Poland
Operation Analysis of Selected Domestic Appliances Supplied with Mixture of Nitrogen-Rich Natural Gas with Hydrogen
Dec 2021
Publication
This is article presents the results of the testing of the addition of a hydrogen-to-nitrogen-rich natural gas of the Lw group and its influence on the operation of selected gas-fired domestic appliances. The tests were performed on appliances used for the preparation of meals and hot water production for hygienic and heating purposes. The characteristics of the tested gas appliances are also presented. The burners and their controllers with which the tested Read More
Functional Model of Power Grid Stabilization in the Green Hydrogen Supply Chain System—Conceptual Assumptions
Dec 2022
Publication
Green hydrogen supply chain includes supply sources production and distribution of hydrogen produced from renewable energy sources (RES). It is a promising scientific and application area as it is related to the problem of instability of power grids supplied with RES. The article presents the conceptual assumptions of the research on the design of a functional multi-criteria model of the stabilization model architecture of energy distribution networ Read More
Enhanced Production of Hydrogen from Methanol Using Spark Discharge Generated in a Small Portable Reactor
Nov 2021
Publication
An efficient production of hydrogen from a mixture of methanol and water is possible in a spark discharge. In this discharge there is a synergistic effect of high-energy electrons and high temperature interactions which enables an efficient course of endothermic processes such as the production of hydrogen from methanol. The water to methanol molar ratio of 1:1 was kept constant during the study. While the discharge power and feed flow rate were Read More
Hytunnel Project to Investigate the Use of Hydrogen Vehicles in Road Tunnels
Sep 2009
Publication
Hydrogen vehicles may emerge as a leading contender to replace today’s internal combustion engine powered vehicles. A Phenomena Identification and Ranking Table exercise conducted as part of the European Network of Excellence on Hydrogen Safety (HySafe) identified the use of hydrogen vehicles in road tunnels as a topic of important concern. An internal project called HyTunnel was duly established within HySafe to review identify and analyse the i Read More
Impact of Depth on Underground Hydrogen Storage Operations in Deep Aquifers
Mar 2024
Publication
Underground hydrogen storage in geological structures is considered appropriate for storing large amounts of hydrogen. Using the geological Konary structure in the deep saline aquifers an analysis of the influence of depth on hydrogen storage was carried out. Hydrogen injection and withdrawal modeling was performed using TOUGH2 software assuming different structure depths. Changes in the relevant parameters for the operation of an undergr Read More
Hydrogen Explosion Hazards Limitation in Battery Rooms with Different Ventilation Systems
Sep 2019
Publication
When charging most types of industrial lead-acid batteries hydrogen gas is emitted. A large number of batteries especially in relatively small areas/enclosures and in the absence of an adequate ventilation system may create an explosion hazard. This paper describes full scale tests in confined space which demonstrate conditions that can occur in a battery room in the event of a ventilation system breakdown. Over the course of the tests Read More
Tests of the Vehicle’s Powertrain with Hydrogen Fuel Cells at a Low Temperature
Sep 2019
Publication
The article discusses issues related to the operation of fuel cells stack fed with hydrogen at low temperature. The test object was a Toyota Mirai passenger car equipped with this type of powertrain. Tests were carried out in a thermoclimatic chamber at the Cracow University of Technology. They had an initial character and their aim was to evaluate the work of individual subassemblies of the propulsion system including the hydrogen supply system in ter Read More
Experimental and Numerical Study on Spontaneous Ignition of Hydrogen-methane Jets in Air
Sep 2013
Publication
This paper is an investigation of the spontaneous ignition process of high-pressure hydrogen and hydrogen-methane mixtures injected into air. The experiments were conducted in a closed channel filled with air where the hydrogen or hydrogen–methane mixture depressurised through different tubes (diameters d = 6 10 and 14 mm and lengths L = 10 25 40 50 75 and 100 mm). The methane addition to the mixture was 5% and 10% vol. The res Read More
Using Hydrogen Reactors to Improve the Diesel Engine Performance
Apr 2022
Publication
This work is aimed at solving the problem of converting diesel power drives to diesel– hydrogen fuels which are more environmentally friendly and less expensive alternatives to diesel fuel. The method of increasing the energy efficiency of diesel fuels has been improved. The thermochemical essence of using methanol as an alternative fuel to increase energy efficiency based on the provisions of thermotechnics is considered. Alternative methanol fuel h Read More
Inhibition of Hydrogen-yielding Dark Fermentation by Ascomycetous Yeasts
May 2018
Publication
Hydrogen-yielding fermentation conducted in bioreactors is an alternative method of hydrogen production. However unfavourable processes can seriously inhibit bio-hydrogen generation during the acidogenic step of anaerobic digestion. Here ascomycetous yeasts were identified as a major factor inhibiting the production of bio-hydrogen by fermentation. Changes in the performance of hydrogen-producing bioreactors including metabolic shift quantitativ Read More
Production of Hydrogen and Methane from Lignocellulose Waste by Fermentation. A Review of Chemical Pretreatment for Enhancing the Efficiency of the Digestion Process
May 2020
Publication
In Poland lignocellulose wastes constitute about 43% of municipal waste (∼4 417 Gg). Anaerobic and/or dark fermentation are sustainable methods of lignocellulosic waste-management and contribute greatly to ever increasing demand for energy and products. This paper presents the results of the theoretical potential of methane and hydrogen yields from lignocellulosic wastes. Also state-of-the-art methods in the field of lignocellulose ferme Read More
Prediction of Gaseous Products from Refuse Derived Fuel Pyrolysis Using Chemical Modelling Software - Ansys Chemkin-Pro
Nov 2019
Publication
There can be observed global interest in waste pyrolysis technology due to low costs and availability of raw materials. At the same time there is a literature gap in forecasting environmental effects of thermal waste treatment installations. In the article was modelled the chemical composition of pyrolysis gas with main focus on the problem in terms of environmental hazards. Not only RDF fuel was analysed but also selected waste fractions included in its co Read More
A Multiobjective Optimization of a Catalyst Distribution in a Methane/Steam Reforming Reactor Using a Genetic Algorithm
May 2020
Publication
The presented research focuses on an optimization design of a catalyst distribution inside a small-scale methane/steam reforming reactor. A genetic algorithm was used for the multiobjective optimization which included the search for an optimum of methane conversion rate and a minimum of the difference between highest and lowest temperatures in the reactor. For the sake of computational time the maximal number of the segment with Read More
Hydrogen Production During Direct Cellulose Fermentation by Mixed Bacterial Culture: The Relationship Between the Key Process Parameters Using Response Surface Methodology
Jun 2021
Publication
Dark fermentation is a promising method to produce hydrogen from lignocellulosic biomass. This study assessed the influence of temperature phosphate buffer concentration and substrate concentration on direct hydrogen production form cellulose using response surface methodology. Mixed bacterial culture was successfully enriched on cellulose and used as an inoculum for hydrogen production. The model indicated that the highest cumulative hydrog Read More
A Comprehensive Overview of Hydrogen-Fueled Internal Combustion Engines: Achievements and Future Challenges
Oct 2021
Publication
This paper provides a comprehensive review and critical analysis of the latest research results in addition to an overview of the future challenges and opportunities regarding the use of hydrogen to power internal combustion engines (ICEs). The experiences and opinions of various international research centers on the technical possibilities of using hydrogen as a fuel in ICE are summarized. The advantages and disadvantages of the use of hydroge Read More
Electrocatalytic Properties for the Hydrogen Evolution of the Electrodeposited Ni–Mo/WC Composites
May 2021
Publication
The catalytical activity for the hydrogen evolution reaction (HER) of the electrodeposited Ni–Mo/WC composites is examined in 1 M KOH solution. The structure surface morphology and surface composition is investigated using the scanning electron microscopy X-ray diffraction and X-ray photoelectron spectroscopy. The electrocatalytic properties for the HER is evaluated based on the cathodic polarization electrochemical impedance cyclic voltam Read More
Aging Effects on Modelling and Operation of a Photovoltaic System with Hydrogen Storage
Jun 2021
Publication
In this work the aging effects on modelling and operation of a photovoltaic system with hydrogen storage in terms of energy production decrease and demand for additional hydrogen during 10 years of the system operation was analysed for the entire energy system for the first time. The analyses were performed with the support of experimental data for the renewable energy system composed of photovoltaic modules fuel cell electrolysers hydr Read More
Evaluation of Conceptual Electrolysis-based Energy Storage Systems Using Gas Expanders
Feb 2020
Publication
In this study four energy storage systems (Power-to-Gas-to-Power) were analysed that allow electrolysis products to be fully utilized immediately after they are produced. For each option the electrolysis process was supplied with electricity from a wind farm during the off-peak demand periods. In the first two variants the produced hydrogen was directed to a natural gas pipeline while the third and fourth options assumed the use of hydrogen for syntheti Read More
Sustainable Hydrogen Production by Plasmonic Thermophotocatalysis
Feb 2021
Publication
A vision of hydrogen based economy and clean sustainable fossil fuels-free world inspires the scientific community to put much effort into the development of visible-light-driven photochemistry and efficient solar energy harvesting. The unique features of plasmonic nanomaterials such as capability of significant electric field amplification an extreme local heating generation of high energy charge carriers and broad tunability of optical properties coupled to Read More
Scaling Factors for Channel Width Variations in Tree-like Flow Field Patterns for Polymer Electrolyte Membrane Fuel Cells - An Experimental Study
Apr 2021
Publication
To have a uniform distribution of reactants is an advantage to a fuel cell. We report results for such a distributor with tree-like flow field plates (FFP). Numerical simulations have shown that the width scaling parameters of tree-like patterns in FFPs used in polymer electrolyte membrane fuel cells (PEMFC) reduces the viscous dissipation in the channels. In this study experimental investigations were conducted on a 2-layer FF plate possessing a tree-li Read More
No more items...