Kinetic and structural changes during gasification of cashew nut shell char particles

Nguyen Hong Nam, Khuong Duy Anh, Vu Thi Thu Ha, Mai Thi Nga, Tsubota Toshiki, Tran Van Bay, Blin Joël, Van De Steene Laurent. 2021. Kinetic and structural changes during gasification of cashew nut shell char particles. Environmental Progress and Sustainable Energy, 40 (2):e13580, 12 p.

Quartile : Q3, Sujet : ENGINEERING, CHEMICAL / Quartile : Q3, Sujet : ENGINEERING, ENVIRONMENTAL / Quartile : Q3, Sujet : ENVIRONMENTAL SCIENCES / Quartile : Q4, Sujet : GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY (Science)

Résumé : Cashew Nut Shell (CNS), an abundant waste from the cashew nut production, could become a promising material for gasification. Nevertheless, engineering data regarding this technology is still small and fragmented. In this study, the evolution of the char textural properties during gasification, as well as the effect of operating conditions on char gasification kinetics were extensively investigated and quantified. The textural properties of cashew nut shell char changed significantly following different pathways between CO2 and H2O gasification. Micropores and mesopores were well developed along with the conversion in the case of H2O gasification instead of only micropores in the case of CO2 gasification. Regarding char gasification kinetics, an increase of the temperature from 800 to 1000°C enhanced five times the conversion rate under an H2O atmosphere and 15 times under a CO2 atmosphere. The conversion rate increased two times when the concentration of reacting gases changed from 20 to 60 vol % for both atmospheres. Similarities in terms of gasification kinetics between CNS chars and wood chip chars were found in this range of operating conditions.

Mots-clés Agrovoc : gazéification, gazéification du bois, noix de cajou, utilisation des déchets, propriété physicochimique, pyrolyse, déchet agricole

Mots-clés libres : Biomass, Cashew nut, Shell, Gasification, Kinetics, Structural evolution

Champ stratégique Cirad : CTS 7 (2019-) - Hors champs stratégiques

Auteurs et affiliations

• Nguyen Hong Nam, HUST (VNM) - auteur correspondant
• Khuong Duy Anh, USTH (VNM)
• Vu Thi Thu Ha, Vietnam Academy of Science and Technology (VNM)
• Mai Thi Nga, HUST (VNM)
• Tsubota Toshiki, Kyushu Institute of Technology (JPN)
• Tran Van Bay, University of Transport and Communications (VNM) - auteur correspondant
• Blin Joël, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0001-6715-2453
• Van De Steene Laurent, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0003-4737-3667

Source : Cirad-Agritrop (https://agritrop.cirad.fr/600112/)

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