Catalytic conversion of glycerol to olefins over Fe, Mo, and Nb catalysts supported on zeolite ZSM-5

Dirleia S. Lima and Oscar W. Perez-Lopez

Renewable Energy, 2019, vol. 136, issue C, 828-836

Abstract: The large scale production of biodiesel has increased interest in glycerol transformation into higher value products. This study evaluated catalysts supported on HZSM-5 containing Fe, Mo, and Nb, in the glycerol conversion to olefins. The samples were prepared by wet impregnation and characterized by XRD, SBET, NH3-TPD, and TPO techniques. Catalytic experiments were performed in the range of 450–600 °C in a fixed-bed tubular reactor. The gaseous products were analyzed by online gas chromatography. It was observed that the modification in the acidic properties of ZSM-5 plays an important role in the selectivity to olefins. The highest selectivity for olefins was obtained for the Fe/ZSM-5 catalyst in the 450–500 °C range and for Nb/ZSM-5 in the range of 550–600 °C. Fe/ZSM-5 presented the highest selectivity to propylene at lower temperatures due to the higher acidic strength of the strong acid sites.

Keywords: Glycerol conversion; Light olefins; Renewable resources; Metal-loaded catalysts; ZSM-5; Acid strength (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:136:y:2019:i:c:p:828-836

DOI: 10.1016/j.renene.2019.01.051

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