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Woody biomass fast pyrolysis in Entrained Flow Reactor (EFR) is studied both with experiments in a lab-scale drop tube reactor (DTR) and simulations with a 1-D model. The parameters of the study are temperature (450–600°C), woody biomass particle size (370–640µm) and gas residence time (12.6–20.6s). The most critical phenomena affecting the bio-oil yield are considered in the model: heating of the...
Biomass gasification in Entrained Flow Reactor (EFR) is both studied with experiments in a drop tube reactor and modelling with a 1-D model (GASPAR). Operating conditions are chosen thanks to results of a preliminary modelling of an industrial EFR. Influence of addition of steam (0.55g/gdb), carbon dioxide (0.87g/gdb) and oxygen (Equivalent Ratio: 0–0.61) is investigated between 800 and 1400°C with...
A model is proposed to describe soot formation and oxidation during bio-oil gasification. It is based on the description of bio-oil heating, devolatilization, reforming of gases and conversion of both char and soot solids. Detailed chemistry (159 species and 773 reactions) is used in the gas phase. Soot production is described by a single reaction based on C 2 H 2 species concentration...
Wood particle conversion in a drop tube reactor was studied between 1000°C and 1400°C, both with experiments and simulations using a comprehensive model. Particular attention was paid to the influence of steam on the gasification process, and to the wood particle size. The model included a description of the different phenomena involved in biomass conversion: pyrolysis, gas phase reactions, soot formation...
Fast pyrolysis of wood was conducted in a drop tube furnace to study the influence of temperature (1000–1200–1400°C) and particle size (0.35–0.80mm) for a particle residence time of some seconds. No effect of particle size has been observed on final pyrolysis products. At 1000°C, much more gas and tar are produced than char (yield of 96% versus 4%); hydrocarbons, including light species and tar, present...
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