scholarly journals Analysis of Liquid Organic Hydrogen Carrier Systems

2022 ◽  
Author(s):  
Emma Southall ◽  
Liliana Lukashuk
Keyword(s):  
Hydrogen Storage ◽  
Base Metal ◽  
Detailed Examination ◽  
Process Conditions ◽  
Catalytic Materials ◽  
Process Implementation ◽  
Hydrogen Carrier ◽  
Materials Used ◽  
Moderate Cost ◽  
Carrier Systems

Liquid organic hydrogen carriers (LOHCs) provide attractive opportunities for hydrogen storage and transportation. In this study, a detailed examination of the most prominent LOHCs is performed, with a focus on their properties and scope for successful process implementation, as well as catalytic materials used for the hydrogenation and dehydrogenation steps. Different properties of each potential LOHC offer significant flexibility within the technology, allowing bespoke hydrogen storage and transportation solutions to be provided. Among different LOHC systems, dibenzyltoluene/perhydro-dibenzyltoluene has been identified as one of the most promising candidates for future deployment in commercial LOHC-based hydrogen storage and transport settings, based on its physical and toxicological properties, process conditions requirements, availability and its moderate cost. PGM-based catalysts have been proven to catalyse both the hydrogenation and dehydrogenation steps for various LOHC systems, though base metal catalysts might have a potential for the technology.

Boosting the activity of hydrogen release from liquid organic hydrogen carrier systems by sulfur-additives to Pt on alumina catalysts

2019 ◽  
Vol 9 (13) ◽  
pp. 3537-3547 ◽  
Author(s):  
Franziska Auer ◽  
Dominik Blaumeiser ◽  
Tanja Bauer ◽  
Andreas Bösmann ◽  
Normen Szesni ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Product Formation ◽  
Side Product ◽  
Hydrogen Release ◽  
Hydrogen Carrier ◽  
Carrier Systems ◽  
Interesting Alternative ◽  
Alumina Catalysts

Liquid organic hydrogen carriers represent an interesting alternative for hydrogen storage and transport. We demonstrate a method to simultaneously increase the activity of LOHC dehydrogenation catalysts and reduce side product formation.

Proactive In-Situ Welding Stress Control for Laser Repair Welding of Irradiated Austenitic Materials

2017 ◽  
Author(s):  
Jian Chen ◽  
Jonathan Tatman ◽  
Zongyao Chen ◽  
Zhili Feng ◽  
Greg Frederick
Keyword(s):  
Numerical Simulations ◽  
Technology Development ◽  
Welding Process ◽  
Steel Plates ◽  
Image Correlation ◽  
Process Conditions ◽  
Welding Stress ◽  
Repair Welding ◽  
Materials Used

Substantial research has been performed in recent years to determine the effects and feasibility of welding on highly irradiated austenitic materials. This research has been driven by the need to preemptively develop welding techniques capable of repairing highly irradiated light water reactor (LWR) components susceptible to detrimental corrosion and cracking. However, the materials used to fabricate internal LWR components become increasingly difficult to weld with in-service age due to irradiation-induced generation of helium in the material matrix over time. This paper introduces a patent-pending technology that proactively manages the stresses during laser repair welding of highly irradiated reactor internals to avoid the occurrence of intergranular helium-induced cracking. The technology development relied on numerical simulations that made it possible to refine and optimize the innovative welding concept and to identify specific process conditions achieving significant reduction of tensile stress (or even formation of compressive stress) near the weld pool in the heat-affected zone on cooling. The candidate welding process conditions identified by the numerical simulations were experimentally tested on stainless steel plates (Type 304L) with a laser welding system purposely designed and engineered to incorporate the proactive stress management concept. In-situ temperature and strain measurement technique based on digital image correlation were applied to validate the numerical simulations.

Elevated Temperature Behavior of Creep and Fatigue in Welded P92 Steel

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1621-1626 ◽  
Author(s):  
Byeongsoo Lim ◽  
Bumjoon Kim ◽  
Moonhee Park ◽  
Sungjoon Won
Keyword(s):  
High Temperature ◽  
Weld Metal ◽  
Base Metal ◽  
Power Plants ◽  
Test Method ◽  
P92 Steel ◽  
Creep Properties ◽  
High Temperature Materials ◽  
Materials Used ◽  
Small Punch Creep Test

Fatigue strength and life of weldment at high temperature is very important for high temperature materials used in power plants. In this study, creep properties of weld metal, HAZ and base metal of P92 steel were evaluated by SP (small punch) creep test method. Fatigue crack growth behaviors in weld metal, HAZ and base metal of P92 steel were investigated at high temperature. Microstructure and microhardness of the weldment were also investigated for better analysis.

Evaluations of Concepts for the Integration of Fuel Cells in Liquid Organic Hydrogen Carrier Systems

2019 ◽  
Vol 33 (10) ◽  
pp. 10324-10330 ◽  
Author(s):  
Karsten Müller ◽  
Simon Thiele ◽  
Peter Wasserscheid
Keyword(s):  
Fuel Cells ◽  
Hydrogen Carrier ◽  
Carrier Systems

Influence of the nanoparticle size on hydrogen release and side product formation in liquid organic hydrogen carrier systems with supported platinum catalysts

2020 ◽  
Vol 10 (19) ◽  
pp. 6669-6678
Author(s):  
Franziska Auer ◽  
Alexander Hupfer ◽  
Andreas Bösmann ◽  
Normen Szesni ◽  
Peter Wasserscheidpeter
Keyword(s):  
Product Formation ◽  
Hydrogen Release ◽  
Nanoparticle Size ◽  
Pt Catalyst ◽  
Supported Platinum ◽  
Supported Platinum Catalysts ◽  
Hydrogen Carrier ◽  
The Mean ◽  
Carrier Systems ◽  
Supported Pt Catalyst

The performance of an alumina supported Pt catalyst in the hydrogen release from perhydro-dibenzyltoluene is strongly depending on the mean Pt nanoparticle size.

Benzyltoluene/dibenzyltoluene-based mixtures as suitable liquid organic hydrogen carrier systems for low temperature applications

2020 ◽  
Vol 45 (29) ◽  
pp. 14897-14906 ◽  
Author(s):  
H. Jorschick ◽  
M. Geißelbrecht ◽  
M. Eßl ◽  
P. Preuster ◽  
A. Bösmann ◽  
...  
Keyword(s):  
Low Temperature ◽  
Hydrogen Carrier ◽  
Carrier Systems ◽  
Temperature Applications

scholarly journals Hydrogen release from liquid organic hydrogen carriers catalysed by platinum on rutile-anatase structured titania

2020 ◽  
Vol 56 (11) ◽  
pp. 1657-1660 ◽  
Author(s):  
P. T. Aakko-Saksa ◽  
M. Vehkamäki ◽  
M. Kemell ◽  
L. Keskiväli ◽  
P. Simell ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Active Catalyst ◽  
Catalyst System ◽  
Hydrogen Release ◽  
Hydrogen Carrier

A liquid organic hydrogen carrier (LOHC) is an interesting concept for hydrogen storage. Pt supported on a rutile-anatase form of titania was found to be an active catalyst system for dehydrogenation of perhydrogenated dibenzyl toluene.

Hydrogen Storage in Nitrides by the Use of Ammonia as a Hydrogen Carrier

2010 ◽  
Vol 654-656 ◽  
pp. 2819-2822
Author(s):  
Hayao Imamura ◽  
Naotaka Shimomura ◽  
Keisuke Watanabe ◽  
Kenichi Tanaka ◽  
Fumiya Nakamura ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Hydrogen Storage ◽  
Active Carbon ◽  
Room Temperature ◽  
Ammonia Gas ◽  
Hydrogen Carrier ◽  
Magnesium Nitride

Hydrogen storage by calcium nitride or magnesium nitride has been undertaken by the use of ammonia, in which the possibility of ammonia as a vector for hydrogen carriers has been studied. When the calcium imide ornitride obtained by thermal decomposition of calcium amide dispersed on active carbon (AC) was brought into contact with ammonia gas (300 Torr) at room temperature, NH3 uptake readily occurred. When the sample after NH3 uptake was heated, the absorbed ammonia was released in the form of hydrogen and nitrogen. The ammonia is possibly absorbed in the form of the decomposed state in the imide ornitride. This type of hydrogen storage has been extensively studied and characterized.For magnesium nitride, ammonia was absorbed and desorbed without the decomposition.

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