Marrying gas power and hydrogen energy: A catalytic system for combining methane conversion and hydrogen generation

2009 ◽  
Vol 11 (7) ◽  
pp. 921 ◽  
Author(s):  
Jurriaan Beckers ◽  
Cyril Gaudillère ◽  
David Farrusseng ◽  
Gadi Rothenberg
Keyword(s):  
Catalytic System ◽  
Methane Conversion ◽  
Hydrogen Generation ◽  
Hydrogen Energy

scholarly journals Kinetics of Hydrogen Generation from Oxidation of Hydrogenated Silicon Nanocrystals in Aqueous Solutions

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1413 ◽  
Author(s):  
Gauhar Mussabek ◽  
Sergei A. Alekseev ◽  
Anton I. Manilov ◽  
Sergii Tutashkonko ◽  
Tetyana Nychyporuk ◽  
...  
Keyword(s):  
Silicon Nanocrystals ◽  
Silicon Nanoparticles ◽  
Hydrogen Generation ◽  
Hydrogen Release ◽  
Water Molecules ◽  
Hydrogen Energy ◽  
Hydrogenated Silicon ◽  
Energy Applications ◽  
Kinetics Of ◽  
Silicon Nanopowders

Hydrogen generation rate is one of the most important parameters which must be considered for the development of engineering solutions in the field of hydrogen energy applications. In this paper, the kinetics of hydrogen generation from oxidation of hydrogenated porous silicon nanopowders in water are analyzed in detail. The splitting of the Si-H bonds of the nanopowders and water molecules during the oxidation reaction results in powerful hydrogen generation. The described technology is shown to be perfectly tunable and allows us to manage the kinetics by: (i) varying size distribution and porosity of silicon nanoparticles; (ii) chemical composition of oxidizing solutions; (iii) ambient temperature. In particular, hydrogen release below 0 °C is one of the significant advantages of such a technological way of performing hydrogen generation.

Methane conversion with carbon dioxide in plasma-catalytic system

Fuel ◽  
2014 ◽  
Vol 117 ◽  
pp. 608-617 ◽  
Author(s):  
K. Krawczyk ◽  
M. Młotek ◽  
B. Ulejczyk ◽  
K. Schmidt-Szałowski
Keyword(s):  
Carbon Dioxide ◽  
Catalytic System ◽  
Methane Conversion

scholarly journals Hydrogen energy: Terceira island demonstration facility

2008 ◽  
Vol 14 (2) ◽  
pp. 77-95 ◽  
Author(s):  
Mario Alves
Keyword(s):  
Hydrogen Generation ◽  
Public Awareness ◽  
Geographical Location ◽  
Primary Energy ◽  
Processing Plant ◽  
Hydrogen Energy ◽  
Sea Waves ◽  
Hydrogen Economy ◽  
Under Construction ◽  
Renewable Hydrogen

The present paper gives a general perspective of the efforts going on at Terceira Island in Azores, Portugal, concerning the implementation of an Hydrogen Economy demonstration campus. The major motivation for such a geographical location choice was the abundance of renewable resources like wind, sea waves and geothermal enthalpy, which are of fundamental importance for the demonstration of renewable hydrogen economy sustainability. Three main campus will be implemented: one at Cume Hill, where the majority of renewable hydrogen production will take place using the wind as the primary energy source, a second one at Angra do Heroismo Industrial park, where a cogen electrical heat power station will be installed, mainly to feed a Municipal Solid Waste processing plant and a third one, the Praia da Vitoria Hydrogenopolis, where several final consumer demonstrators will be installed both for public awareness and intensive study of economic sustainability and optimization. Some of these units are already under construction, particularly the renewable hydrogen generation facilities.

scholarly journals Hydrolysis-Based Hydrogen Generation Investigation of Aluminum System Adding Low-Melting Metals

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1433
Author(s):  
Zeng Gao ◽  
Fei Ji ◽  
Dongfeng Cheng ◽  
Congxin Yin ◽  
Jitai Niu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Hydrogen Production ◽  
Hydrogen Generation ◽  
Production Capacity ◽  
Graphite Crucible ◽  
Production Performance ◽  
Second Phase ◽  
Hydrogen Energy ◽  
Reaction Products ◽  
Scanning Calorimetry

In this age of human civilization, there is a need for more efficient, cleaner, and renewable energy as opposed to that provided by nonrenewable sources such as coal and oil. In this sense, hydrogen energy has been proven to be a better choice. In this paper, a portable graphite crucible metal smelting furnace was used to prepare ten multi-element aluminum alloy ingots with different components. The microstructure and phase composition of the ingots and reaction products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The reaction was carried out in a constant temperature water bath furnace at 60 °C, and the hydrogen production performance of the multi-element aluminum alloys in different proportions was compared by the drainage gas collection method. The experimental results show that the as-cast microstructure of Al–Ga–In–Sn aluminum alloy is composed of a solid solution of Al and part of Ga, and a second phase of In3Sn. After the hydrolysis reaction, the products were dried at 150 °C and then analyzed by XRD. The products were mainly composed of AlOOH and In3Sn. Alloys with different compositions react at the same hydrolysis temperature, and the hydrogen production performance is related to the ratio of low-melting-point metal elements. By comparing two different ratios of Ga–In–Sn (GIS), the hydrogen production capacity and production rate when the ratio is 6:3:1 are generally higher than those when the ratio is 7:2:1. The second phase content affects the hydrogen production performance.

Metal Hydride Reactor Design Optimization for Hydrogen Energy Storage

2016 ◽  
Vol 708 ◽  
pp. 85-93 ◽  
Author(s):  
Vamsi Krishna Kukkapalli ◽  
Sun Woo Kim
Keyword(s):  
Heat Transfer ◽  
Metal Hydride ◽  
Hydrogen Absorption ◽  
High Pressures ◽  
Hydrogen Generation ◽  
Renewable Energy Sources ◽  
Hydrogen Gas ◽  
Attractive Alternative ◽  
Hydrogen Energy ◽  
Metal Hydride Alloys

As hydrogen generation technologies using renewable energy sources are being developed, considerable attention is paid to storage and transportation of hydrogen gas. Metal hydride alloys are considered as promising materials because they are viewed as an attractive alternative to conventional hydrogen storage cylinders and mechanical hydrogen compressors. Compared to storing in a classic gas cylinder, which requires compression of hydrogen at high pressures, metal hydride alloys can store the same amount of hydrogen at nearly room pressure. However, this hydrogen absorption necessitates an effective way to reject the heat released from the exothermic hydriding reaction. In this paper, fin structures are employed to enhance the heat transfer of metal hydride alloys in a cylindrical reactor. Numerical simulations are performed based on a multiple-physics modeling to analyze the transient heat transfer during the hydrogen absorption process. The objective is to minimize the time elapsed for the process and to reduce the hotspot temperature by determining the number and shape of rectangular fins while the total volume of fins used are fixed. The simulation results show that the more fins are applied the better heat transfer is achieved and that there exists an optimal length of the fins.

Cobalt Nitride Supported on Nickel Foam as Bifunctional Catalyst Electrodes for Urea Electrolysis-Assisted Hydrogen Generation

NANO ◽  
2019 ◽  
Vol 14 (12) ◽  
pp. 1950152 ◽  
Author(s):  
Xinzhu Wen
Keyword(s):  
High Performance ◽  
Hydrogen Generation ◽  
Nickel Foam ◽  
Bifunctional Catalyst ◽  
Energy Storage And Conversion ◽  
Bifunctional Catalysts ◽  
Hydrogen Energy ◽  
Water Decomposition ◽  
Urea Electrolysis ◽  
Calcination Method

Replacing the high theoretical potential of anodic water decomposition (oxygen evolution reaction) with the low theoretical potential of urea oxidation reaction (UOR) is an urgent need for hydrogen energy storage and conversion. Cobalt nitride nanoflakes, high-performance bifunctional catalysts supported on nickel foam (Co[Formula: see text]N NF/NF), were synthesized by hydrothermal and calcination method. The morphology and composition of the catalyst were studied by XRD, XPS, SEM, TEM, HRTEM and elemental analysis. In order to conduct electrochemical performance and stability, a two-electrode electrolyzer composed of Co[Formula: see text]N NF/NF as both anode and cathode materials is constructed (Co[Formula: see text]N NF/[Formula: see text]N NF/NF). Only a voltage of 1.687[Formula: see text]V is needed to complete 100[Formula: see text][Formula: see text]. It is much lower than the voltage of Pt/[Formula: see text] (1.816[Formula: see text]V), because of which it is believed that this work provides a valuable route for the design of inexpensive and efficient urea electrolysis-assisted hydrogen generation.

Impact of Carrier Lifetime on Efficiency of Photolytic Hydrogen Generation by p-Type SiC

2014 ◽  
Vol 778-780 ◽  
pp. 503-506 ◽  
Author(s):  
Keiko Miyake ◽  
Tomonari Yasuda ◽  
Masashi Kato ◽  
Masaya Ichimura ◽  
Tomoaki Hatayama ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Carrier Lifetime ◽  
Hydrogen Generation ◽  
Hydrogen Energy ◽  
Energy Technology ◽  
Next Generation ◽  
Carrier Lifetimes ◽  
P Type ◽  
Selection Of

The photolytic hydrogen generation using sunlight attracts attention as a next generation energy technology. A key of this technology is a selection of materials for the photolysis and SiC is one of the candidate materials for this application. The conversion efficiency from the solar to the hydrogen energy would be affected by the carrier lifetime in SiC. Therefore, in this study, we measured carrier lifetimes in SiC and compared them with photocurrents in electrolytes that is directly correlated to the conversion efficiency.

Base-free hydrogen generation from methanol using a bi-catalytic system

2014 ◽  
Vol 50 (6) ◽  
pp. 707-709 ◽  
Author(s):  
Angèle Monney ◽  
Enrico Barsch ◽  
Peter Sponholz ◽  
Henrik Junge ◽  
Ralf Ludwig ◽  
...  
Keyword(s):  
Catalytic System ◽  
Hydrogen Generation ◽  
Free Hydrogen
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