Article Dans Une Revue Industrial and engineering chemistry research Année : 2022

Production of Phenolic Compounds from Catalytic Oxidation of Kraft Black Liquor in a Continuous Reactor

Résumé

Black liquor is a side stream from the pulp and paper industry containing lignin and other organic and inorganic materials. Catalytic alkaline oxidation of black liquor was carried out employing a CuO/TiO2 catalyst in a trickle-bed reactor employing mild reaction conditions (150–200 °C, 80 bar) and short contact times (4–9 min). The effects of temperature, contact time, and presence of catalyst were investigated. In our best operating conditions, i.e., 200 °C and 4 min contact time, lignin conversion was complete, and phenolic monomers were obtained (maximum total yield 6.2 wt %), including vanillin (maximum yield 3.3 wt %). Vanillin represented 53 wt % of phenolic monomers. At longer contact times, the degradation of phenolic compounds was observed. The application of a continuous trickle-bed reactor, allowing short reaction times and limiting degradation reactions, is particularly appropriate for this reaction. Vanillin productivity in this reactor is 936 g m3 h–1.

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Dates et versions

hal-03702867 , version 1 (18-07-2022)

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A. Hernández-Mañas, N. Chaussard, F. Bertaud, L. Vilcocq, P. Fongarland, et al.. Production of Phenolic Compounds from Catalytic Oxidation of Kraft Black Liquor in a Continuous Reactor. Industrial and engineering chemistry research, 2022, 61 (21), pp.7430-7437. ⟨10.1021/acs.iecr.2c00486⟩. ⟨hal-03702867⟩
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