Regulation of Active ZnO Species on Si‐based Supports with Diverse Textural Properties for Efficient Propane Dehydrogenation

Abstract

Propylene is deemed as a kind of key raw materials with significant value in industrial production. Highly dispersed Zn species are served as active sites in catalyzing propane dehydrogenation reaction (PDH). More importantly, the morphology and textural properties of Si-based support exert the great influence on the formation of active Zn species. Herein, active Zn species were dispersed on macroporous commercial SiO 2 , mesoporous siliceous materials (SBA-15, MCF, DMSN, KIT-6), and microporous silicalite-1 (S-1), respectively. Characterization result indicated that the dispersed active ZnO species were prone to be formed on S-1, which could be attributed to the confinement effect of micropores in S-1 and the abundant Si-OH groups interacted with Zn 2 + species. As a result, the optimal ZnO A /S-1 catalyst exhibited superior catalytic activity (propane conversion of 40.4 %, propylene selectivity of 96.0 %, 550 °C, WHSV = 0.47 h À 1 ) during PDH process. Furthermore, the relatively considerable performance of ZnO A /S-1 catalysts could help to offer a guidance on the design of efficient and low-cost catalysts for PDH reaction.

V-Promoted Ultrasmall Pd Nanoparticles Supported on V-KIT-6 for the Enhanced Catalytic Dehydrogenation of Perhydro-N-ethylcarbazole

“…Furthermore, it has been observed that the physical adsorption peak intensity of V-KIT-6 is lower than that of KIT-6 (Figure S5). The reduction of acidic −OH on the V-KIT-6 surface may be responsible for this difference. , This result is also supported by the Raman results, which show that Si–O–V formation reduces the Si–OH signaling peak intensity (Figure a).…”

“…The reduction of acidic −OH on the V-KIT-6 surface may be responsible for this difference. 42,58 This result is also supported by the Raman results, which show that Si−O− V formation reduces the Si−OH signaling peak intensity (Figure 3a).…”

Exploration of ZnO-Doped Nitrogen-Carbon Materials Derived from Polyamide-Imide for Propane Dehydrogenation

“…Recently, Zn species have been explored as active components of dehydrogenation catalysts, in addition to their role as promoters [13][14][15][16]. Moreover, ZnO-based materials, such as ZnO loaded on silicalite-1 or doped with NbO, are usually synthesized via impregnation, ion-exchange, and the pulsed laser deposition method, which could exhibit good propane dehydrogenation performance [17][18][19]. In particular, it has been demonstrated that isolated Zn atoms or highly dispersed ZnO nanoclusters present high propene selectivity and catalytic stability in the PDH system [20].…”