Microwave-assisted hydrothermal synthesis of mordenite zeolite: Optimization of synthesis parameters

Khalil, Umer; Muraza, Oki

doi:10.1016/j.micromeso.2016.06.016

Cited by 34 publications

(16 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The TGA plots in Figure showed that MOR/MIL‐101 composite became more thermally stable compared with the isolated MIL‐101(Cr). This enhancement can be attributed to the incorporation of the MOR, which is a crystalline aluminosilicate material with high thermal stability and only starts to decompose at relatively higher temperatures . Based on SEM and TEM images, MOR/MIL‐101SIB composite consists of a strong interaction between MIL‐101 and MOR zeolite, and this interaction was visible in SEM images.…”

Section: Resultsmentioning

confidence: 99%

“…This enhancement can be attributed to the incorporation of the MOR, which is a crystalline aluminosilicate material with high thermal stability and only starts to decompose at relatively higher temperatures. [22] Based on SEM and TEM images, MOR/MIL-101SIB composite consists of a strong interaction between MIL-101 and MOR zeolite, and this interaction was visible in SEM images. On the one hand, one of the disadvantages of mesoporous materials such as MIL-101 MOF is low thermal stability, [23] then, MIL-101 MOF as a mesoporous material with inner cages diameters of 29 Å and 34 Å has lower thermal stability than MOR zeolite.…”

Section: Characterization Of Compositementioning

confidence: 99%

“…MOR has special importance over other 12‐membered ring zeolites because of its one‐dimensional pore structure and high activity. These properties make MOR important in many industrial applications . MIL‐101(Cr) is a three‐dimensional chromium terephthalate‐based porous material with the empirical formula [Cr 3 (O)‐X (bdc) 3 (H 2 O) 2 ] (bdc = benzene‐1,4‐dicarboxylate, X = OH or F).…”

Section: Introductionmentioning

confidence: 99%

“…These properties make MOR important in many industrial applications. [22] MIL-101(Cr) [2] is a threedimensional chromium terephthalate-based porous material with the empirical formula [Cr 3 (O)-X (bdc) 3 (H 2 O) 2 ] (bdc = benzene-1,4-dicarboxylate, X = OH or F). MIL-101(Cr) has two types of inner cages with diameters of 29 Å and 34 Å, and pore aperture window diameters of up to 16 Å with a high surface area [Brunauer-Emmett-Teller (BET) surface area of 4000 m 2 g −1 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis of chromene derivatives in the presence of mordenite zeolite/MIL‐101 (Cr) metal–organic framework composite as catalyst

Fallah

Sohrabnezhad

Abedini

2019

Applied Organom Chemis

View full text Add to dashboard Cite

In the present study, the synthesis of mordenite zeolite/MIL‐101(Cr) metal–organic framework (MOF) composite [MOR/MIL‐101(Cr)] using the ship in a bottle method was suggested. The properties of prepared composite and individual MOF and MOR zeolite were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption–desorption measurement, and thermogravimetric analysis (TGA). The XRD results indicated diffraction peaks for each compound (MOR and MOF) in composite. The SEM and TEM images showed the formation of plates MOR (with size of 2.5 × 3 μm) along with spherical particles MIL‐101. The Brunauer–Emmett–Teller results showed that the surface area of the composite was smaller than individual MOF and MOR zeolite. Based on TGA plots, the hybrid zeolite/MOF composite was more thermally stable compared with the isolated MIL‐101(Cr). The composite was functionalized by post‐synthetic modification to obtain acid–base bifunctionality (H‐MOR/MIL‐101‐ED) for the synthesis of chromene derivatives. The acidity from framework Al‐O(H)‐Si sites in MOR and basicity from amine groups in MIL‐101 were obtained by post‐synthetic modification.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Compositementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of chromene derivatives in the presence of mordenite zeolite/MIL‐101 (Cr) metal–organic framework composite as catalyst

Fallah

Sohrabnezhad

Abedini

2019

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…The manufacturing of zeolites is indeed possible by using organic-structure directing agent (OSDA) free synthesis. The absence of template or OSDA (Khalil and Muraza, 2016; Idris et al, 2019; Nasser et al, 2019) will suppress the catalyst cost as one of the variable costs in glycerol biorefinery. Pure MOR, for instance, was fabricated by using OSDA or without OSDA route.…”

Section: Perspective On Glycerol Over Hierarchical Zeolites In the Prmentioning

confidence: 99%

Peculiarities of Glycerol Conversion to Chemicals Over Zeolite-Based Catalysts

Muraza

2019

Front. Chem.

Self Cite

View full text Add to dashboard Cite

Many countries have opted to produce biodiesel from vegetable oils for energy security and climate change concerns. Consequently, the availability of abundant glycerol, as a by-product in biodiesel production, is more obvious. Many institutions and companies have explored different routes to convert glycerol to highly-added chemical products and fuel additives. As the addition of the second reactant to glycerol may end up with worse exergy calculation, the conversion of glycerol over solid acid catalysts without the addition of the second reactant is preferred in this mini-review. Glycerol aromatization and glycerol dehydration over zeolite catalysts were focused with an emphasis on recent papers in the past 3 years. The role of acidity, hydrophilicity-hydrophobicity, zeolite frameworks are highlighted. The presence of water in the glycerol feed affected the stability of the catalysts. Low cost and naturally abundant zeolite and minerals are proposed. Numerous low-cost catalysts such as natural zeolites and natural clays are potentially used for this purpose.

show abstract

Hot Spot‐Dependent Zeolitization of NaY Precursor Gel with High Dissipation Factor in Microwave Heating

Alimoradi

Behin

2023

Chem Eng & Technol

View full text Add to dashboard Cite

The thermal effect of microwave heating was investigated in a NaY aged precursor gel with high dissipation factor. The influence of power, position, and geometry of the cylindrical vessel was evaluated on hot spots and zeolite formation in a microwave oven. Higher powers and hot spots at higher temperatures led to more thermal heterogeneity and faster zeolite formation near the wall. The highest temperature gradient was achieved in the vessel which was placed off‐center on a turntable with the farthest distance from the center, and the zeolite formation occurred faster when it was in the center. The highest temperature gradient does not guarantee faster zeolite formation and higher crystallinity, while the nonthermal effects were significant and led to zeolite formation in the center of the gel at low temperatures.

show abstract

Microwave-assisted hydrothermal synthesis of mordenite zeolite: Optimization of synthesis parameters

Cited by 34 publications

References 24 publications

Synthesis of chromene derivatives in the presence of mordenite zeolite/MIL‐101 (Cr) metal–organic framework composite as catalyst

Synthesis of chromene derivatives in the presence of mordenite zeolite/MIL‐101 (Cr) metal–organic framework composite as catalyst

Peculiarities of Glycerol Conversion to Chemicals Over Zeolite-Based Catalysts

Hot Spot‐Dependent Zeolitization of NaY Precursor Gel with High Dissipation Factor in Microwave Heating

Contact Info

Product

Resources

About