Targeted synthesis of a copper catalyst with a nanostructured active component


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Abstract

The effect of the hydrodynamic regime in the stirring of a copper carbonate–ammonia suspension containing an alumina–silica support on the chemical and phase composition of an active component (AC) precursor for a catalyst of cyclohexanol dehydrogenation to cyclohexanone is studied. By means of X-ray diffraction, differential thermal analysis, and adsorption, the precursor is found to precipitate in a developed turbulent regime, predominantly in the form of nanostructured hydroxocarbonate structures strongly bonded to the support. Some catalytic and textural properties of CAS-C (copper–alumina–silica for caprolactam) samples are studied with AC contents of 20 to 30 wt % (on a copper oxide basis). The laboratory technology is scaled up to industrial conditions. CAS-C samples and commercial H3-11 catalyst (BASF) are subjected to catalytic tests (in a flow-type reactor with a fixed catalyst bed 40 cm3 in volume at a temperature of 250°C and atmospheric pressure). The CAS-C catalyst is shown to be similar to the H3-11 catalyst in terms of selectivity, and to considerably surpass it in activity and thermal stability.

About the authors

V. I. Vanchurin

Mendeleev University of Chemical Technology

Author for correspondence.
Email: vanchourin@mail.ru
Russian Federation, Moscow, 125047

Yu. L. Pavlov

Mendeleev University of Chemical Technology

Email: vanchourin@mail.ru
Russian Federation, Moscow, 125047

A. Yu. Petrov

Mendeleev University of Chemical Technology

Email: vanchourin@mail.ru
Russian Federation, Moscow, 125047

L. I. Marachuk

OAO Grodno Azot

Email: vanchourin@mail.ru
Belarus, Grodno, 230013

O. I. Karachenko

OAO Grodno Azot

Email: vanchourin@mail.ru
Belarus, Grodno, 230013

A. V. Dul’nev

OOO NIAP KATALIZATOR

Email: vanchourin@mail.ru
Russian Federation, Novomoskovsk, Tula oblast, 301660

L. D. Rudnik

OAO Plazmatekh

Email: vanchourin@mail.ru
Russian Federation, Novomoskovsk, Tula oblast, 301660

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