CATALYTIC PERFORMANCE OF Ni-BASED CATALYST SUPPORTED ON MOLECULAR SIEVE IN HYDROGENATION OF 1,4-BUTYNEDIOL TO 1,4-BUTENEDIOL

Abstract

Abstract: Molecular sieve-supported nickel-based catalysts with a mass fraction of Ni of 17% were prepared on USY, ZSM-5, SBA-15 and Al₂O₃ by equal volume impregnation method, and the catalysts were characterized by XRD, BET, H₂-TPR and NH₃-TPD, respectively. The Ni-based catalyst was used to transform 1,4-butynediol (BYD) to 1,4-butenediol (BED). Its hydrogenation activity was investigated at a H₂ pressure of 4 MPa, with a temperature of 120 ℃ and at different reaction time. The results showed that the conversion of BYD was different among the catalysts with different supports. Under the same reaction conditions, the BYD conversion of Ni/SBA-15 reached 97.8% and the selectivity of BED was 98.7%, whereas the selectivity of 2-hydroxytetrahydrofuran （HTHF） was the lowest. This is due to larger specific surface area and pore size of Ni/SBA-15, good dispersion of active component Ni and weak acidity.

Key words: molecular sieve, catalyst support, hydrogenation catalyst, SBA-15, 1,4-butynediol, 1,4-butenediol

References

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