produce hydrogen and store it. Many studies have been conducted into produce hydrogen from water using photocatalysts. Z-scheme photocatalysis is a two-photocatalyst system that comprises a hydrogen catalyst and an oxygen ...
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Performance evaluation of a hydrogen-ethanol fuelled engine
The work presented in the paper is an attempt to evaluate the performance characteristics of a hydrogen?ethanol dual fuel combination with different percentage substitutions of hydrogen (i.e. 0-80% with an increment of 20% by volume) at three different compression ratios of 7:1, 9:1 and 11:1 with varying equivalence ratios. In the present study, experimental investigations have been carried out ...
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Hydrogen-diesel dual fuel combustion in a direct injection diesel engine
Hydrogen is expected to be one of the most important fuels in the near future to meet the stringent emission norms. Hence in the present study, the combustion of hydrogen-diesel duel fuelled engine was investigated. Hydrogen was injected in the intake port during the suction stroke and diesel was injected inside the combustion chamber near TDC. The start of injection for hydrogen was maintained ...
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A new Rankine cycle for hydrogen-fired power generation plants and its exergetic efficiency
A novel power generation cycle is proposed in this paper taking hydrogen as fuel and using steam generated by hydrogen firing as working fluid. The progress of the development work and side issues such as the application of hydrogen combustion turbines to environmentally clean fossil fuel power plants for early commercialisation of the system are reviewed. We propose the hydrogen-fired Rankine ...
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Magnesium-nickel hydrogen storage alloys prepared by hydriding combustion synthesis followed by mechanical milling
Recent progress is reviewed in the preparation of highly active magnesium-based hydrogen storage alloys by the combined process of Hydriding Combustion Synthesis (HCS) and Mechanical Milling (MM). The structural transformation of the alloys during MM determined by means of X-ray Diffraction (XRD) and the hydrogen storage properties of the alloys measured by means of ...
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Effect of hydrogen enriched air on the performance and emissions of mahua oil fuelled diesel engine
Neat vegetable oils as fuels for diesel engines give rise to engine performance and durability problems due to the differences in some of the properties between vegetable oils and diesel. The objective of the present work was to improve the performance of mahua oil fuelled diesel engine using hydrogen enriched air. Mahua oil was used as the main fuel in a direct injection diesel engine and ...
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Hydrogen Production and Carbon Capture by Gas-Phase Methane Pyrolysis: A Feasibility Study
In order to reduce carbon dioxide (CO2) emissions, fossil fuels such as oil and natural gas must be replaced by climate-neutral alternatives in the medium and long term. In this regard, hydrogen (H2) is considered as one of the most promising carbon-free energy carriers, since it is already nowadays vastly used in the chemical industry, for instance for refining processes or the production of key ...
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Combined fuel cell?gas turbine plant for highly efficient power generation from renewable energy sources
The impact of renewable energy sources on today's energy supply substantiates the importance of hydrogen as an energy carrier. Hydrogen can be directly produced from solar energy and is considered a promising technology for temporary storage of electrical energy from wind turbines and photovoltaic systems. The generation of electrical energy from stored hydrogen requires highly efficient systems ...
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SnO 2 -Nafion ® nanocomposite polymer electrolytes for fuel cell applications
Fuel cells are capable to exploit the combustion of hydrogen to convert chemical energy into electricity. Polymer electrolyte fuel cells based on Nafion membranes are able to work in a relatively low temperature range (70–90ºC) but require operating relative humidity (RH) close to 100%. To develop proton-exchange membranes with adequate performances at low RH, an attractive strategy ...
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Hydrogen as Future Fuel for Gas Engines
Gas engines are providing a wide range of fuel flexibility from burning natural gas and a variety of non- natural gaseous fuels from low British Thermal Unit (BTU) gases as well as gases containing a high hydrogen content. Hydrogen containing gases can be found as by-product from steel (furnace gas) or chemical process, or alternatively hydrogen is produced and blended to natural gas. In the ...
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An experimental investigation of hydrogen-enriched unmodified DI diesel engine in dual fuel mode
In recent years, the concern for cleaner air, along with strict air pollution regulation and the desire to reduce the dependency on fossil fuels have rekindled the interest in hydrogen as a vehicular fuel. Internal combustion engines continue to dominate in many fields like transportation, agriculture and power generation. Diesel engines are the most trusted power sources in the transportation ...
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Hydrogen production through chemical looping using NiO/NiAl2O4 as oxygen carrier
A new autothermal route to produce hydrogen from natural gas via chemical looping technology was investigated. Nowadays, 90% of the worldwide produced hydrogen comes from fossil fuels, the most common process being Steam Methane Reforming (SMR), which produces several kg of CO2 equivalent per kg of hydrogen. In classic SMR technology, most of the greenhouse gases are vented to the atmosphere. ...
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Hydrogen storage systems for automotive applications: project StorHy
Around two thirds of world's oil usage is associated with transportation with road vehicles consuming around 40%. Also, transportation accounts for around 25% of greenhouse emissions worldwide, with around 90% coming from road vehicles. This situation is further complicated by the fact that oil reserves are running out. For this reason, the automotive industry supported by relevant governing ...
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Study of the performance and exhaust emissions of a spark-ignited engine operating on syngas fuel
To resolve the problem of depletion of petroleum based liquid fuels, various solutions have been proposed. One of them is the use of gaseous fuels that are generated from the gasification of woods, namely syngas or wood-gas fuels, as full supplement fuels in spark ignition internal combustion (IC) engines. This fuel consists of nearly 40% combustible gases, mainly hydrogen and carbon monoxide ...
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Heating Value
The lower heating value (LHV) or higher heating value (HHV) of a gas is an important consideration when selecting a gas engine or CHP plant. Gas engines efficiency is typically quoted based upon the LHV of the gas. Whenever a hydrocarbon fuel is burned one product of combustion is water. The quantity of water produced is dependent upon the amount of hydrogen in the fuel. Due to high combustion ...
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Charcoal Making Machine: Revolutionizing Agricultural Biomass Waste
In the delicate balance between agricultural productivity and environmental conservation, a silent challenge persists: the management of agricultural biomass waste. This often-neglected residue presents both a quandary and an opportunity. Enter the charcoal making machine – an ingenious solution that not only addresses the issue of waste but also pioneers a sustainable path towards a ...
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Alternative Fuels - A Look At the Current Environment
Overview Vehicles powered by gasoline and diesel account for emissions of dangerous air pollutants and contribute to the presence of greenhouse gases. Consumers, businesses, and public entities looking for environmentally friendly alternatives to gasoline and diesel-powered cars and trucks have viable choices beyond the well-known battery electric and plug-in hybrid electric variants. Other ...
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Slag costs the power industry billions $ per year
You’ve Heard Of Coal. Ever Hear Of Slag? Globally coal is continuing to serve the modern and developing world’s energy interests. Any energy expert will tell you the power and influence of Coal on the power sector is undeniable. Coal is cheap, abundant and available to developing countries that intend to utilize it. Coal will remain popular in coal dependent Asian countries like ...
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