Molybdenum hybrid – Nanocrystals supported on modified Laponite composite as superior catalyst for vapour phase hydrodeoxygenation of clove oil. (April 2020)

• Record Type: Journal Article
• Authors: Krishnan, P. Santhana; Tamizhdurai, P.; Theres, G. Sonia; Shanthi, K.
• Is Part Of: Renewable energy. Volume 148(2020)
• Page Start: 451
• Page End: 466
• Publication Date: 2020-04
• Subjects: Laponite composite -- HNC-Mo -- Eugenol -- HDO -- Synergetic factor; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2019.10.052
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: Valorisation of bio-oil to sustainable energy through hydrodeoxygenation process has been attracted much attention in the development of bio-refineries. The present work emphasizes on the development of a highly active heterogeneous catalyst for hydrodeoxygenation reaction with modified Laponite-γ-alumina and SBA-15 – γ-alumina composites as support for Mo and NiMo catalysts using Mo–inorganic–organic hybrid nanocrystals (HNCs) prepared under hydrothermal condition. The synthesized catalysts were characterised using N2 –physisorption, XRD, FT–IR, Raman, HRTEM, TPD/TPR, H2 pulse chemisorption and XPS techniques. The catalysts were evaluated for HDO of eugenol (Lignin model compound, Clove oil) at 400 °C under atmospheric pressure. The physicochemical characterization of the support composites revealed that Mo-HNC supported on modified Laponite exhibited extraordinary stability, metal-support interaction and metal dispersion over the support. The catalytic activity results revealed that the Laponite composite supported NiMo-HNC catalyst performed complete conversion of eugenol with enhanced % selectivity to 3- and 4-propyl phenol (mono-deoxygenated products) and to benzene and 4-propyl cyclohexene (complete deoxygenated products). Thereby, a new Mo-HNC supported modified Laponite composite catalyst has been successfully developed. The role of the HNC-Mo preparation method, textural properties, morphology of Laponite composite catalysts have been demonstrated for efficient HDO of clove oil. Graphical abstract: Image 1 Highlights: High surface area modified Laponite synthesized by facile method at RT. Laponite & SBA-15 + alumina composites prepared by simple wet impregnation method. HNC-Mo synthesized on alumina & composites by hydrothermal method at 120 °C. Vapour phase HDO of clove oil on the catalysts were investigated at 573–673 K. High HDO rate and synergetic effect was observed on Laponite supported catalyst.