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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
With countries across the world finding pathways to counter CO2 emissions, sustainable mobility has become a critical topic for leaders, policymakers, and industries. The development of Battery Electric Vehicles (BEV’s) is seen as an important and effective way through which reliance on fossil fuels and thereby related CO2 emissions can be reduced. Statistics show that the number EV’s on the roads
Syngas produced by gasification, which contains a high hydrogen content, has significant potential. The variation in the hydrogen content and dilution combustion are effective means to improve the steady combustion of syngas and reduce NOx emissions. OH planar laser-induced fluorescence technology (OH-PLIF) was applied in the present investigation of the turbulence of a premixed flame of syngas wi
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
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
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
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
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
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
Jubeldoktorer Kjell Ove Nilsson Hedersdoktor Joel Robbins Marilynne Robinson Doktorer efter avlagda prov Sara Gehlin Johan Herbertsson Hedersdoktorer Catherine Barnard Kirsten Sandberg Doktorer efter avlagda prov Britta Sjöstedt Jubeldoktorer Åke Ahlberg (absens) Arne Brun Torsten Denneberg (absens) Berndt Ehinger Viking Falk (absens) Bengt Johansson Bertil Linder (absens) Thorvald Löfkvist Per Oh
https://www.lu.se/sites/www.lu.se/files/deltagarlista_doktorspromotionen_2016.pdf - 2026-06-15
Caldicellulosiruptor saccharolyticus is an extreme thermophilic bacterium recognized for its saccharolytic ability and superior ability to produce high yields of hydrogen. However,most studies have been made using yeast extract (YE) as a rich but expensive nutrient source. For the first time, we show that C. saccharolyticus is able to grow on defined minimal media, including essential vitamins, pr
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
Carbon dioxide could replace nitrogen gas as stripping gas for the production of H2 by the extreme thermophile, Caldicellulosiruptor saccharolyticus, provided that the pH is kept below 7.0. Above this pH, ≥77 mM sodium bicarbonate will be introduced as an extra salt burden to the culture. High concentrations of sugars and salts contribute each to the inhibition of growth and H2 production, which i
Ambient pressure X-ray photoelectron spectroscopy (APXPS) has emerged as an important technique for investigating surface and interface chemistry under realistic conditions, overcoming the limitations of conventional XPS restricted to ultrahigh vacuum. This review highlights the capabilities and scientific impact of APXPS at the MAX IV Laboratory, the world’s first fourth-generation synchrotron li
Avancerade ljuskällor | LTH, Lunds Tekniska Högskola Hoppa till huvudinnehåll Vi använder cookies och andra spårningsteknologier för att förbättra användarupplevelsen på vår webbplats, för att visa dig personligt innehåll och riktade annonser och för att analysera vår webbplatstrafik. Läs mer om cookies. Absolut nödvändiga cookies Dessa cookies är nödvändiga för att webbplatsen ska fungera och kan
https://www.lth.se/forskning/profilomraaden/avancerade-ljuskaellor/ - 2026-06-13
