Elsevier

Catalysis Today

Volume 3, Issues 2–3, June 1988, Pages 175-184
Catalysis Today

Selective oxidation in riser reactor

https://doi.org/10.1016/0920-5861(88)87007-XGet rights and content

Abstract

A recirculating solids riser reactors offer several advantages over fixed bed and fluidized bed reactors for vapor phase oxidation reactions. In such a reactor, the organic is oxidized in a riser reactor zone using oxidized catalyst, and the reduced catalyst is reoxidized to its optimum state in a separate fluidized bed regenerator zone. The recirculating catalyst remains in a transient cyclic state. The viability of the concept and its performance advantages over the alternatives will be described for oxidation of butane to maleic anhydride. Potential of the reactor in developing an improved understanding of the reaction pathway will also be discussed.

References (7)

  • G. Centi et al.

    J. Catal.

    (1984)
  • Yu.Sh. Matros
    (1985)
  • R.M. Contractor et al.
There are more references available in the full text version of this article.

Cited by (72)

  • Modeling the selective oxidation of n-butane to maleic anhydride: From active site to industrial reactor

    2022, Catalysis Today
    Citation Excerpt :

    Adsorbed oxygen species are considered as strong oxidizing agents for the total oxidation of n-butane [27,108]. Such considerations and the possibility of separately optimizing the operating conditions for reduction or reoxidation of the catalyst have led to the development of DuPont's circulating fluidized bed concept [27,172]. From the existence of this process, Sahakini et al. [169] concluded that the involvement of chemisorbed oxygen in the n-butane oxidation process can be excluded.

  • Bulk phase charge transfer in focus – And in sequential along with surface steps

    2021, Catalysis Today
    Citation Excerpt :

    The MvK mechanism has been the base for many practical selective and non-selective catalytic oxidation processes [22,23], and more recently, chemical looping [24–26] and rich oxygen combustion [27,28] have been observed in industrial practices. For instance, Dupont previously made an attempt in utilizing circulating fluidized-bed reactors for mass production of maleic anhydride with a vanadium phosphorus oxide catalyst, where the selective oxidation of n-butane and the re-oxidation of the catalyst occur in two separate reactors [29–31]. Even though this approach was eventually not adopted in the commercial practice, the concept behind has been intriguing.

  • Multi-objective optimization of maleic anhydride circulating fluidized bed (CFB) reactors

    2019, Chemical Engineering Research and Design
    Citation Excerpt :

    The fluidized bed reactor, though, leads to high Bu conversions due to high back mixing, which results in a reduction of the MA selectivity and thus, the MA productivity (Contractor, 1999). Researchers at DuPont (Contractor, 1999; Contractor et al., 1994, 1987; Contractor and Sleight, 1988) have proposed the use of circulating fluidized bed (CFB) reactors for MA production. It is reported (Contractor, 1999) that the MA CFB reactor has all the advantages of a fluidized bed reactor over the fixed bed reactor.

View all citing articles on Scopus
View full text