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Metal-Containing Granulated Yh Zeolites with Hierarchic Structure in Isophorone Aromatization
https://orcid.org/https://orcid.org/0000-0001-6451-9205
https://orcid.org/https://orcid.org/0000-0002-0671-6048
https://orcid.org/https://orcid.org/0009-0000-6961-9790
https://orcid.org/https://orcid.org/0000-0001-6778-4872
https://orcid.org/https://orcid.org/0000-0003-1206-4637
https://orcid.org/https://orcid.org/0000-0002-2230-772X
https://orcid.org/https://orcid.org/0000-0002-5946-3814
https://orcid.org/https://orcid.org/0000-0002-6601-390X
https://orcid.org/https://orcid.org/0000-0003-0745-5510
The physicochemical properties of a series of catalysts based on granulated Na-Yh zeolite with the hierarchic (micro–meso–macro) pore structure (Na-Yh, HNa-Yh, MgO/Na-Yh, La2O3/Na-Yh, TiO2/Na-Yh) and the activity and selectivity of these catalysts in isophorone aromatization were studied. MgO/Na-Yh and La2O3/Na-Yh zeolites with high content of basic sites and low content of Brønsted acid sites are the most effective in the synthesis of 3,5-dimethylphenol: The 3,5-dimethylphenol formation selectivity reaches 63–69% at 87–94% isophorone conversion. In the presence of Na-Yh zeolite containing both acid and base sites, the prevalent reactions are isophorone isomerization and synthesis of trimethylbenzenes. The modification of Na-Yh with titanium oxide leads to an increase in the content of acid sites on the TiO2/Na-Yh surface and to the prevalence of the aromatization to form trimethylbenzenes. In the presence of HNa-Yh containing a set of the strongest Brønsted and Lewis acid sites, isophorone transforms into a mixture of polymethylbenzenes.
Metal-Containing Granulated Yh Zeolites with Hierarchic Structure in Isophorone Aromatization
https://orcid.org/https://orcid.org/0000-0001-6451-9205
https://orcid.org/https://orcid.org/0000-0002-0671-6048
https://orcid.org/https://orcid.org/0009-0000-6961-9790
https://orcid.org/https://orcid.org/0000-0001-6778-4872
https://orcid.org/https://orcid.org/0000-0003-1206-4637
https://orcid.org/https://orcid.org/0000-0002-2230-772X
https://orcid.org/https://orcid.org/0000-0002-5946-3814
https://orcid.org/https://orcid.org/0000-0002-6601-390X
https://orcid.org/https://orcid.org/0000-0003-0745-5510
The physicochemical properties of a series of catalysts based on granulated Na-Yh zeolite with the hierarchic (micro–meso–macro) pore structure (Na-Yh, HNa-Yh, MgO/Na-Yh, La2O3/Na-Yh, TiO2/Na-Yh) and the activity and selectivity of these catalysts in isophorone aromatization were studied. MgO/Na-Yh and La2O3/Na-Yh zeolites with high content of basic sites and low content of Brønsted acid sites are the most effective in the synthesis of 3,5-dimethylphenol: The 3,5-dimethylphenol formation selectivity reaches 63–69% at 87–94% isophorone conversion. In the presence of Na-Yh zeolite containing both acid and base sites, the prevalent reactions are isophorone isomerization and synthesis of trimethylbenzenes. The modification of Na-Yh with titanium oxide leads to an increase in the content of acid sites on the TiO2/Na-Yh surface and to the prevalence of the aromatization to form trimethylbenzenes. In the presence of HNa-Yh containing a set of the strongest Brønsted and Lewis acid sites, isophorone transforms into a mixture of polymethylbenzenes.
Metal-Containing Granulated Yh Zeolites with Hierarchic Structure in Isophorone Aromatization
https://orcid.org/https://orcid.org/0000-0001-6451-9205
https://orcid.org/https://orcid.org/0000-0002-0671-6048
https://orcid.org/https://orcid.org/0009-0000-6961-9790
https://orcid.org/https://orcid.org/0000-0001-6778-4872
https://orcid.org/https://orcid.org/0000-0003-1206-4637
https://orcid.org/https://orcid.org/0000-0002-2230-772X
https://orcid.org/https://orcid.org/0000-0002-5946-3814
https://orcid.org/https://orcid.org/0000-0002-6601-390X
https://orcid.org/https://orcid.org/0000-0003-0745-5510
The physicochemical properties of a series of catalysts based on granulated Na-Yh zeolite with the hierarchic (micro–meso–macro) pore structure (Na-Yh, HNa-Yh, MgO/Na-Yh, La2O3/Na-Yh, TiO2/Na-Yh) and the activity and selectivity of these catalysts in isophorone aromatization were studied. MgO/Na-Yh and La2O3/Na-Yh zeolites with high content of basic sites and low content of Brønsted acid sites are the most effective in the synthesis of 3,5-dimethylphenol: The 3,5-dimethylphenol formation selectivity reaches 63–69% at 87–94% isophorone conversion. In the presence of Na-Yh zeolite containing both acid and base sites, the prevalent reactions are isophorone isomerization and synthesis of trimethylbenzenes. The modification of Na-Yh with titanium oxide leads to an increase in the content of acid sites on the TiO2/Na-Yh surface and to the prevalence of the aromatization to form trimethylbenzenes. In the presence of HNa-Yh containing a set of the strongest Brønsted and Lewis acid sites, isophorone transforms into a mixture of polymethylbenzenes.
Metal-Containing Granulated Yh Zeolites with Hierarchic Structure in Isophorone Aromatization
Pet. Chem.
Grigor’eva, N. G. (author) / Kirsanov, V. Yu. (author) / Korzhova, L. F. (author) / Karchevskii, S. G. (author) / Khazipova, A. N. (author) / Bubennov, S. V. (author) / Bikbaeva, V. R. (author) / Serebrennikov, D. V. (author) / Kutepov, B. I. (author)
Petroleum Chemistry ; 64 ; 267-277
2024-02-01
11 pages
Article (Journal)
Electronic Resource
English
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