Converting CO<sub>2</sub> Hydrogenation Products from Paraffins to Olefins: Modification of Zeolite Surface Properties by a UIO-<i>n</i> Membrane
Qi Jiang, Dengpeng Lan, Guofeng Zhao, Haitao Xu, Xiaodi Gong, Jichang Liu, Ying Shi, Lidong Zhang, Huimin Fang, Denghui Cheng, Jianping Ge, Zhen‐Liang Xu, Jin‐Ku Liu
Abstract
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 C2–C4 olefins (80%) for the catalyst ZnZrOx/SAPO-34@UIO-66, whereas 57% C2–C4 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.