Zeolite syntheses using diamines: evidence for in situ directing agent modification

Vartuli, J.C.; Kennedy, Gordon J.; Yoon, Bohak; Malek, Andrzej

doi:10.1016/s1387-1811(00)00144-x

Cited by 23 publications

(20 citation statements)

References 9 publications

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“…The position and the intensity of the diffraction peaks of the samples are identical to those reported in the literature [23][24][25]. Textual properties of all the catalysts samples after calcinations are given in table 1.…”

Section: Crystalline Structure and Textual Properties Of The Catalystssupporting

confidence: 71%

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Chloromethane Conversion to Higher Hydrocarbons over Zeolites and SAPOs

Zhang

Wei

et al. 2006

Catal Lett

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Chloromethane transformations were carried out over zeolites and SAPOs and the conversion and product distribution differed from the porous structure and acidity of the catalysts. Chloromethane was mainly transferred to higher hydrocarbons in gasoline range over most of zeolite catalysts, while SAPOs molecular sieves, SAPO-34 and SAPO-5, showed high selectivity for light olefins production, such as ethylene, propylene and butenes. TG analysis was used to study the coke formation during the transformation and the acid difference of the catalysts was evidenced by Temperature programmed desorption of ammonia. HZSM-5, with high activity and less coke formation, was proved to be a potential catalyst for hydrocarbons production from chloromethane conversion. It is of particular interest that SAPO-34 gave an excellent performance in light olefins production from chloromethane transformation, which may be attributed to the shape selectivity and medium strong acidity of SAPO-34.

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Section: Crystalline Structure and Textual Properties Of The Catalystssupporting

confidence: 71%

“…ZSM-34 zeolite was synthesized by a hydrothermal method as described in the literature [23] All the zeolite or SAPOs catalysts were evaluated in their protonic form. Ammonium from zeolites were prepared with ion-exchanged method with solution of ammonium nitrate.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Chloromethane Conversion to Higher Hydrocarbons over Zeolites and SAPOs

Zhang

Wei

et al. 2006

Catal Lett

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“…4 902 406) filed for the synthesis of this zeolite reports the inclusion of impurities. 2,3,[11][12][13][14][15][16][17] The synthesis of zeolites is usually carried out under hydrothermal conditions. For ZSM-22, high-speed mixing of the synthesis gel during the hydrothermal synthesis process is required in order to prevent cocrystallization of commonly incurred impurities of ZSM-5 and cristobalite.…”

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confidence: 99%

Hydrothermal synthesis of pure ZSM-22 under mild conditions

2007

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“…This material was previously synthesized with organic structure directing agents, as choline [204] or different diamines [205]. The structure of ZSM-34 material is formed by an intergrowth of offretite and erionite, and interestingly, is used as efficient catalyst for the methanol to olefins reaction [206].…”

Section: Direct Synthesis Of Osda-free Zeolitesmentioning

confidence: 99%

Direct Synthesis of Functional Zeolitic Materials

Moliner

2012

ISRN Materials Science

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Recently, the direct synthesis of zeolitic materials has received much attention because several well-defined functionalities have been introduced in those materials by "one-pot" methodologies. The rationalization of the physics and chemistry of the processes involved in the zeolite growth has allowed the direct preparation of different functional molecular sieves with unique properties and potential applicability in industry. In the present paper, the "one-pot" preparations of metal-containing zeolites (both in framework and extra-framework positions), hybrid organic-inorganic molecular sieves, hierarchical microporous mesoporous zeotypes, nanosheets, nanozeolites, or template-free molecular sieves are intensively evaluated.

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Zeolite syntheses using diamines: evidence for in situ directing agent modification

Cited by 23 publications

References 9 publications

Chloromethane Conversion to Higher Hydrocarbons over Zeolites and SAPOs

Chloromethane Conversion to Higher Hydrocarbons over Zeolites and SAPOs

Hydrothermal synthesis of pure ZSM-22 under mild conditions

Direct Synthesis of Functional Zeolitic Materials

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