High-throughput screening of Co-BEA and Co-ZSM-5 coatings in the ammoxidation of ethylene to acetonitrile in a microstructured reactor

M.J.M. Mies, E.V. Rebrov, C.J.B.U. Schiepers, M.H.J.M. Croon, de, J.C. Schouten

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

17 Citaten (Scopus)

Samenvatting

The activity and selectivity of Co-ZSM-5 and Co-BEA coatings (Si/Al=15–23) with a thickness of 1 um deposited on a Mo substrate were determined in the ammoxidation of ethylene in a microreactor. Zeolite Beta coatings were more than twice as selective towards the acetonitrile formation than ZSM-5 coatings. The rate of acetonitrile formation increased by a factor of 6 by increasing the aluminum content in the coatings from a Si/Al ratio of 23 to 15. The effect of the Co/Al ratio was less pronounced. The addition of small amounts of boron decreased the selectivity to acetonitrile in the whole range of Si/Al ratios studied. A maximum TOF of 0.8 / 1s was obtained at a reaction temperature of 500 °C, with a selectivity of 58% to acetonitrile. The optimized zeolitic coatings show higher reaction rates than a pelletized Co-ZSM-5 catalyst.
Originele taal-2Engels
Pagina's (van-tot)5097-5101
TijdschriftChemical Engineering Science
Volume62
Nummer van het tijdschrift18-20
DOI's
StatusGepubliceerd - 2007

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