About
8
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Introduction
Julien Ropp currently works at the Department of Industrial Technologies (TIN), La Haute Ecole d'Ingénierie et de Gestion du Canton de Vaud. Julien does research in Mechanical Engineering, Chemical Engineering and Environmental Engineering. Their current project is 'purification of wood combustion fumes'.
Publications
Publications (8)
Biomass torrefaction had received considerable interest by large utility companies since 2005, in particular for coal substitution in power plants. Torrefied biomass has superior qualities compared to untreated biomass: lower storage and transport costs, higher energy density and process efficiency.
The paper shows that, unlike previously reported...
Today, the energy content of wood chips is determined based on metering of heat delivered by the boiler. Consequently, the wood chip supplier can only bill for the useful heat that the consumer is able to produce with his boiler. The goal of this project was to develop a system able to determine the energy content of wood chips at the time of deliv...
In order to reduce pollutant emissions, a commercial wood log stove with staged combustion was fitted with an exhaust gas after treatment device based on a metal-based oxidation catalyst coated with platinum and palladium followed by a sintered metal particle filter (both used on diesel internal combustion engines) and a regulated exhaust gas fan f...
Torrefied wood pellets are produced from torrefied chips by thermo-chemical pre-treatment of biomass at 200-320°C in the absence of oxygen during about 15-30 minutes. Overall, the torrefaction process efficiency has been reported to be 90-95% % as compared to 84% for pelletisation. Torrefaction improves the biomass: 30% higher calorific value and 5...
Torrefied wood pellets are produced from torrefied chips by thermo-chemical pre-treatment of biomass at 200-320°C in the absence of oxygen during about 15-30 minutes. Overall, the torrefaction process efficiency has been reported to be 90-95% % as compared to 84% for pelletisation. Torrefaction improves the biomass: 30% higher calorific value and 5...
Old creosote-treated sleepers are considered as a problematic waste and their use is strictly regulated. It has been shown that decontamination by a conduction thermal treatment up to 220°C under vacuum conditions and longer than 20 hours allows a significant PAHs removal from the wood tissue. After decontamination the sleepers could be re-used in...
Because of the high content of PAHs (polyphenolic aromatic hydrocarbons) in wooden railway sleepers, legislative regulations require the thermal combustion of the sleepers after removal from the track bed or permit an altemate usage only in a limited frame. Decontamination experiments were performed by means of temperature and reduced pressure in t...
Projects
Project (1)
