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Integrating fast pyrolysis into existing biomass-based combined heat and power (CHP) plants offers an innovative opportunity for plant operators to acquire an additional heat sink and produce a renewable transport fuels feedstock. This technology is particularly interesting in Sweden, where biobased heat and power constitute an important part of the energy system. It is important to establish the
The need for integrated management of urban wastewater systems (UWS) is highly acknowledged in both research and industry. Modelling studies and practical experiences with integrated control of UWS clearly suggest the benefits of a holistic control approach. Given the success of benchmark simulation models (BSMs) in the study of control strategy options for wastewater treatment plants (WWTPs), a s
Three-dimensional direct numerical simulation with detailed chemical kinetics of lean premixed CH4/air and H-2/air flames at high Karlovitz numbers (Ka similar to 1800) is carried out. It is found that the high intensity turbulence along with differential diffusion result in a much more rapid transport of H radicals from the reaction zone to the low temperature unburned mixtures (similar to 500 K)
Directed relation graph with error propagation (DRGEP) method combined with extensive validation for 0D, 1D and 2D CFD modeling supported by sensitivity and Rate-Of-Production (ROP) analyses are implemented for comparative study of detailed and reduced kinetic mechanisms for CH 4
Popular Abstract in Swedish Potatis har varit, och är fortfarande ett viktigt baslivsmedel i svensk kosthållning. Det finns många sorter med olika egenskaper vilket bidrar till dess variationsrikedom. Potatisen är en rik källa till stärkelse, kostfibrer samt vitaminer och mineraler, t ex C-vitamin och järn. En invändning mot potatis ur nutritionell synvinkel är att stärkelsen lätt bryts ned av enzDespite decreased consumption potatoes still constitute an important staple in the Swedish diet. An objection to potatoes and potato products from a nutritional point of view is the ease by which the starch is digested and absorbed in the gastrointestinal tract. This results in unfavourably high glycaemic and insulinaemic responses (glycaemic index, GI and insulinaemic index, II, respectively). Su
In this paper, technical and economic prerequisites to attain reduced carbon dioxide (CO2) emissions through the use of biomass-based energy carriers in the transportation sector are studied. CO2 emission reduction per unit of land used for biomass production as well as costs for CO2 emission reduction are estimated when substituting rape methyl ester, biogas from lucerne, ethanol from wheat and e
Popular Abstract in English Modern society is still largely based on fossil resources. However, there are growing concerns about the security and cost of these resources, as well as climate change resulting from the combustion of fossil fuels. Biofuels represent renewable fuels with the potential to mitigate the adverse effects of fossil fuels, providing a more sustainable alternative. The transpBioethanol from sugarcane is a sustainable alternative to fossil fuels, and the increasing demand for fuel ethanol has prompted studies on the use of the lignocellulosic residues of sugarcane, namely bagasse and leaves, as new feedstock. This thesis describes various process designs and the economic feasibility of producing second generation (2G) ethanol from bagasse and leaves via the enzymatic r
Tar is an undesirable byproduct of biomass gasification, which can be removed through catalytic reforming to syngas components. Iron is a promising, abundant alternative to highly active but toxic nickel catalysts. The results observed so far in catalytic studies with iron have been mixed. In this paper, the decomposition of naphthalene, a representative model compound of tar, was studied on the c
Lattice Boltzmann method (LBM) is an alternative to conventional CFD to capture the detailed activities of the transport processes at microscale. Here LBM is used to model the hydrogen production by splitting water by incident sunlight over water covered Si-nanorods. The purpose of this study is, by a 3D microscale model, to investigate the transport and the formation of the hydrogen bubbles by el
Physics-informed learning for identification of a residential building's thermal behavior Physics-informed learning for identification of a residential building’s thermal behavior Pauline Kergus Department of Automatic Control, Lund University AI Lund Lunch Seminar December 1st, 2021 Main collaborators: Anders Rantzer, Caroline Cognot, Felix Agner, Richard Pates, NODA This work is funded by the Eu
https://www.ai.lu.se/sites/ai.lu.se/files/2021-12/AI_Lund_Lunch_Seminar_Dec_2021.pdf - 2026-07-22
Sustainable, smart communication technology Sustainable, smart communication technology Communication technology – the lifeblood of our civilisation – will become accessible to all, sustainable and smarter, thanks to nanotechnology. People’s ability to communicate, store and process large amounts of information has developed dramatically in a short time and has revolutionised our entire civilisati
https://www.nano.lu.se/sites/nano.lu.se/files/2024-08/Sustainable%20communication%20technology.pdf - 2026-07-22
Climate change, energy security and air pollution are all motivators for the further development of fuel cells. A volume of fluid approach was used to investigate the impact of dynamic contact angle boundary conditions (Kistler model), mainly at the gas diffusion layer surface but also at the channel wall, of a polymer electrolyte fuel cell gas channel. From this study, it is clear that a dynamic
The effect of burning piles of slash on a Norway spruce clear-cut in southern Sweden was followed for 3 years. The vegetation cover, soil chemistry, soil water at a depth of 30 - 40 cm and runoff water were studied. The burnt plots were without vegetation for several months after burning, while the control plots were almost totally covered by Deschampsia flexuosa and Galium saxatile. The remaining
The catalyst layer (CL) in polymer electrolyte membrane (PEM) fuel cells is one of the key components regulating the overall performance of the cell. In PEM fuel cells, there are two CLs having identical composition for hydrogen oxidation (HO) and oxygen reduction (OR) reactions. There are four phases inside the CL, namely: carbon, Pt particles, ionomer and voids. In this work, a micro-model of th
Senior lecturer Welcome to my personal webpage. Below you can find some useful links and other information. Contact details Email: johan [dot] rathsman [at] fysik [dot] lu [dot] se Phone: +46 46 222 34 95Organisation Particle and nuclear physics Room number: K343 Service point: 14 WebpageJohan Rathsmans profile in Lund University research portalOther affiliations Assistant director of studies Unde
https://www.particle-nuclear.lu.se/johan-rathsman - 2026-07-21
This paper reviews path-creation processes in road transport systems in the Nordic countries: e-mobility in Denmark, hydrogen and fuel-cell electrical vehicles in Norway, and advanced biofuels in Finland and Sweden. The study builds on the path creation literature, which seeks to explain the emergence of new technological pathways. Drawing on recent insights concerning the differences between desi
The intensities of hydrogen Lyman-α and Balmer series emission lines as a result of photoexcitation of free CH4 and NH3 molecules at the C 1s and N 1s edges have been measured. For methane, the total fluorescence yield in the visible region (300–650 nm) was also recorded. Excitation functions of the Balmer lines show relative intensity enhancement of Balmer-β emission in comparison with Balmer-α a
The European Spallation Source, ESS, is set to become the world's brightest spallation neutron source. Spallation neutron sources present unique challenges with regards to radiation shielding due to the creation of a significant number of high energy neutrons during nuclear reactions in the spallation target. These can reach up to the energy of the driving proton beam. Performing Monte Carlo s
The global aviation industry is experiencing growing pressure to decarbonize, driving significant demand for Sustainable Aviation Fuel (SAF). Second-generation feedstocks that do not directly compete with food crops, such as lipid oils from insects and lignin-derived oils, are promising sources, but their high concentrations of inorganic contaminants and oxygen make them incompatible with existing
