Abstract: Novel WO3–ZrO2 (WZ) catalysts with palladium as an active metal on porous alumina supports of various phase compositions have been synthesized. Aluminas from Sasol molded in the form of extrudates (E) and spherical aluminas (S), in which the phase composition is presented by θ-Al2O3, δ-Al2O3, and α-Al2O3 alumina, have been used as supports. It has been shown that the phase composition of the support has a significant effect on the activity of supported Pd/WZ catalysts based on it. Upon transition from a set of θ- and δ-Al2O3 phases to the θ- and α-Al2O3 phase composition has led to an increase in the activity of the catalysts, as evidenced by a shift of 10–30°C in the temperature dependences of the heptane conversion to lower temperatures. The appearance of the α-Al2O3 phase is accompanied by a decrease in the specific surface area of the catalysts, which leads to an increase in the density of acid sites and, as a consequence, a change in activity. The Pd/WZ catalysts supported on S aluminas are characterized by a higher acidity (3.7–6.3 μmol/m2) as compared to the samples supported on E aluminas (2.8–3.6 µmol/m2). The high acidity of the Pd/WZ/S catalysts intensifies the heptane cracking side reactions to form gaseous C1–C4 hydrocarbons. In turn, the moderate acidity of the Pd/WZ/E catalysts contributes to a higher selectivity to heptane isomers (89.2–89.3% at a heptane conversion of 81.5–83.2%) as compared to the catalysts supported on S supports (isomerization selectivity of 84.9–85.6% at a heptane conversion of 80.4–81.4%).

Cite: Smolikov M.D. , Shkurenok V.A. , Yablokova S.S. , Kazantsev K.V. , Gulyaeva T.I. , Muromtsev I.V. , Lavrenov A.V.
Porous Alumina-Supported Tungstated Zirconia Catalysts for Heptane Isomerization
Catalysis in Industry. 2024. V.16. N2. P.133-140. DOI: 10.1134/s207005042470003x WOS Scopus OpenAlex publication_identifier_short.sciact_ihcp_identifier_type

Original: Смоликов М.Д. , Шкуренок В.А. , Яблокова С.С. , Казанцев К.В. , Гуляева Т.И. , Муромцев И.В. , Лавренов А.В.
Нанесенные на пористый носитель вольфраматциркониевые катализаторы для изомеризации гептана
Катализ в промышленности. 2023. Т.23. №5. С.6-13. DOI: 10.18412/1816-0387-2023-5-6-13 РИНЦ AN OpenAlex publication_identifier_short.sciact_ihcp_identifier_type

Dates:

Submitted:	Apr 18, 2023
Accepted:	May 29, 2023
Published online:	May 27, 2024
Published print:	Jun 1, 2024

Identifiers:

Web of science:	WOS:001233407500002
Scopus:	2-s2.0-85194881091
OpenAlex:	W4399045525
publication_identifier.sciact_ihcp_identifier_type:	4356

Citing: Пока нет цитирований

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