A compact ZSM-5 membrane prepared without structure-directing agent

G. Li, E. Kikuchi, Masahiko Matsukata

    Research output: Contribution to journalArticle

    Abstract

    Compact ZSM-5 zeolite membranes have been prepared on the outer surface of a porous α-alumina tube without structure-directing agents (SDAs) by the seed-assisted crystallization method. An SDA-free gel and an SDA-free clear solution were used for the membrane preparation, respectively. ZSM-5 membranes prepared from the SDA-free gel showed the H2/i-C4H 10 ideal selectivity of 13.8 at 200°C, but it decreased to be 2.1 after the pretreatment at 300°C, indicating the limited thermal stability of this kind of ZSM-5 membrane. On the other hand, ZSM-5 membranes prepared from the SDA-free clear solution showed high thermal stability and good separation properties. After the pretreatment at 400°C, the H2/i-C 4H10 ideal selectivity was as high as 61 at 270°C. The maximum of the n/i-C4H10 ideal selectivity was 36 at 300°C and the separation factor was as high as 12.7 at 400°C for a 50/50 n/i-C4H10 mixture.

    Original languageEnglish
    Pages (from-to)620-625
    Number of pages6
    JournalStudies in Surface Science and Catalysis
    Volume154 A
    Publication statusPublished - 2004

    Fingerprint

    membranes
    Membranes
    selectivity
    pretreatment
    Thermodynamic stability
    thermal stability
    Gels
    gels
    Aluminum Oxide
    Crystallization
    Seed
    seeds
    Alumina
    aluminum oxides
    crystallization
    tubes
    preparation

    Keywords

    • Gas separation
    • High temperature
    • SDA-free
    • Zeolite membrane
    • ZSM-5

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Catalysis

    Cite this

    A compact ZSM-5 membrane prepared without structure-directing agent. / Li, G.; Kikuchi, E.; Matsukata, Masahiko.

    In: Studies in Surface Science and Catalysis, Vol. 154 A, 2004, p. 620-625.

    Research output: Contribution to journalArticle

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    abstract = "Compact ZSM-5 zeolite membranes have been prepared on the outer surface of a porous α-alumina tube without structure-directing agents (SDAs) by the seed-assisted crystallization method. An SDA-free gel and an SDA-free clear solution were used for the membrane preparation, respectively. ZSM-5 membranes prepared from the SDA-free gel showed the H2/i-C4H 10 ideal selectivity of 13.8 at 200°C, but it decreased to be 2.1 after the pretreatment at 300°C, indicating the limited thermal stability of this kind of ZSM-5 membrane. On the other hand, ZSM-5 membranes prepared from the SDA-free clear solution showed high thermal stability and good separation properties. After the pretreatment at 400°C, the H2/i-C 4H10 ideal selectivity was as high as 61 at 270°C. The maximum of the n/i-C4H10 ideal selectivity was 36 at 300°C and the separation factor was as high as 12.7 at 400°C for a 50/50 n/i-C4H10 mixture.",
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