NATURALHY: Assessing the potential of the existing …

2013-11-22 · • The conditions under which hydrogen can be added to natural gas in the existing natural gas system with acceptable consequences • Technologies for the selective withdrawal of hydrogen from hydrogen/natural gas mixtures • Socio-economic and environmental consequences of …

International Forum on Pressure Vessels for Hydrogen …

2014-3-13 · International Forum on Pressure Vessels for Hydrogen and Natural Gas Vehicles COMPOSITE TANK TESTING, > ASME has recently approved the use of composite tanks for hydrogen . 10 Temperature gradients throughout the fuel system

First-principles calculations of hydrogen solution and diffusion

2015-9-20 · : First-principles calculations of hydrogen solution and diffusion in tungsten:Temperature and defect-trapping effectsXiang-Shan Kong,aSheng Wang

-Electrochemical generation of hydrogen via the

2018-3-9 · The costs of a mature hydrogen pipeline system would be spread over many users, as the cost of the natural gas system is today, but it is difficult to imagine the transition.

Basic Hydrogen Strategy - meti.go.jp

2018-11-20 · a large-scale hydrogen supply system (by the second half of the 2020s) While increasing hydrogen demand further, Japan will increase the scope of current hydrogen sources to cover unused energy sources and establish a new secondary energy structure including hydrogen in addition to traditional electricity and heat.

THE METAL HYDROGEN SYSTEM: INTERPHASE …

2011-3-3 · THE METAL HYDROGEN SYSTEM: INTERPHASE PARTICIPATION IN H–TRANSPORT P.A. Mosier–Boss and S. Szpak Naval Control, Command and Ocean Surveillance Center RDT&E Division, SanDiego, CA 92152-6171 and J.J. Smith US Department of Energy, Washington, DC 20585 ABSTRACT The metal/hydrogen system is a key element in the construction of ecologically

Scenario input–output analysis on the diffusion of fuel

We estimate the carbon dioxide reduction effect of our new hydrogen-generating system and compare it with the current steam reforming method by applying scenario input–output analysis. Our new system is expected to lower carbon dioxide emissions to 14.1% of the conventional system in the industrial sector.

Technical Reference on Hydrogen Compatibility of Materials

2008-6-2 · Technical Reference on Hydrogen Compatibility of Materials Nonmetals: Polymers (code 8100) 1. General Polymers are a diverse egory of materials characterized by chains of covalently-bonded atoms with repeating structural units. The materials can be processed in numerous ways with almost infinite variation.

Open Repository of National Natural Science Foundation of

2016-12-8 · AB2 Gaseous and electrochemical hydrogen storage kinetics of as-quenched nanocrystalline and amorphous Mg2Ni

Hydrogen dissociation and diffusion on transition metal (= Ti

Hydrogen dissociation and diffusion on transition metal (= Ti, Zr, V, Fe, Ru, Co, Rh, Ni, Pd, Cu, Ag_IT/_ 66|4 Hydrogen dissociation and diffusion

US5637259A - Process for producing syngas and …

Novel procedures are described for the production of syngas fuel intermediates from abundantly available natural gas. The novel procedures include: (a) providing a double tubular hydrogen transfer reactor having an inner tubular wall defining a heated reaction zone containing a alyst and an outer tubular wall defining an annular zone between the tubular walls, said inner tubular wall

A Fully Integrated Hydrogen Diffusion System | …

The Company has since progressed from building a range of silver-palladium diffusion cells to the design and construction of commercial scale units and then to supplying the diffusion system for plant used in the production of high-purity hydrogen from dissociated ammonia . Now, through a newly formed Apparatus and Systems Division, and based

Chemical Properties and Diffusion - Hydrogen - …

2019-3-23 · Hydrogen is the element with the highest diffusion capacity because of its small size and small mass. Some diffusion coefficients [25] of hydrogen in gases and liquids are listed in (Table 4.10). In metals with a high hydrogen solubility a high hydrogen diffusion rate is also usually found.

Hydrogen diffusion in natural and synthetic …

Hydrogen diffusion in pyroxene is in the same range at the same temperature as that of olivine (10 −11 –10 −9 m 2 /s) i.e., hydrogen diffusion is very rapid in both phases (see Ingrin and

PSA Hydrogen Generator_PSA Hydrogen …

PSA hydrogen generator is based on mixed air which contains hydrogen gas (ammonia gas, methanol reforming , natural gas reforming) as raw material air, by using special molecular sieves, taking PSA(pressure Swing Adsorption) principle to make hydrogen gas. Because the different of

‘The effects of hydrogen injection in natural gas networks

2017-7-20 · The permitted hydrogen content within the Dutch gas distribution system varies in respective parts of the country between 0.02 % and 0.5 %. In order to standardise the hydrogen admixture to a value of 0.5 % the consequences of hydrogen injection into the natural gas distribution system for

Merane gas separation - Wikipedia

2019-4-23 · There are three main diffusion mechanisms. The first (b), Knudsen diffusion holds at very low pressures where lighter molecules can move across a merane faster than heavy ones, in a material with reasonably large pores. The second (c), molecular sieving, is the case where the pores of the merane are too small to let one component pass, a process which is typically not practical in gas

Hydrogen storage - Wikipedia

2019-5-4 · Compressed hydrogen. Compressed hydrogen is a storage form where hydrogen gas is kept under pressures to increase the storage density. Compressed hydrogen in hydrogen tanks at 350 bar (5,000 psi) and 700 bar (10,000 psi) is used for hydrogen tank systems in vehicles, based on type IV carbon-composite technology. Car manufacturers have been developing this solution, such as Honda …

Diffusion of Hydrogen in the α-Phase of the Palladium

Diffusion constants for hydrogen in the low H-content α-phase of the Pd-H2 system have been determined between 0 and 50° utilizing the technique of rapid H2 absorption by a …

Hydrogen Permeation | Yokogawa America

Hydrogen Permeation. Hydrogen permeation is the diffusion of hydrogen ions through the thin metal isolation diaphragms used in pressure transmitters either through interstitial or substitutional (vacancy) mechanisms. Interstitial mechanisms: All metals have a natural lattice structure.

Production of Hydrogen - Stanford University

2005-5-31 · Production of Hydrogen Plate-Fin Reformer alyst can be a surface coating or a porous insert. Need to match the heat release rate with the steam hydrocarbon reforming rate. Very compact and potentially low cost system Fuel Gas + Air Natural Gas + Steam Metal Metal Metal Metal

Hydrogen storage - Wikipedia

2019-5-4 · Compressed hydrogen. Compressed hydrogen is a storage form where hydrogen gas is kept under pressures to increase the storage density. Compressed hydrogen in hydrogen tanks at 350 bar (5,000 psi) and 700 bar (10,000 psi) is used for hydrogen tank systems in vehicles, based on type IV carbon-composite technology. Car manufacturers have been developing this solution, such as Honda …

Hydrogen separation from blended natural gas and …

Hydrogen flux was first measured under pure hydrogen and the natural gas concentration was increased in steps after achieving a steady flux at each step. Hydrogen permeability was calculated according to Eq. , assuming hydrogen diffusion through the bulk of the merane as the rate-limiting step for thick Pd and Pd alloy meranes .

4. Transportation, Distribution, and Storage of …

2002-12-2 · In any future hydrogen-based economy, key economic determinants will be the cost and safety of the fuel distribution system from the site of manufacture of the hydrogen to the end user. This is true of any fuel, but hydrogen presents unique challenges because of its high diffusivity, its extremely

Open Repository of National Natural Science Foundation of

2016-12-8 · Direct numerical simulation; Hydrogen; Swirling; Premixed flame; Flame structure; Preferential diffusion effects