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Synthesis and characterization of mesoporous mordenite

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Abstract.
Three methods were investigated to synthesize mesoporous mordenite. XRD, N2 physisorption, SEM, and
TEM showed that the mordenite obtained by acid leaching followed by base leaching of a conventional
mordenite is a crystalline mesoporous material with MOR framework. The higher diffusivity of toluene
indicated that mesopores benefited molecule transport through the zeolite crystal. Measurement of
the number of Brønsted acid sites by n-propylamine TPD and 27Al NMR showed that the mesoporous
mordenite had less extra-framework aluminum and a large number of Brønsted acid sites, while
the isomerization of 2-methyl-2-pentene indicated that the mesoporous mordenite possessed a higher
reactivity than conventional mordenite. The mesoporous mordenite had a much higher catalytic activity
than conventional mordenite in the alkylation of benzene with benzyl alcohol. At 353 K and under
atmospheric pressure, the conversion of benzyl alcohol over hierarchical mesoporous mordenite was 100%
in 3 h, whereas the conversion over conventional mordenite was less than 2%. Synthesis of mesoporous
mordenite with amphiphilic organosilane and carbon as secondary template did not give real mesoporous
mordenite.

Keywords:
Mesopore
Mordenite
Leaching
Alkylation
Isomerization
Diffusivity

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Informasi Detail

Judul Seri

Journal of Catalysis

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Catalysis 262 (2009) 257–265

Bahasa

English

ISBN/ISSN

00219517

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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