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.

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.

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.

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.

scholarly journals Behavior of Compacted Magnesium-Based Powders for Energy-Storage Applications

Inorganics ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 54 ◽  
Author(s):  
Daniele Mirabile Gattia ◽  
Mukesh Jangir ◽  
Indra Prabh Jain
Keyword(s):  
Energy Storage ◽  
Hydrogen Storage ◽  
Large Scale ◽  
Storage Capacity ◽  
Structural Information ◽  
Rietveld Analysis ◽  
Magnesium Hydride ◽  
Cycling Stability ◽  
Hydrogen Release ◽  
Phase Identification

Energy storage is one of the main challenges to address in the near future—in particular due to the intermittent energy produced by extensive renewable energy production plants. The use of hydrides for this type of energy storage has many positive aspects. Hydride-based systems consist of absorption and desorption reactions that are strongly exothermic and endothermic, respectively. Heat management in the design of hydrogen storage tanks is an important issue, in order to ensure high-level performance in terms of the kinetics for hydrogen release/uptake and reasonable storage capacity. When loose powder is used, material in the form of pellets should be considered in order to avoid detrimental effects including decreased cycling performance. Moreover, sustainable materials in large-scale hydrogen reactors could be recovered and reused to improve any life cycle analysis of such systems. For these reasons, magnesium hydride was used in this study, as it is particularly suitable for hydrogen storage due to its high H2 storage capacity, reversibility and the low costs. Magnesium hydride was ball-milled in presence of 5 wt % Fe as a catalyst, then compacted with an uniaxial press after the addition of expanded natural graphite (ENG). The materials underwent 45 cycles in a Sievert’s type apparatus at 310 °C and eight bar, in order to study the kinetics and cycling stability. Scanning electron microscopy was used to investigate microstructural properties and failure phenomena. Together with Rietveld analysis, X-ray diffraction was performed for phase identification and structural information. The pellets demonstrated suitable cycling stability in terms of total hydrogen storage capacity and kinetics.

Homogeneously-catalysed hydrogen release/storage using the 2-methylindole/2-methylindoline LOHC system in molten salt-organic biphasic reaction systems

2019 ◽  
Vol 55 (14) ◽  
pp. 2046-2049 ◽  
Author(s):  
Alexander Søgaard ◽  
Marlene Scheuermeyer ◽  
Andreas Bösmann ◽  
Peter Wasserscheid ◽  
Anders Riisager
Keyword(s):  
Molten Salt ◽  
Liquid Hydrogen ◽  
Hydrogen Release ◽  
Reaction Systems ◽  
Temperature Range ◽  
System P ◽  
Biphasic Reaction ◽  
Hydrogen Carrier

Hydrogenation/dehydrogenation is effectively catalyzed by a molten salt immobilized Ir-complex in a temperature range of 120 to 140 °C in a 2-methylindole/2-methylindoline Liquid Hydrogen Carrier (LOHC) system.

scholarly journals Effect of Iterative Use of Methylcyclohexane as a Hydrogen Carrier on Catalytic Activity and By-product Formation

2019 ◽  
Vol 62 (2) ◽  
pp. 67-73 ◽  
Author(s):  
Xieli CUI ◽  
Mika ISHII ◽  
Taku TSUJIMURA ◽  
Takaaki TANIGUCHI ◽  
Yasushi HASHIMOTO ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Product Formation ◽  
Hydrogen Carrier

Estimation of Cytidylyl Cyclase Activity and Monitoring of Side-product Formation by Fast-atom Bombardment Mass Spectrometry

1997 ◽  
Vol 11 (2) ◽  
pp. 189-194 ◽  
Author(s):  
Russell P. Newton ◽  
Nancy Groot ◽  
Jan van Geyschem ◽  
Penny E. Diffley ◽  
Terence J. Walton ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Product Formation ◽  
Side Product ◽  
Cyclase Activity

Processing Analysis of the Ternary LiNH2-MgH2-LiBH4 System for Hydrogen Storage

2009 ◽  
Author(s):  
Michael U. Niemann ◽  
Sesha S. Srinivasan ◽  
Ashok Kumar ◽  
Elias K. Stefanakos ◽  
D. Yogi Goswami ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Storage System ◽  
Hydrogen Release ◽  
Reaction Pathways ◽  
Molar Ratio ◽  
Stoichiometric Ratio ◽  
Particle Sizes ◽  
Hydrogen Capacity ◽  
Hydrogen Storage System ◽  
Milling Duration

The ternary LiNH2-MgH2-LiBH4 hydrogen storage system has been extensively studied by adopting various processing reaction pathways. The stoichiometric ratio of LiNH2:MgH2:LiBH4 is kept constant with a 2:1:1 molar ratio. All samples are prepared using solid-state mechano-chemical synthesis with a constant rotational speed, but with varying milling duration. All samples are intimate mixtures of Li-B-N-H and MgH2, with varying particle sizes. It is found that the samples with MgH2 particle sizes of approximately 10nm exhibit lower initial hydrogen release at a temperature of 150°C. The as-synthesized hydrides exhibit two main hydrogen release temperatures, one around 160°C and the other around 300°C. The main hydrogen release temperature is reduced from 310°C to 270°C, while hydrogen is first reversibly released at temperatures as low as 150°C with a total hydrogen capacity of 6 wt.%.

scholarly journals Hydrogen Storage in Propane-Hydrate: Theoretical and Experimental Study

2020 ◽  
Vol 10 (24) ◽  
pp. 8962
Author(s):  
Mohammad Reza Ghaani ◽  
Satoshi Takeya ◽  
Niall J. English
Keyword(s):  
Hydrogen Storage ◽  
Storage Capacity ◽  
Fixed Bed ◽  
Hydrogen Uptake ◽  
Hydrogen Release ◽  
Fixed Bed Reactor ◽  
Gas Dispersion ◽  
Fixed Bed Reactors ◽  
Non Equilibrium Molecular Dynamics ◽  
Kinetics Of

There have been studies on gas-phase promoter facilitation of H2-containing clathrates. In the present study, non-equilibrium molecular dynamics (NEMD) simulations were conducted to analyse hydrogen release and uptake from/into propane planar clathrate surfaces at 180–273 K. The kinetics of the formation of propane hydrate as the host for hydrogen as well as hydrogen uptake into this framework was investigated experimentally using a fixed-bed reactor. The experimental hydrogen storage capacity propane hydrate was found to be around 1.04 wt% in compare with the theoretical expected 1.13 wt% storage capacity of propane hydrate. As a result, we advocate some limitation of gas-dispersion (fixed-bed) reactors such as the possibility of having un-reacted water as well as limited diffusion of hydrogen in the bulk hydrate.

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