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Transformation of dl Limonene into Aromatic Compounds Using Supported Heteropolyacid Catalysts

Abstract : The transformation of DL limonene (mixture of D- and L-form ~ 1:1) that came from the pyrolysis of scrap tires rubber was studied using four heteropolyacid catalysts (H3PW12O40, H3PMo12O40, H4SiW12O40 and H4PMo11VO40) supported on Q-10, SBA-15, MCM-41, and KIT-6. The catalyst activity was measured using a py/GC/FID under a nitrogen atmosphere. The active phase and support were characterized using various technical methods (XRD, Raman, TEM, N2 adsorption–desorption, NH3-TPD, and py-FTIR). The highest weak acidity and largest number of Lewis acid sites promoted the conversion of DL limonene. The isomerization reactions seemed to be more favored than disproportionation reactions. The p-cymene yield was favored, with a high weak acidity and high Lewis/Brønsted acid sites ratio. Moreover, the results show that the use of amorphous support with a higher pore size seems to promote the conversion of DL limonene and the production of p-cymene.
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https://hal.univ-lille.fr/hal-02945233
Contributeur : Lilloa Université de Lille <>
Soumis le : mardi 22 septembre 2020 - 10:29:50
Dernière modification le : vendredi 16 octobre 2020 - 11:22:06

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Claudia Tavera-Ruiz, Paola Gauthier-Maradei, Mickael Capron, Cyril Pirez, Olivier Gardoll, et al.. Transformation of dl Limonene into Aromatic Compounds Using Supported Heteropolyacid Catalysts. Catalysis Letters, 2019, Catalysis Letters, 149, pp.328-337. ⟨10.1007/s10562-018-2606-y⟩. ⟨hal-02945233⟩

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