One-pot synthesis of novel hierarchical bifunctional Ga/HZSM-5 nanosheets for propane aromatization

Abstract

Hierarchical galloaluminosilicate nanosheets with the MFI structure have been successfully prepared by a one-pot hydrothermal process.

Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

“…Hierarchical silicalite-1 nanosheets (Si-MFI-NS) and conventional silicalite-1 (Si-MFI-CON) were synthesized by using tetra-(n-butyl)phosphonium hydroxide (TBPOH) and tetrapropylammonium hydroxide (TPAOH) as structure directing agents (SDAs), respectively. The hierarchical silicalite-1 nanosheets were crystallized from a gel precursor in the absence of aluminum source by following the modified literature procedures [53]. The molar composition of the precursor was 60SiO 2 18TBPOH: 0.75NaOH: 240EtOH: 600H 2 O.…”

Nanoceria-modified platinum supported on hierarchical zeolites for selective alcohol oxidation

“…Synthesis of hierarchical silicalite-1 zeolite (Silicalite1-HIE). 32 The hierarchical silicalite-1 zeolite was synthesized with the molar composition of 60SiO 2 -: 18TBPOH : 0.75NaOH : 600H 2 O. Aer mixing TEOS (8.67 g) and TBPOH (8.62 g) as a silica-SDA solution, the sodium hydroxide (0.02 g) mixed with DI-water was slowly added into silica-SDA solution, and it was then stirred at room temperature for 12 h. Aer the aging process, the synthesis gel was transferred to the Teon-lined hydrothermal synthesis reactor and heated to 130 C for 2 days. Aer that, the prepared sample was washed with DI-water, ltered and dried at 110 C. Finally, the Silicalite1-HIE zeolite was calcined at 650 C for 8 h to remove SDA.…”

“…Synthesis of hierarchical ZSM-5 zeolite (ZSM5-HIE). 32 The hierarchical ZSM-5 zeolite with different Si/Al ratios (100 and 400) were synthesized with the molar composition of 60SiO 2 : xAl 2 O 3 : 18TBPOH : 0.75NaOH : 600H 2 O, where x was 0.075 and 0.3. Firstly, TEOS, aluminium isopropoxide were mixed as a silica-alumina solution.…”

A strategy to convert propane to aromatics (BTX) using TiNp4 grafted at the periphery of ZSM-5 by surface organometallic chemistry

“…This process is also used industrially to upgrade light alkanes such as ethane, propane and butane in the petroleum refinery. [6][7][8][9] ZSM-5 is known to be one of the best catalysts for the aromatization reaction mostly due to its controllable acidity, its high-temperature stability and its shape selectivity due to its pore structure. Most of the reported studies indicate that the yield of aromatics can be increased mainly by using a doping metal.…”