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Understanding the Secondary Reactions of Flash Pyrolysis Vapors inside a Hot Gas Filtration Unit

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Dec 2017 France Publisher:American Chemical Society (ACS)Journal:Energy & Fuels, volume 31, pages 13,785-13,795 (issn: 0887-0624, eissn: 1520-5029,

Authors: Miguel Ruiz; Eric Martin; Joël Blin; Laurent Van de Steene; Francois Broust;

doi: 10.1021/acs.energyfuels.7b02923

Understanding the Secondary Reactions of Flash Pyrolysis Vapors inside a Hot Gas Filtration Unit

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Abstract

Ex situ hot gas filtration (HGF) has been shown to be a simple and robust technique to upgrade the quality of flash pyrolysis oils. In this study, the secondary reactions inside the HGF unit and their impact on product yields and the chemical composition of bio-oils were investigated in a total of 18 experiments conducted at both pilot and bench reactor scales (1 and 0.1 kg/h), with beech wood (BW) and sunflower stalks (SFS). The impact of HGF on yields was found to be dependent on the extent of secondary reactions which, in turn, were determined by three parameters: (a) HGF temperature, (b) HGF char cake thickness, and (c) AAEM content of the raw feedstock. Nevertheless, independently of the conditions used, the drop in the organic yield was less than 10 wt % with both BW and SFS feedstocks. Our results demonstrated that (1) cracking reactions mainly took place in the homogeneous gas phase and (2) dehydration, coking, and decarboxylation reactions took place in the HGF char cake, probably catalyzed by th...

Country

France

Related Organizations

Centre de Coopération Internationale en Recherche Agronomique pour le Développement
France

Keywords

K50 - Technologie des produits forestiers, Gazéification, P06 - Sources d'énergie renouvelable, Bois, Fagus, Propriété physicochimique, Carboxylyase, Carbonisation du bois, Dégradation, Pyrolyse, Rendement, Filtration, agrovoc: agrovoc:c_34000, agrovoc: agrovoc:c_28044, agrovoc: agrovoc:c_9615, agrovoc: agrovoc:c_8488, agrovoc: agrovoc:c_8421, agrovoc: agrovoc:c_2900, agrovoc: agrovoc:c_26874, agrovoc: agrovoc:c_2779, agrovoc: agrovoc:c_1521, agrovoc: agrovoc:c_2159

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	19
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Average
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 10%