Converting CO2 Hydrogenation Products from Paraffins to Olefins: Modification of Zeolite Surface Properties by a UIO-n Membrane

摘要

In the industry, designing synergetic functional nanocatalysts is a desirable strategy to achieve both high activity and selectivity for CO2 hydrogenation. Herein, we fabricate the bicomponent tandem catalysts ZnZrOx/SAPO-34@UIO-n (n = 66, 66-NH2, and 67) to catalyze CO2 conversion into light olefins. Monodispersed SAPO-34 zeolites are used as the core for the growth of the UIO-n shell to obtain its membrane-encapsulated nanocrystal, SAPO-34@UIO-n, which is mixed by grinding with ZnZrOx to obtain the ZnZrOx/SAPO-34@UIO-n catalyst. CO2 hydrogenation yielded highly selective C-2-C-4 olefins (80%) for the catalyst ZnZrOx/SAPO-34@UIO-66, whereas 57% C-2-C-4 paraffins were obtained for the catalyst ZnZrOx/SAPO-34 without a UIO-n membrane. The stable UIO-n membrane in the bifunctional catalyst ZnZrOx /SAPO-34@UIO-n adjusted the conversion of CO2 hydrogenation products from paraffins to olefins.

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