scholarly journals RESEARCH OF GENERAL HYDROGEN TECHNOLOGY ACCORDING TO OPTIMAL PARAMETERS AS A COMPONENT OF COMPLEX DEVELOPMENT OF EFCE AND CFE-UA ASSOCIATIONS

2021 ◽  
pp. 83-91
Author(s):  
Mykola Zipunnikov ◽  
Svetlana Bukhkalo
Keyword(s):  
Heterogeneous Systems ◽  
Hydrogen Energy ◽  
Hydrogen Fuel Cell ◽  
Production Of Hydrogen ◽  
Heterogeneous Processes ◽  
Complex Development ◽  
Gas Generators ◽  
Process Factors ◽  
Classical Thermodynamics ◽  
Development Center

The analysis of the prospects for the development of hydrogen energy in the EU and Ukraine is carried out. The possibilities of implementing projects and technologies for the production of green hydrogen for industrial use are considered. The conditions for the implementation of the project for the creation of a research and development center for hydrogen and hydrogen fuel cell technology are presented. A review of publications devoted to the process of obtaining hydrogen from water has been completed. The main factors influencing the course of reactions in the production of hydrogen from water using alloys are considered. Recommended alloys for producing hydrogen at autonomous facilities. The components of the research algorithm are given taking into account the system of process factors based on the analysis of literature data on the technology of hydrogen production by the electrolysis of water. The general principles of calculating gas generators have been established, which should be based on the basic principles of the thermodynamics of heterogeneous processes: classical thermodynamics of multiphase and heterogeneous systems.

Compressor Issues for Hydrogen Production and Transmission Through a Long Distance Pipeline Network

2008 ◽  
Vol 59 (4) ◽  
Author(s):  
Fred Starr ◽  
Calin-Cristian Cormos ◽  
Evangelos Tzimas ◽  
Stathis Peteves
Keyword(s):  
Pressure Ratio ◽  
High Strength Steels ◽  
High Strength ◽  
Energy System ◽  
Pipeline System ◽  
Hydrogen Energy ◽  
Long Distance ◽  
System Pressure ◽  
Production Of Hydrogen ◽  
Plant Exit

A hydrogen energy system will require the production of hydrogen from coal-based gasification plants and its transmission through long distance pipelines at 70 � 100 bar. To overcome some problems of current gasifiers, which are limited in pressure capability, two options are explored, in-plant compression of the syngas and compression of the hydrogen at the plant exit. It is shown that whereas in-plant compression using centrifugal machines is practical, this is not a solution when compressing hydrogen at the plant exit. This is because of the low molecular weight of the hydrogen. It is also shown that if centrifugal compressors are to be used in a pipeline system, pressure drops will need to be restricted as even an advanced two-stage centrifugal compressor will be limited to a pressure ratio of 1.2. High strength steels are suitable for the in-plant compressor, but aluminium alloy will be required for a hydrogen pipeline compressor.

High-performance anion exchange membrane alkaline seawater electrolysis

2021 ◽  
Author(s):  
Yoo Sei Park ◽  
Jooyoung Lee ◽  
Myeong-Je Jang ◽  
Juchan Yang ◽  
Jae Hoon Jeong ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Anion Exchange Membrane ◽  
Hydrogen Energy ◽  
Highly Active ◽  
Production Of Hydrogen ◽  
Exchange Membrane ◽  
Seawater Electrolysis

Seawater electrolysis is a promising technology for the production of hydrogen energy and seawater desalination. To produce hydrogen energy through seawater electrolysis, highly active electrocatalysts for the oxygen evolution reaction...

scholarly journals A Mini Review on Doped Nickel-Based Electrocatalysts for Hydrogen Evolution Reaction

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4651
Author(s):  
Yilin Deng ◽  
Wei Lai ◽  
Bin Xu
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Water Electrolysis ◽  
Energy Resources ◽  
Alkaline Media ◽  
Hydrogen Energy ◽  
Heteroatom Doping ◽  
Highly Active ◽  
Production Of Hydrogen

The energy crisis and environmental pollution have attracted much attention and have promoted researches on clean and sustainable hydrogen energy resources. With the help of highly active and stable transition metal nickel-based catalysts, the production of hydrogen from water electrolysis from electrolyzed water has become an inexpensive and efficient strategy for generating hydrogen energy. In recent years, heteroatom doping has been found to be an effective strategy to improve the electrocatalytic hydrogen evolution reaction (HER) performances of nickel-based catalysts in acidic, neutral, and alkaline media. This review will highlight many recent works of inexpensive and readily available heteroatom-doped nickel-based HER catalysts. The evaluation methods for the performances of HER catalyst will be briefly described, and the role of heteroatom doping and its application in nickel-based catalyst will be summarized. This article will also point out some heteroatom doping strategies, which may provide references and inspire the design of other catalysts with dopants.

Progress in the production of hydrogen energy from food waste: A bibliometric analysis

2021 ◽  
Author(s):  
Adithya Sridhar ◽  
Muthamilselvi Ponnuchamy ◽  
Ponnusamy Senthil Kumar ◽  
Ashish Kapoor ◽  
Leilei Xiao
Keyword(s):  
Bibliometric Analysis ◽  
Food Waste ◽  
Hydrogen Energy ◽  
Production Of Hydrogen

Production of hydrogen energy from dilute acid-hydrolyzed palm oil mill effluent in dark fermentation using an empirical model

2016 ◽  
Vol 41 (37) ◽  
pp. 16373-16384 ◽  
Author(s):  
Nadia Farhana Azman ◽  
Peyman Abdeshahian ◽  
Najeeb Kaid Nasser Al-Shorgani ◽  
Aidil Abdul Hamid ◽  
Mohd Sahaid Kalil
Keyword(s):  
Palm Oil ◽  
Empirical Model ◽  
Dark Fermentation ◽  
Palm Oil Mill Effluent ◽  
Hydrogen Energy ◽  
Dilute Acid ◽  
Production Of Hydrogen ◽  
Palm Oil Mill

Numerical Simulation of an Axisymmetric Ethanol Reforming Reactor for Hydrogen Fuel Cell Applications

2006 ◽  
Author(s):  
Gregory A. Buck ◽  
Hiroyuki Obara
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Autothermal Reforming ◽  
Great Promise ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Gaseous State ◽  
Ethanol Reforming ◽  
Wide Range ◽  
Production Of Hydrogen

Hydrogen fuel cell technology is currently capable of providing adequate power for a wide range of stationary and mobile applications. Nonetheless, the sustainability of this technology rests upon the production of hydrogen from renewable resources. Among the techniques under current study, the chemical reforming of alcohols and other bio-hydrocarbon fuels, appears to offer great promise. In the so called autothermal reforming process, a suitable combination of total and partial oxidation supports hydrogen production from ethanol with no external addition of energy required. Furthermore, the autothermal reforming process conducted in a well insulated reactor, produces temperatures that promote additional hydrogen production through the endothermic steam reforming and the water-gas shift reactions, which may be catalyzed or uncatalyzed, with the added benefit of lowered carbon monoxide concentrations. In this study, an adiabatic ethanol reforming reactor was simulated assuming the reactants to be air (21% O2 and 79% N2) and ethanol (C2H5OH) and the products to be H2O, CO2, CO and H2, with all constituents taken to be in the gaseous state. The air was introduced uniformly through a ring around the side of the reactor and the gaseous ethanol was injected into the center of one end, with products withdrawn from the center of the opposite end, to create an axisymmetric flow field. The gas flows within the reactor were assumed to be turbulent, and the chemical kinetics of a simple four reaction system was assumed to be controlled by turbulent mixing processes. Air and fuel flow rates into the reactor were varied to obtain six different levels of oxidation (air-fuel ratios) while maintaining the same total gaseous mass flow out of the reactor. The numerical results for the reacting flow show that hydrogen production is maximized when the air-fuel ratio on a mass basis is held at approximately 2.8. These findings are in qualitative agreement with observations from previous experimental studies.

scholarly journals Towards Hydrogen Energy: Progress on Catalysts for Water Splitting

2012 ◽  
Vol 65 (6) ◽  
pp. 577 ◽  
Author(s):  
Gerhard F. Swiegers ◽  
Douglas R. MacFarlane ◽  
David L. Officer ◽  
Amy Ballantyne ◽  
Danijel Boskovic ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Water Splitting ◽  
Water Oxidation ◽  
Research Council ◽  
Hydrogen Energy ◽  
Energy Technology ◽  
Production Of Hydrogen ◽  
Centre Of Excellence ◽  
The University ◽  
Reduction Catalysts

This article reviews some of the recent work by fellows and associates of the Australian Research Council Centre of Excellence for Electromaterials Science (ACES) at Monash University and the University of Wollongong, as well as their collaborators, in the field of water oxidation and reduction catalysts. This work is focussed on the production of hydrogen for a hydrogen-based energy technology. Topics include: (1) the role and apparent relevance of the cubane-like structure of the Photosystem II Water Oxidation Complex (PSII-WOC) in non-biological homogeneous and heterogeneous water oxidation catalysts, (2) light-activated conducting polymer catalysts for both water oxidation and reduction, and (3) porphyrin-based light harvesters and catalysts.

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