Recycling of wastes from the production of alumina-based catalyst carriers

Anna N. Matveyeva, Nikolai A. Pakhomov, Dmitry Murzin

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Preparation of microspherical chromia–alumina KDM-type catalysts for alkane dehydrogenation is based on utilization of an amorphous nanostructured hydroxide–oxide Al2O3x(OH)2·nH2O (where x = 0–0.28, n = 0.03–1.8) prepared via the centrifugal thermal activation (CTA) of gibbsite. The fine fraction of this carrier is considered as industrial waste, requiring efficient recycling options, which are explored in this work. A range of physicochemical methods was applied to analyze the main properties (phase composition, morphology, reactivity, etc.) of pilot and industrial batches of gibbsite CTA products. It has been clearly shown that the properties of CTA products are dependent on the nature of gibbsite used. The largest amount of the active amorphous phase of alumina is formed using gibbsite made from concentrated nepheline. Regularities of rehydration of the CTA-products fine fraction in acidic/alkaline media and dissolution in sulfuric acid of the fine fraction of gibbsite and the industrial CTA product were explored to prepare aluminum sulfate, which is a water purification coagulant.
Original languageUndefined/Unknown
Pages (from-to)9101–9108
JournalIndustrial & Engineering Chemistry Research
Volume55
Issue number34
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • engineering education

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