Cobalt-zeolite Fischer–Tropsch catalysts with different types of aluminum metal powderстатья
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 февраля 2024 г.
Аннотация:Fischer–Tropsch synthesis, which is accompanied by the release of a significant amount of heat, inevitably imposes strict requirements on heat and mass transfer in the catalyst bed to ensure
E.Yu. Asalieva, L.V. Sineva, V.Z. MordkovichChe mChe mTech. 2023. V. 66. N 1045high productivity and selectivity for C5+hydrocarbons. In this work, various types of aluminum metal powder were used as a heat-conducting additive, which were introduced into the composition of granular composite cobalt-zeolite catalyst. The influence of the aluminum metal powder particle size on some physicochemical characteristics of the composite, the main catalytic parameters and the composition of the formed C5+hydrocarbons was studied. Synthesized and investigated Fischer–Tropsch synthesis catalysts, containing aluminum metal powder as a heat-conducting additive, which differs in shape and particle size, exhibited different catalytic activity in the formation of C5+hydrocarbons and differed in the composition of the obtained products. It has been established that the particle size of the initial powder of heat-conducting additive determines the heat-conducting properties of the synthesized composite: the larger the particle size of the initial aluminum metal powder, the higher the thermal conductivity of the formed support. This, in turn, determined the productivity of the composite in the synthesis of C5+hydrocarbons from CO and H2. The porous system depended primarily on the shape of the particles (sphere or flake) and the manufacturer of the aluminum metal powder. The selectivity of the catalyst and the composition of the synthesis products, apparently, depended on the method of preparation and the chemical composition of the aluminum powder to a greater extent than on their size. The most selective in the formation of liquid hydrocarbons was catalyst containing aluminum metal flakes PAP-2 manufactured by RUSAL. It also had rather high C5+hydrocarbons productivity, which makes it the most promising for further use due to its cost and availability on the Russian market.