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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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 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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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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Combustion of advanced non-toxic hybrid propellants
Combustion characteristics and fuel regression behaviour have been studied for two fuels utilising 98% rocket-grade hydrogen peroxide (RGHP) as oxidiser. Two test series (A and C) involved a total of 13 firings of dicyclopentadiene (DCPD) fuel grains and series B involved nine firings of DCPD grains loaded with various amounts of lithium aluminium hydride, LiAlH4 (LAH). A laboratory-scale ...
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Evaluation of low-cost cathode catalysts for high yield biohydrogen production in microbial electrolysis cell
As an ideal fuel due to the advantages of no pollution, high combustion heat and abundant sources, hydrogen gas can be produced from organic matter through the electrohydrogenesis process in microbial electrolysis cells. But in many MECs, platinum is often used as catalyst, which limits the practical applications of MECs. To reduce the cost of the MECs, Ni-based alloy cathodes were developed by ...
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Valorising By-Product Hydrogen - Case Study
Overview Electrochemical processes, such as the industrial production of caustic soda and chlorine, use large quantities of electricity which contribute significantly to production costs, up to 70% in some cases. They also produce hydrogen as a waste product (see diagram), which is either combusted or vented to the atmosphere. Fuel cells offer a highly efficient method of utilising this ...
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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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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 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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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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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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Hydrogen production by catalytic methane decomposition and catalyst regeneration by oxygen mixtures in fluidised and fixed bed reactors
In the present paper, the Thermo-Catalytic Decomposition (TCD) of methane has been investigated in a laboratory-scale bubbling fluidised bed reactor using copper dispersed on γ-alumina as a catalyst. The usefulness of a fluidised bed operation instead of a fixed bed operation has been assessed in terms of methane-to-hydrogen conversion and the amount of carbon accumulated on the catalyst. The ...
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Proton Power 25m3 DIY Syngas Storage
Based in Tennessee USA Proton Power Inc. (PPI) was founded by 2 remarkable entrepreneurs with previous successes in such diverse areas as aircraft brakes and neutron absorbers (don’t ask!). With this kind of history we knew their requirement was going to be beyond our usual scope. We weren’t wrong - they requested a 25m3 Base gas holder in which to store a syngas mixture with high ...
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Urgently sought by business: more renewable energies
While some in politics and the public still believe that they are doing Greta a favor with more renewables, the calls of the economy for a much faster expansion of renewable energies are getting louder. Who are the actors and what is behind them? RE100 - global large companies want 100% Renewable The RE100 initiative I mentioned in the last blog, and was asked again to respond. This initiative ...
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