Effect of simultaneous dealumination and metal incorporation of zeolite ZSM-5 on the catalytic performance in HTO process

Equilibrium and Kinetic Insights into the Comprehensive Investigation of CO2, CH4, and N2 Adsorption on Cation-Exchanged X and Y Faujasite Zeolites

“…Such enhancement has also been reported for CO 2 capture, in which Walton et al studied the performance of alkali metal cation-exchanged NaX and NaY in CO 2 adsorption, and the results revealed that Li + cation could enhance CO 2 uptake in both zeolites. Another study indicated that in alkali metal cation-exchanged zeolite X, with the increase in the cationic radius, the CO 2 /N 2 selectivity increased. − …”

The effect of Si/Al ratio of ZSM-12 zeolite on its morphology, acidity and crystal size for the catalytic performance in the HTO process

“…In the Z120 sample, were observed ZSM-12 peaks and the main peaks of the ZSM-5 zeolite structure (including five diffraction peaks at 2 θ = 7.96, 8.86, 23.08, 23.98, 24.52°). 23–25 Also, the peak related to cristobalite was identified in the structure. To determine the amount of each of the existing phases, using Rietveld refinement with MAUD software and the experimental X-ray diffraction pattern of the synthesized sample was simulated by MAUD.…”

“…According to Table 2, the increase in the ratio of Si/Al, the specific surface area, and the pore volume decrease compared to the Z80 sample, which is probably due to the change in the interaction of aluminum and silica in the zeolite structure. 23,38,39 According to these results, it can be stated that changes in the Si/Al molar ratio have a great effect on the surface and pore structure of zeolite. Additionally, the amount Si/Al ratio was measured using ICP-AES and the results are shown in Table 2.…”

“…S2,† as the increase of Si/Al, the impure phase of crystallobalite increases in the samples, and only in the sample of Si/Al = 80, the pure phase of ZSM-12 was observed. 26–28…”

Synthesis of ZSM‐5 zeolite from fly ash by one‐pot hydrothermal method for methylene blue removal

“…11,12 ZSM-5 finds extensive use in catalytic cracking, methanol-to-olefins, 13,14 methanol-toaromatics, 15,16 environmental protection, 17,18 and advanced functional materials. 19,20 In recent years, a large number of studies have been conducted on the preparation of zeolites from coal fly ash (CFA) and their application in wastewater adsorption. 21 These studies include the effect of CFA type on adsorption performance, improvement of the zeolite synthesis process, safety of zeolite products, study of the adsorption process, and treatment of zeolite after adsorption.…”