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Significance efforts are underway to improve fuel cell performance, with the Polymer Electrolyte Membrane (PEM) being an essential component of Polymer Electrolyte Fuel Cells (PEFCs). The losses within the PEM can be measured through hydrogen crossover. The temperature is a critical variable that directly affects the hydrogen crossover. In this study, the hydrogen crossover and corrected current d
Hydrogen fuel cell electric vehicle (FCEV) can achieve zero exhaust emission and zero pollution. In order to make FCEV reach a farther travel distance, greater demands are put on its pressure reducing system. In this paper, a two-step high pressure reducing system for FCEV is proposed. The system is made up of two parts, a new high multi-stage pressure reducing valve (HMSPRV) and a multi-stage muf
We have studied the diffusive mobility of hydrogen molecules confined in different size cages in clathrate hydrates. In clathrate hydrate H2 molecules are effectively stored by confinement in two different size cages of the nano-porous host structure with accessible volumes of about 0.50 and 0.67 nm diameters, respectively. For the processes of sorption and desorption of the stored hydrogen the di
The pinch-off dynamics during hydrogen bubble formation was experimentally investigated in a cross-junction microchannel. A binarization interface recognizing and key frame tracking method was established. By analyzing the breakup dynamics through spatial and time domains, the effects of interfacial tension and viscosity on hydrogen bubble pinch-off were revealed. A transitional stage between a li
Several N-N-and N-O-containing compounds were analysed for their ability to act as substrates for horseradish peroxidase and peroxidases in Mycobacterium tuberculosis extracts. Aminoguanidine, diaminoguanidine, isoniazid, hydroxylamine and hydrazine were found to be weak substrates for horseradish peroxidase in reaction I and to inhibit the reaction of horseradish peroxidase with hydrogen peroxide
Popular Abstract in English Since the first generation of the Toyota Prius was first introduced in December 1997, the number of Hybrid Electric Vehicles (HEVs) and pure Electric Vehicles (EVs) available in the market has increased substantially, and nowadays almost every car manufacturer has at least one HEV or even EV model within their range. The reason behind this trend relies on the increased Since the first generation of the Toyota Prius was introduced in December 1997, the number of Hybrid Electric Vehicles (HEVs) and pure Electric Vehicles (EVs) available in the market has increased substantially. The growing competition existent puts high demands on the electric system as well as the rest of the vehicle. As a consequence, substantial design effort is devoted to optimize both at sys
Over the past decade, the chemistry of low-valent transition metal clusters has again come to the fore, primarily as a result of the development of nanochemistry and the realization that large clusters are on the cusp of the nano-domain. This perspective focuses on these recent developments in low-valent transition metal cluster chemistry, specifically looking at cluster-nanoparticles, the use of
A two-step, un-coupled process producing hydrogen (H2) from wheat straw using Caldicellulosiruptor saccharolyticus in a ‘Continuously stirred tank reactor’ (CSTR) followed by anaerobic digestion of its effluent to produce methane (CH4) was investigated. C. saccharolyticus was able to convert wheat straw hydrolysate to hydrogen at maximum production rate of approximately 5.2 L H2/L/Day. The organic
Popular Abstract in English In our current world, the exponential growth in demand for smaller and faster devices leads to the fact that we will eventually face the problem that traditional semiconductor technologies will reach their limitation in terms of size and speed. Humanity's consciousness to tackle the global ecological issues in the next decade, will demand the substitution of all non-reuThe work presented in this thesis addresses the investigation of the electronic, magnetic, and structural properties of late transition metal complexes supported on various surfaces. The research is aimed at studying the interaction between the molecules and the support, together with the intermolecular interaction. This knowledge is essential e.g. for the development of organic molecule-based dev
Microsoft Word - energies-1307818.docx Energies 2021, 14, 4982. https://doi.org/10.3390/en14164982 www.mdpi.com/journal/energies Article The Transposition of Energy Communities into Swedish Regulations: Overview and Critique of Emerging Regulations Jenny Palm * International Institute for Industrial Environmental Economics (IIIEE), Lund University, 22100 Lund, Sweden; jenny.palm@i
https://www.iiiee.lu.se/sites/iiiee.lu.se/files/2021-08/Palm_2021_Energies_Transposition%20CEP.pdf - 2026-07-02
The integration of heat pumps in low-enthalpy district heating and cooling networks can increase the efficiency and flexibility of the network. In such systems, heat pumps are installed both locally and centrally to serve different functions. In the former case, decentralized heat pumps at each building adjust the low-network temperature to the desired supply temperature. In the latter case, a cen
The overall purpose of this thesis is to investigate the feasibility of producing electrofuels from CO2 and H2 in connection to a CHP plant equipped with carbon capture technology. This is done by investigating the production of e-methane, e-methanol and e-kerosene from captured CO2 and H2 produced from electrolysis. Each of the processes is designed and analyzed in Aspen HYSYS. From this, the ene
An improved understanding of the emerging business models for hydrogen applied in the transport sector is crucial to remove barriers for hydrogen uptake. The aim of this study is to create a characterisation of the current landscape for hydrogen road mobility in Sweden by mapping out the business model for hydrogen producers, hydrogen filling station owners and hydrogen vehicle manufacturers. This
This paper investigated methane/air flame characteristics with hydrogen addition in micro confined combustion space experimentally and computationally. The focus is on the effect of hydrogen addition on the methane/air flame stabilization, the onset of flame with repetitive extinction and ignition (FREI), and the global flame quenching in decreasing continuously combustion space. Furthermore, the
Doctoral student Contact details Email: benjamin [dot] bolling [at] fysik [dot] lu [dot] seOrganisation Particle and nuclear physics Visiting address: Professorsgatan 1, Lund Service point: 14 WebpageBenjamin Bollings profile in Lund University research portal Publications Displaying of publications. Sorted by year, then title. Filter by type AllArticleMaster's ThesisPaper in conference proceeding
https://www.particle-nuclear.lu.se/benjamin-bolling - 2026-07-01
The use of a hydrogen-sensitive palladium-metal oxide semiconductor (Pd-MOS) sensor in combination with a membrane for liquid-to-gas transfer for the detection of dissolved hydrogen was investigated. The system was evaluated with known concentrations of dissolved hydrogen in water. The lowest concentration detected with this set-up was 160 nM. The method was applied to monitoring of a laboratory-s
