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Caractérisation de la gazéfication de combustibles solides de récupération (CSR) en vue d'optimiser leur utilsation dans une unité de cogénération par gazogène

Abstract : Gasification is a thermochemical conversion process converting solid fuel into synthetic gas (syngas), containing H2 and CO. Sorting waste to produce SRF aims to allow a better energy recovery of waste, while satisfying environmental regulations. This study focuses on energetic and environmental performances of the air gasification of SRF (wood, tire, plastics, sewage sludge) using downdraft fixed bed reactors at pilot and industrial scale. Analytical procedures allow quantification of syngas composition as well as pollutant contents (sulfur, nitrogen, tars, heavy metals) in gasification outlet streams, considering raw wood as a reference. SRF Wood gasification performances are identical to Raw Wood. However adding 20%w of SRF Tire, Plastics or Sewage Sludge to SRF Wood leads to a decrease in H2 and CO contents, balanced by an increase in light hydrocarbons (CH4, C2), resulting in a similar syngas calorific value, ranging between 4.9 and 5.4 MJ/Nm3. Gasification performances are slightly lower with SRF mixes, ranging between 35 and 49%, while reaching 48 to 52% for Raw Wood and SRF Wood. Compared to Wood, only nitrogen containing pollutants are in higher concentrations with SRF Wood. In the case of SRF mixes, tars, sulfur and nitrogen containing pollutants are in higher concentrations. Moreover, heavy metals contents are higher in fine particles than in chars, resulting in a particular post-treatment.
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https://tel.archives-ouvertes.fr/tel-02106985
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Submitted on : Monday, May 6, 2019 - 4:24:10 PM
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  • HAL Id : tel-02106985, version 1

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Gwendal Vonk. Caractérisation de la gazéfication de combustibles solides de récupération (CSR) en vue d'optimiser leur utilsation dans une unité de cogénération par gazogène. Autre. Université Rennes 1, 2018. Français. ⟨NNT : 2018REN1S075⟩. ⟨tel-02106985⟩

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