Abstract
Different Al/Ni ratios of pillared montmorillonite [Al/Ni (20, 15, 10, 6, 4, 2)-PILCs] were prepared by introducing the Al/Ni cationic polymers into montmorillonite under certain conditions. The structural properties of Al/Ni-PILCs were determined by a combination of X-ray diffraction (XRD), \(\hbox {N}_{2 }\) adsorption–desorption, \(\hbox {NH}_{3}\) temperature programmed desorption (\(\hbox {NH}_{3}\)-TPD) and scanning electron microscope (SEM). Structural characterizations showed the BET surface area and the interlayer spacing of Al/Ni-PILCs decreased regularly along with the nickel content. The weak acid sites of Al/Ni-PILCs increased compared with the Na-montmorillonite, and the strong acid sites decreased. The introduction of \(\hbox {Ni}^{2+}\) can adjust the acidity–basicity of the Al/Ni-PILC to some extent. In the reactions of the low-concentration ethanol dehydration, Al-PILC exhibited the highest catalytic activity with 93% ethanol conversion and 99% ethylene selectivity at \(500 {^{\circ }}\hbox {C}\).
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Li, B., Wu, X., Li, Z. et al. Effect of Different Al/Ni Ratios on Structural and Acidity Properties of Pillared Montmorillonite. Arab J Sci Eng 42, 4439–4444 (2017). https://doi.org/10.1007/s13369-017-2558-3
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DOI: https://doi.org/10.1007/s13369-017-2558-3