TY - JOUR

T1 - Development of a Strengthened Al2O3 Based Material for Use in Waste Combustion Plants

AU - Lyulyukin, A. P.

AU - Dubinin, Yu V.

AU - Kukushkin, R. G.

AU - Yakovlev, V. A.

N1 - This study was supported by the Ministry of Science and Higher Education of the Russian Federation under a state task to the Boreskov Institute of Catalysis of the Siberian Branch of the Russian Academy of Sciences (project no. FWUR-2024-0038). Development of a Strengthened Al2O3 Based Material for Use in Waste Combustion Plants / A. P. Lyulyukin, Yu. V. Dubinin, R. G. Kukushkin, V. A. Yakovlev // Catalysis in Industry. – 2025. – Vol. 17, No. 1. – P. 66-74. – DOI 10.1134/S2070050424700417.

PY - 2025/5/23

Y1 - 2025/5/23

N2 - Abstract: Fluidized bed catalytic combustion is the most environmentally friendly and energy-efficient method for converting various fuels, in particular, low-grade fuels. The technology involves the oxidation of volatile substances on the surface of catalyst particles diluted with an inert material in a fluidized bed. The conventional use of quartz sand as an inert material leads to the accelerated degradation of the catalyst during on-stream use due to abrasion. This study is focused on the effect of the magnesium modification of active spherical Al2O3 and the development of a strengthened material (with crushing and abrasion strengths comparable to the values for a deep oxidation catalyst (DOC)) capable of minimizing DOC losses. The modified support is synthesized by impregnating spherical Al2O3 pellets with a precursor solution (nitrate and acetate) and subsequently calcining the pellets at 80°C. The resulting pellets are studied by X-ray fluorescence analysis (XRF), inductively coupled plasma optical emission spectroscopy (ICP-OES), low-temperature nitrogen adsorption (BET), and scanning electron microscopy (SEM). In addition, the mechanical strength of the pellets and their catalytic activity in CO oxidation are determined. It is found that the strength characteristics of Al2O3 linearly increase upon the introduction of magnesium in an amount of 2–9 wt %. The use of the selected material under laboratory conditions provides a threefold decrease in catalyst losses during 4.5-h abrasion compared with losses in the case of using quartz sand.

AB - Abstract: Fluidized bed catalytic combustion is the most environmentally friendly and energy-efficient method for converting various fuels, in particular, low-grade fuels. The technology involves the oxidation of volatile substances on the surface of catalyst particles diluted with an inert material in a fluidized bed. The conventional use of quartz sand as an inert material leads to the accelerated degradation of the catalyst during on-stream use due to abrasion. This study is focused on the effect of the magnesium modification of active spherical Al2O3 and the development of a strengthened material (with crushing and abrasion strengths comparable to the values for a deep oxidation catalyst (DOC)) capable of minimizing DOC losses. The modified support is synthesized by impregnating spherical Al2O3 pellets with a precursor solution (nitrate and acetate) and subsequently calcining the pellets at 80°C. The resulting pellets are studied by X-ray fluorescence analysis (XRF), inductively coupled plasma optical emission spectroscopy (ICP-OES), low-temperature nitrogen adsorption (BET), and scanning electron microscopy (SEM). In addition, the mechanical strength of the pellets and their catalytic activity in CO oxidation are determined. It is found that the strength characteristics of Al2O3 linearly increase upon the introduction of magnesium in an amount of 2–9 wt %. The use of the selected material under laboratory conditions provides a threefold decrease in catalyst losses during 4.5-h abrasion compared with losses in the case of using quartz sand.

KW - alumina

KW - catalyst

KW - combustion

KW - fluidized bed

KW - strengthening

UR - https://www.mendeley.com/catalogue/1845463d-d520-38f8-b8ab-bd933469af2a/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105006707195&origin=inward&txGid=18ce4d88e2bb7f624aee4c0192a9a871

UR - https://www.elibrary.ru/item.asp?id=82358115

U2 - 10.1134/S2070050424700417

DO - 10.1134/S2070050424700417

M3 - Article

VL - 17

SP - 66

EP - 74

JO - Catalysis in Industry

JF - Catalysis in Industry

SN - 2070-0504

IS - 1

ER -