Synthesis of Zeolite β from Kaolin and Its Catalytic Performance For FCC Naphtha Aromatization

Abstract

A hydrothermal synthesis method for β zeolite preparation using kaolin as the sole alumina source was investigated. This approach provided a choice to manufacture zeolite β with a low cost alumina source. The zeolite β samples were characterized by XRD, IR, SEM, XRF, DSC, and BET surface area measurements. Tunable crystallinity, higher meso-or macroporosity, higher thermal stability, and more Bro ¨nsted type acid sites of zeolite β can be obtained by properly controlling the synthesis conditions using this system. The catalytic evaluation results indicated that zinc-loaded zeolite β is a good potential FCC naphtha aromatization catalyst. The kaolin derived, 2 wt% zinc-loaded Zn-β(2) showed higher aromatic yields and better product distribution compared with that of the reference Zn-β catalyst; it also provided an aromatics yield of 42.26 wt%, which increased by 22.62 wt% compared with the feedstock.

Biodiesel production by esterification of oleic acid over zeolite Y prepared from kaolin

“…Kaolin clay is a cheap and plentiful raw material found in numerous geographical locations and has been used successfully in the synthesis of mesoporous aluminosilicates [12] and various microporous zeolite frameworks; ZSM-5, X/Y, β, and A [13][14][15][16][17][18][19][20][21][22]. A large part of these studies was the removal of impurities in the clays (typically quartz) via the thermal transformation of the untreated clay into metakaolin, which is itself catalytically active in the transesterification of waste cooking oil to alkyl esters [23].…”

ZnO-beta zeolite: as an effective and reusable heterogeneous catalyst for the one-pot synthesis of polyhydroquinolines

“…X-ray diffraction (XRD) analysis Figure 1 depicts the X-ray diffraction (XRD) pattern of H-beta and ZnO-beta zeolite. The powder XRD pattern is the typical type for beta zeolite by comparing it with the reference beta zeolite (40). It was observed that, there is no visible difference between synthetic beta zeolite and zinc-modified beta zeolite.…”

ZnO-Beta Zeolite Catalyzed Solvent-Free Synthesis of Polyhydroquinoline Derivatives Under Microwave Irradiation

“…1) showed typical diffraction peaks of beta zeolite (2θ = 7.8 • and 22.3 • ) when compared with a reference spectrum [42]. The peaks of ZnO-beta zeolite were lower in intensity than the peaks of H-beta zeolite.…”