scholarly journals Solid-State Hydrogen Storage within a Proton Battery and Its Performance Analysis with Different Catalyst Loadings

2019 ◽  
Vol 8 (9) ◽  
pp. 636-643
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Adsorption ◽  
Hydrogen Generation ◽  
Energy Content ◽  
Catalyst Loading ◽  
Ionic Form ◽  
Carbon Electrode ◽  
Potential Candidate ◽  
Desorption Process ◽  
Proton Battery

Hydrogen has already been identified as a potential candidate capable of replacing fossil fuels because of its immense energy content compared to conventional fuels. However, finding the safe, efficient generation and storage of hydrogen is a challenge. The present paper reports on hydrogen generation and its subsequent adsorption-desorption process in a proton battery with varied catalyst loading. The method of porous carbon electrode fabrication and experimentation is disclosed. The scanning electron microscopy (SEM) is employed to determine morphology characteristics of the fabricated electrodes that are integrated in a proton battery to study the process of hydrogen adsorption and desorption under the influence of varied catalytic loading. The comparison between catalytic loading of 1 mg/cm 2 and 2 mg/cm2 is analysed and reported. The hydrogen storage capacity of activated carbon electrode employed in a proton battery is obtained to be in the range of 0.4 to 0.5 wt. %. The obtained result proves the technical feasibility of a hydrogen generation and its subsequent adsorption in an ionic form within a proton battery. The obtained results contribute towards finding a sustainable alternative solution to fossil-based fuels for the global energy demand.

Hydrogen Generation Facilitates Sintering Atmospheres

2021 ◽  
Author(s):  
David Wolff
Keyword(s):  
Heat Conduction ◽  
Hydrogen Storage ◽  
Thermal Processing ◽  
Hydrogen Generation ◽  
Energy Content ◽  
High Energy ◽  
Pure Hydrogen ◽  
Post Processing ◽  
Hydrogen Supply ◽  
Processing Techniques

Abstract For annealing, brazing or sintering, furnace atmospheres help ensure that metals thermal processors obtain the results they need. Hydrogen-containing atmospheres are used to protect surfaces from oxidation, and to ensure satisfactory thermal processing results. Hydrogen-containing atmospheres make thermal processing more forgiving because the hydrogen improves heat conduction and actively cleans heated surfaces – reducing oxides and destroying surface impurities. For powder based fabrication such as P/M, MIM or binder-jet metal AM, the use of a hydrogen-containing thermal processing atmosphere ensures the highest possible density of the sintered parts without necessitating the use of post-processing techniques. Users of pure hydrogen or hydrogen-containing gas blend atmospheres often struggle with hydrogen supply options. Hydrogen storage may create compliance problems due to its flammability and high energy content. Hydrogen generation enables hydrogen use without hydrogen storage issues. Deployment of hydrogen generation can ease the addition of thermal processing atmospheres to new and existing processing facilities.

scholarly journals Chemical modification of the polymer of intrinsic microporosity PIM-1 for enhanced hydrogen storage

Adsorption ◽  
2020 ◽  
Vol 26 (7) ◽  
pp. 1083-1091
Author(s):  
Mi Tian ◽  
Sébastien Rochat ◽  
Hamish Fawcett ◽  
Andrew D. Burrows ◽  
Christopher R. Bowen ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Surface Area ◽  
Hydrogen Adsorption ◽  
Sorption Properties ◽  
Bet Surface Area ◽  
Polymer Modification ◽  
Gas Sorption ◽  
Chemically Modified ◽  
Polymer Of Intrinsic Microporosity ◽  
Intrinsic Microporosity

Abstract A detailed investigation has been carried out of the pre-polymerisation modification of the polymer of intrinsic microporosity PIM-1 by the addition of two methyl (Me) groups to its spirobisindane unit to create a new chemically modified PIM-1 analogue, termed MePIM. Our work explores the effects of this modification on the porosity of PIM-1 and hence on its gas sorption properties. MePIM was successfully synthesised using either low (338 K) or high (423 K) temperature syntheses. It was observed that introduction of methyl groups to the spirobisindane part of PIM-1 generates additional microporous spaces, which significantly increases both surface area and hydrogen storage capacity. The BET surface area (N2 at 77 K) was increased by ~ 12.5%, resulting in a ~ 25% increase of hydrogen adsorption after modification. MePIM also maintains the advantages of good processability and thermal stability. This work provides new insights on a facile polymer modification that enables enhanced gas sorption properties.

Hydrogen Generation in an Annular Micro-Reactor: an Experimental Investigation of Water Splitting Reaction Using Aluminum in Presence of Potassium Hydroxide

2018 ◽  
Vol 17 (2) ◽  
Author(s):  
Shyam P. Tekade ◽  
Diwakar Z. Shende ◽  
Kailas L. Wasewar
Keyword(s):  
Water Splitting ◽  
Potassium Hydroxide ◽  
Hydrogen Generation ◽  
Energy Content ◽  
Average Rate ◽  
High Energy ◽  
Low Flow ◽  
Flow Rates ◽  
Metal Aluminum ◽  
Micro Reactor

Abstract Hydrogen is one of the important non-conventional energy sources because of its high energy content and non-polluting nature of combustions. The water splitting reaction is one of the significant methods for hydrogen generation from non-fossil feeds. In the present paper, the hydrogen generation has been experimentally investigated with water splitting reaction using metal aluminum in presence of potassium hydroxide as an activator under flow conditions. The rate of hydrogen generation was reported in the annular micro- reactor of 1 mm annulus using various flow rates of aqueous 0.5 N KOH ranging from 1 ml/min to 10 ml/min. The complete conversion of aluminum was observed at all the flow rates of aqueous KOH. The hydrogen generation rate was observed to depend on the flow rate of liquid reactant flowing through the reactor. At 1 ml/min of 0.5 N KOH, hydrogen generates at an average rate of 3.36 ml/min which increases to 10.70 ml/min at 10 ml/min of aqueous KOH. The Shrinking Core Model was modified for predicting the controlling mechanism. The rate of hydrogen generation was observed to follow different controlling mechanisms on various time intervals at low flow rates of aqueous KOH. It was observed that chemical reaction controls the overall rate of hydrogen generation at higher flow rates of aqueous KOH.

Hydrogen storage systems based on solid-state NaBH4/CoxB composite: Influence of catalyst properties on hydrogen generation rate

2015 ◽  
Vol 245 ◽  
pp. 86-92 ◽  
Author(s):  
O.V. Netskina ◽  
A.M. Ozerova ◽  
O.V. Komova ◽  
G.V. Odegova ◽  
V.I. Simagina
Keyword(s):  
Solid State ◽  
Hydrogen Storage ◽  
Hydrogen Generation ◽  
Storage Systems ◽  
Generation Rate

Pressure Isotherms of Hydrogen Adsorption in Carbon Nanostructures

2001 ◽  
Vol 706 ◽  
Author(s):  
Xiaohong Chen ◽  
Urszula Dettlaff-Weglikowska ◽  
Miroslav Haluska ◽  
Martin Hulman ◽  
Siegmar Roth ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Hydrogen Storage ◽  
Carbon Nanostructures ◽  
Room Temperature ◽  
Storage Capacity ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Hydrogen Storage Capacity ◽  
Carbon And Graphite

AbstractThe hydrogen adsorption capacity of various carbon nanostructures including single-wall carbon nanotubes, graphitic nanofibers, activated carbon, and graphite has been measured as a function of pressure and temperature. Our results show that at room temperature and a pressure of 80 bar the hydrogen storage capacity is less than 1 wt.% for all samples. Upon cooling, the capacity of hydrogen adsorption increases with decreasing temperature and the highest value was observed to be 2.9 wt. % at 50 bar and 77 K. The correlation between hydrogen storage capacity and specific surface area is discussed.

Molecular Dynamics Simulations on Hydrogen Adsorption in Li Doped Single Walled Carbon Nanotube

2012 ◽  
Vol 550-553 ◽  
pp. 2712-2718
Author(s):  
Li Li Wang ◽  
Yong Jian Tang ◽  
Chao Yang Wang ◽  
Jian Bo Liu
Keyword(s):  
Molecular Dynamics ◽  
Hydrogen Storage ◽  
First Principles ◽  
Alkali Metals ◽  
Hydrogen Adsorption ◽  
Dynamics Simulation ◽  
Single Wall Carbon Nanotubes ◽  
Density Analysis ◽  
Dynamics Simulations ◽  
First Principles Molecular Dynamics

This work presents a first-principles molecular dynamics study of hydrogen storage in Li doped single-wall carbon nanotubes (SWCNTs). The decomposition and adsorption between Li atom and H2 molecular are studied by bonds analysis and energy evolvement of interaction process. The modify effects of Li doped SWCNTs are studied by band structure and of states density analysis, as well as the structure transformation of SWCNTs. The enhanced hydrogen storage in Li doped SWCNTs at room temperature and common pressure is studied by first principles molecular dynamics simulation. The relationship between dope position of Li atoms and hydrogen storage also studied, and finally confirm the best dope position and provide a reference for the further research of alkali metals doped CNT.

Designing of Inorganic Al12N12 Nanocluster with Fe, Co, Ni, Cu and Zn Metals for Efficient Hydrogen Storage Materials

2021 ◽  
Vol 20 (04) ◽  
pp. 359-375
Author(s):  
Muhammad Yasir Mehboob ◽  
Fakhar Hussain ◽  
Riaz Hussain ◽  
Shaukat Ali ◽  
Zobia Irshad ◽  
...  
Keyword(s):  
Transition Metals ◽  
Hydrogen Storage ◽  
Density Functional ◽  
Hydrogen Adsorption ◽  
Chemical Hardness ◽  
Hydrogen Storage Materials ◽  
Late Transition Metals ◽  
Storage Materials ◽  
Late Transition ◽  
Cu And Zn

Hydrogen is considered as one of the attractive environmentally friendly materials with zero carbon emission. Hydrogen storage is still challenging for its use in various energy applications. That’s why hydrogen gained more and more attention to become a major fuel of today’s energy consumption. Therefore, nowadays, hydrogen storage materials are under extensive research. Herein, efforts are being devoted to design efficient systems which could be used for future hydrogen storage purposes. To this end, we have employed density functional theory (DFT) to optimize the geometries of the designed inorganic Al[Formula: see text]N[Formula: see text] nanoclusters with transition metals (Fe, Co, Ni, Cu and Zn). Various positions of metal encapsulated Al[Formula: see text]N[Formula: see text] are examined for efficient hydrogen adsorption. After adsorption of H2 on late transition metals encapsulated Al[Formula: see text]N[Formula: see text] nanocluster, different geometric parameters like frontier molecular orbitals, adsorption energies and nature bonding orbitals have been performed for exploring the potential of metal encapsulated for hydrogen adsorption. Moreover, molecular electrostatic potential (MEP) analysis was also performed in order to explore the different charge separation upon H2 adsorption on metals encapsulated Al[Formula: see text]N[Formula: see text] nanoclusters. Also, global indices of reactivity like ionization potential, electron affinity, electrophilic index, chemical softness and chemical hardness were also examined by using DFT. The adsorption energy results suggested encapsulation of late transition metals in Al[Formula: see text]N[Formula: see text] nanocage efficiently enhancing the adsorption capability of Al[Formula: see text]N[Formula: see text] for hydrogen adsorption. Results of all analysis suggested that our designed systems are efficient candidates for hydrogen adsorption. Thus, we recommended a novel kind of systems for hydrogen storage materials.

Sign in / Sign up

Export Citation Format

Share Document