Crystallization of magnesium aluminophosphate molecular sieves MAPO-11 using different aluminum sources and their application in the hydroisomerization of  n -hexadecane

Dmitry Serebrennikov; Maxim Vlasov; Olga Travkina; Nadezhda Filippova; Ekaterina Mescheryakova; Rezeda Kuvatova; Denis Sabirov; Marat R. Agliullin

doi:10.15826/chimtech.2025.12.3.01

Crystallization of magnesium aluminophosphate molecular sieves MAPO-11 using different aluminum sources and their application in the hydroisomerization of n-hexadecane

Dmitry Serebrennikov, Maxim Vlasov, Olga Travkina, Nadezhda Filippova, Ekaterina Mescheryakova, Rezeda Kuvatova, Denis Sabirov, Marat R. Agliullin

Abstract

Magnesium aluminophosphate molecular sieves are promising materials for the development of catalysts for the hydroisomerization of higher n-paraffins in fuels and oils. One of the key issues in increasing their activity and selectivity in hydroisomerization is the necessity to reduce the diffusion limitations by reducing the size of the crystals or creating a developed secondary porous structure. The physicochemical and catalytic properties of MAPO-11 molecular sieves prepared with different aluminum sources in the hydroisomerization of n-hexadecane were studied. The influence of the aluminum source on the morphology and size of the MAPO-11 crystals was determined. The use of aluminum isopropoxide as the aluminum source allows MAPO-11 to be obtained with a smaller crystal size and larger mesopore volume compared to the use of boehmite. Due to the stronger acidic sites in MAPO-11 compared to SAPO-11, Pt-based catalysts based on MAPO-11 can achieve maximum isomer yield at lower temperatures. MAPO-11-based catalytic systems with a micro-mesoporous structure exhibit superior activity and selectivity in the hydroisomerization of n-hexadecane in comparison with microporous molecular sieves.

Keywords

molecular sieves; magnesium aluminum phosphates MAPO-11; micro-mesoporous materials; hydroisomerization of higher n-paraffins; bifunctional catalysts

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DOI: https://doi.org/10.15826/chimtech.2025.12.3.01

Copyright (c) 2025 Dmitry Serebrennikov, Maxim Vlasov, Olga Travkina, Nadezhda Filippova, Ekaterina Mescheryakova, Rezeda Kuvatova, Denis Sabirov, Marat R. Agliullin

This work is licensed under a Creative Commons Attribution 4.0 International License.

Chimica Techno Acta, 2014–2025
eISSN 2411-1414
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