Johan De Greef
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View article: Strength of sand in plane strain conditions: insights from legacy experimental data
Strength of sand in plane strain conditions: insights from legacy experimental data Open
The plane strain assumption is widely used in geotechnical engineering for boundary value problems such as retaining structures and embankments. In practice, the peak friction angle of cohesionless soils under plane strain conditions is fr…
View article: Torrefaction of spent coffee grounds for solid fuel production: A review
Torrefaction of spent coffee grounds for solid fuel production: A review Open
Lignocellulosic solid fuels derived from biomass are emerging as a promising alternative to fossil fuels. However, due to a high moisture content, low energy density, and bulky volume, biomass is less favorable in terms of transport, stora…
View article: Review of machine learning applications for predicting the quality of biomass briquettes for sustainable and low-carbon energy solutions
Review of machine learning applications for predicting the quality of biomass briquettes for sustainable and low-carbon energy solutions Open
This review discusses how Machine Learning has been applied to predict the quality of biomass briquettes produced from agricultural and municipal solid organic waste, which are crucial for advancing green and low-carbon energy solutions. T…
View article: Impact of furnace and waste layer control on HCl and SO2 in combustion gas from a grate-fired Waste-to-Energy boiler
Impact of furnace and waste layer control on HCl and SO2 in combustion gas from a grate-fired Waste-to-Energy boiler Open
View article: Swirl-induced hysteresis in a sudden expansion flow
Swirl-induced hysteresis in a sudden expansion flow Open
Swirling sudden expansion flows are complex flow fields containing several coherent structures that depend on the swirl number and can exhibit hysteresis behavior between increasing and subsequently decreasing swirl levels. While these flo…
View article: Experimental Validation of a Novel Solid-Liquid Swirling Flow Reactor for Dense Suspensions
Experimental Validation of a Novel Solid-Liquid Swirling Flow Reactor for Dense Suspensions Open
Ultrasound Imaging Velocimetry (UIV) is a maturing technique for measuring two-phase flows. It enables measurements of dense suspensions when optical methods fail. This study explores UIV’s applicability to measure the flow field in an Swi…
View article: Swirl-Induced Hysteresis in a Sudden Expansion Flow
Swirl-Induced Hysteresis in a Sudden Expansion Flow Open
View article: Research and Innovation Needs for the Waste-To-Energy Sector towards a Net-Zero Circular Economy
Research and Innovation Needs for the Waste-To-Energy Sector towards a Net-Zero Circular Economy Open
This perspective article aims to identify key research priorities to make the waste-to-energy sector compatible with the societal goals of circularity and carbon neutrality. These priorities range from fundamental research to process engin…
View article: Towards Waste-to-Energy-and-Materials Processes with Advanced Thermochemical Combustion Intelligence in the Circular Economy
Towards Waste-to-Energy-and-Materials Processes with Advanced Thermochemical Combustion Intelligence in the Circular Economy Open
Waste-to-energy processes remain essential to ensure the safe and irreversible removal of materials and substances that are (or have become) unsuitable for reuse or recycling, and hence, to keep intended cycles of materials in the circular…
View article: Experimental study of a self-excited jet precession in a sudden expansion flow
Experimental study of a self-excited jet precession in a sudden expansion flow Open
Stereoscopic Particle Image Velocimetry (S-PIV) measurements are performed to analyse the flow field in a sudden expansion with an expansion ratio of 4.9:1. The velocity profile in the inlet tube is measured using Laser Doppler Anemometry …
View article: Recycling of solar photovoltaic panels: Techno-economic assessment in waste management perspective
Recycling of solar photovoltaic panels: Techno-economic assessment in waste management perspective Open
View article: Waste-to-energy: Coupling Waste Treatment to Highly Efficient CHP
Waste-to-energy: Coupling Waste Treatment to Highly Efficient CHP Open
Municipal Solid Waste Incineration (MSWI) has become the most widespread Best Available Technology (BAT) to treat residual waste streams in a reliable and safe way. As such, MSWI has contributed to achieve the landfill diversion targets in…
View article: Effect of dedicated additives and pretreatment on lead and chloride leaching from waste-to-energy fly ash and air pollution control residues
Effect of dedicated additives and pretreatment on lead and chloride leaching from waste-to-energy fly ash and air pollution control residues Open
Most of the fly ash (FA) and air pollution control residue (APC residue) of modern waste-to-energy (WtE) plants do not meet the Waste Acceptance Criteria (WAC) for hazardous waste landfills set by the EU Council decision 2003/33/EC, primar…
View article: Chemical and mineralogical composition of ashes troughout a WTE plant: theory and practical evidence
Chemical and mineralogical composition of ashes troughout a WTE plant: theory and practical evidence Open
Corrosion of heat-exchanging components is one of the main operational problems in Waste-to-Energy plants, limiting the electrical efficiency that can be reached. Corrosion is mainly related to the devolatilization and/or deposition of chl…