Rapid synthesis of hierarchical SSZ-13 zeolite microspheres via a fluoride-assisted in situ growth route using aluminum isopropoxide as aluminum source

Abstract

Hierarchical SSZ-13 were quickly synthesized by adding a small quantity of hydrofluoric acid in the starting gel using aluminum isopropoxide as aluminum source.

Methanol‐to‐Light Olefins Reaction using Zn‐Ag Modified SSZ‐13 Catalyst

“…While, an Ag/SZ‐13 catalyst deactivate rapidly compare to the parent and Zn/SZ‐13 catalyst may be due to faster aromatization in the reaction. A similar type of conversion is reported above 350 °C reaction in MTO reaction [9,10,38] . No dimethyl ether (DME) was detected in the reactor effluent may be due to higher reaction temperature (400 °C).…”

“…Liu et al. also described a similar observation that the absence of structural alternation upon metal incorporation by addition of a small amount of Zn (0.83 to 2.92 wt.%) over SZ‐13 [10] …”

“…Liu et al also described a similar observation that the absence of structural alternation upon metal incorporation by addition of a small amount of Zn (0.83 to 2.92 wt.%) over SZ-13. [10] The textural properties of parent SZ-13, Zn/SZ-13, Ag/SZ-13 & Zn 0.6 -Ag 0.4 /SZ-13, are analyzed using N 2 physisorption technique. The N 2 adsorption-desorption isotherm of the four products is presented in supporting information, Figure S1.…”

“…To date, various zeolite base catalysts have been reported for MTO reactions including ZSM‐5, [8,9] SZ‐13/mesoporous‐microporous/modified, [10] and nano‐SSZ‐13 [11] . In the last few years, several attempts have been made to improve the light olefins (ethylene & propylene) selectivity and stability of catalysts by modification of catalysts with metals ions.…”

“…By altering the Si/Al ratios, the nature of extra-framework cations and particle size, adsorption, and catalytic properties of SZ-13 can be improved. [5][6][7] To date, various zeolite base catalysts have been reported for MTO reactions including ZSM-5, [8,9] SZ-13/mesoporousmicroporous/modified, [10] and nano-SSZ-13. [11] In the last few years, several attempts have been made to improve the light olefins (ethylene & propylene) selectivity and stability of catalysts by modification of catalysts with metals ions.…”