A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Zhang, Jianguang; Li, Xiangping; Liu, Juping; Wang, Chuanbin

doi:10.3390/catal9010013

Cited by 29 publications

(17 citation statements)

References 48 publications

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“…All the key bands of NaY zeolite [13] were observed in both NaY-1 and NaY-2, which slightly differed from that of NaY-S. The peaks at wavenumbers 3700-3200 cm −1 indicate the silanol groups in NaY-1 and NaY-2 [14]. Water molecules (H 2 O) were adsorbed on NaY-1 and NaY-2 surfaces, based on the appearance of peak at 1630 cm −1 which was assigned to the bending vibration of water molecules [15].…”

Section: Resultsmentioning

confidence: 91%

“…Water molecules (H 2 O) were adsorbed on NaY-1 and NaY-2 surfaces, based on the appearance of peak at 1630 cm −1 which was assigned to the bending vibration of water molecules [15]. Key bands of NaY zeolite at 1250-1000 and 850-550 cm −1 denote the asymmetrical and symmetrical stretching of SiO/AlO, respectively [14]. The peak at 500-600 cm −1 was attributed to the double six-member June 2020  Vol.…”

Section: Resultsmentioning

confidence: 99%

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Natural Aluminosilicate-based Y Zeolite for Catalytic Cracking of n-Hexadecane

2020

Makara J. Sci.

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Natural zeolite and kaolin are abundant in Indonesia especially in Java and Belitung islands. These materials generally contain high aluminosilicate minerals that can be used as silica and alumina sources for the formation of NaY zeolite. This research aimed to identify the modification of NaY zeolite structure using Bayat natural zeolite as alumina source and Belitung kaolin as silica source and its catalytic activity for n-hexadecane cracking. Pretreatment of materials were performed in several steps: activation, purification, fragmentation for Bayat-Klaten natural zeolite, and silica extraction for Belitung kaolin. The synthesis of NaY was performed hydrothermally using seed-assisted method with crystallization times of 24 and 48 h. The surface area analysis showed a typical surface area of microporous zeolite (i.e., a pore diameter of 1.897 nm) and surface area of 309.4 cm 2 /g. Meanwhile, powder X-ray diffraction characterization showed that the as-synthesized materials have the structure of NaY zeolite. The optimum crystallization time was 24 h with Si/Al ratio of 4.10. Furthermore, both synthetic and natural sourced NaY zeolites were converted into HY zeolites and employed as cracking catalyst of n-hexadecane in a fixed-bed reactor at 500°C for 75 s. The natural sourced HY resulted in 59.80% conversion and 59.80% yield of gasoline product (C 9-C 12). These values were lower than the results given by synthetic HY (80%).

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Natural Aluminosilicate-based Y Zeolite for Catalytic Cracking of n-Hexadecane

2020

Makara J. Sci.

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“…[157][158][159][160] Besides, their high thermal and chemical resistance and strong hydrophobicity due to the high Si/Al ratio and low content of charge-compensating cations in the ZSM-5 structure make them an interesting choice for researchers. 161,162 Adsorption properties of zeolites and their molecular-sized pores determine how molecules permeate through them. 126 Experiments have revealed that separation based on shape selectivity only occurs in high-silica zeolite types such as Al-free silicalite-1 (shape-selective MFI structure).…”

Section: Zeolites In Pressure-driven Membrane Technologymentioning

confidence: 99%

A review of zeolite materials used in membranes for water purification: history, applications, challenges and future trends

Far

Bruggen

Verliefde

et al. 2021

J of Chemical Tech & Biotech

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This review provides a fundamental assessment of the potential of zeolite particles incorporated into polymeric membranes in view of improving the performance of these membranes. Zeolites are of interest as having extensive potential in separation processes due to their unique frameworks and properties. Significant investigations have been carried out to improve conventional membrane properties by the inclusion of zeolites. Zeolite membranes can be classified into three categories: (i) selfsupported zeolite membranes, (ii) inorganic-supported zeolite membranes and (iii) zeolites mixed into a polymeric membrane matrix or top layer. The focus of this review is on nanosized zeolite particles incorporated into the polymeric structure of membranes, with specific attention to a polyamide layer used in pressure-driven membrane processes such as reverse osmosis. The incorporation of inorganic zeolite particles in the polymer matrix enhances the permeability without decreasing the selectivity, and increases the mechanical strength in a harsh environment and fouling and chlorine resistance of the membranes. Agglomeration of nanosized zeolites and defect formation are highlighted as the main obstacles to the fabrication of large-scale highperformance zeolite membranes in order to identify strategies to solve these issues. Among the different strategies, adding a crosslinking agent to the interfacial polymerization process might be a promising method for fabricating homogeneous zeolite-polymer composite membranes with excellent performance. This paper provides a better understanding of the knowledge acquired in the development of polymer-based zeolite nanocomposite membranes and gives perspectives for future research.

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“…Scanning electron microscopy (SEM) characterization provided morphology information of the hierarchical ZSM-5 zeolite. Figure 3 clearly shows that the as-synthesized ZSM-5 zeolite had hexagonal structure and a coffin-like shape [25]. ZSM-5 zeolite synthesized using TPAOH template to form MFI framework has coffin-like morphology and has hexagonal crystal geometry [7].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Levulinic Acid Production from Delignified Rice Husk Waste over Manganese Catalysts: Heterogeneous Versus Homogeneous

2020

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Delignified rice husk waste (25.66% (wt) cellulose) was converted to levulinic acid using three types of manganese catalysts, i.e., the Mn3O4/hierarchical ZSM-5 zeolite and Mn3O4 heterogenous catalysts, as well as Mn(II) ion homogeneous counterpart. The hierarchical ZSM-5 zeolite was prepared using the double template method and modified with Mn3O4 through wet-impregnation method. The structure and physicochemical properties of the catalyst materials were determined using several solid-state characterization techniques. The reaction was conducted in a 200 mL-three neck-round bottom flask at 100 °C and 130 °C for a certain reaction time in the presence of 10% (v/v) phosphoric acid and 2% (v/v) H2O2 aqueous solution, and the product was analyzed using HPLC. In general, 5-hydroxymethyl furfural (5-HMF) as the intermediate product was produced after 2 h and decreased after 4 h reaction time. To conclude, the Mn3O4/hierarchical ZSM-5 heterogenous catalyst gave the highest yield (wt %) of levulinic acid (39.75% and 27.60%, respectively) as the main product, after 8 h reaction time.

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A Comparative Study of MFI Zeolite Derived from Different Silica Sources: Synthesis, Characterization and Catalytic Performance

Cited by 29 publications

References 48 publications

Natural Aluminosilicate-based Y Zeolite for Catalytic Cracking of n-Hexadecane

Natural Aluminosilicate-based Y Zeolite for Catalytic Cracking of n-Hexadecane

A review of zeolite materials used in membranes for water purification: history, applications, challenges and future trends

Levulinic Acid Production from Delignified Rice Husk Waste over Manganese Catalysts: Heterogeneous Versus Homogeneous

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