OSDA-free chabazite (CHA) zeolite synthesized in the presence of fluoride for selective methanol-to-olefins

Nasser, Galal A.; Muraza, Oki; Nishitoba, Toshiki; Malaibari, Zuhair; Al-Shammari, Talal K.; Yokoi, Toshiyuki

doi:10.1016/j.micromeso.2018.07.020

Cited by 40 publications

(24 citation statements)

References 31 publications

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“…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.

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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.

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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.

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“…In addition to distinct pore size and volume, SAPO-34 material exhibits moderate to high hydrophobicity and has high thermal and hydrothermal stability. Due to these characteristic features, SAPO-34 has been extensively used in the methanol to olefin (MTO) process [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. In recent years, SAPO-34 has been investigated for CO 2 remediation, including CO 2 capture [ 49 , 50 , 51 ], conversion [ 52 , 53 , 54 ], and separation [ 49 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of SAPO-34 Zeolite Membranes for CO2 Separation: A Review

Usman

2022

Membranes

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In the zeolite family, the silicoaluminophosphate (SAPO)-34 zeolite has a unique chemical structure, distinctive pore size, adsorption characteristics, as well as chemical and thermal stability, and recently, has attracted much research attention. Increasing global carbon dioxide (CO2) emissions pose a serious environmental threat to humans, animals, plants, and the entire environment. This mini-review summarizes the role of SAPO-34 zeolite membranes, including mixed matrix membranes (MMMs) and pure SAPO-34 membranes in CO2 separation. Specifically, this paper summarizes significant developments in SAPO-34 membranes for CO2 removal from air and natural gas. Consideration is given to a variety of successes in SAPO-34 membranes, and future ideas are described in detail to foresee how SAPO-34 could be employed to mitigate greenhouse gas emissions. We hope that this study will serve as a detailed guide to the use of SAPO-34 membranes in industrial CO2 separation.

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“…The OSDAs or templates aid the fabrication of zeolites with high and tunable Si/Al ratios. 41 Tetraethylammonium hydroxide (TEAOH) is an example of the most commonly used OSDA for the synthesis of a beta zeolite structure. As for the OSDA-free synthesis route, the downside is the inability to synthesize beta (BEA) zeolites with a high Si/Al ratio.…”

Section: Introductionmentioning

confidence: 99%