Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma
The effect of modification of MFI zeolite 1–5 wt.% ZnO activated by plasma on acid and catalytic properties in the conversion of the propane–butane fraction into arenes was investigated. The high-silica zeolites with silicate module 45 were synthesized from alkaline alumina–silica gels in the presen...
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MDPI AG
2020-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/25/11/2704 |
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| author | Vladimir I. Erofeev Sofiya N. Dzhalilova Mikhail V. Erofeev Vasilii S. Ripenko Vladimir P. Reschetilowski |
| author_facet | Vladimir I. Erofeev Sofiya N. Dzhalilova Mikhail V. Erofeev Vasilii S. Ripenko Vladimir P. Reschetilowski |
| author_sort | Vladimir I. Erofeev |
| collection | DOAJ |
| description | The effect of modification of MFI zeolite 1–5 wt.% ZnO activated by plasma on acid and catalytic properties in the conversion of the propane–butane fraction into arenes was investigated. The high-silica zeolites with silicate module 45 were synthesized from alkaline alumina–silica gels in the presence of an ‘X-oil’ organic structure-forming additive. The modification of the zeolite with zinc was carried out by impregnating the zeolite granules in the H-form with an aqueous solution of Zn(NO<sub>3</sub>)<sub>2</sub>. The obtained zeolites were characterized by X-ray phase analysis and IR spectroscopy. It is shown that the synthesized zeolites belong to the high-silica MFI zeolites. The study of microporous zeolite-containing catalysts during the conversion of C<sub>3</sub>-C<sub>4</sub> alkanes to aromatic hydrocarbons made it possible to establish that the highest yield of aromatic hydrocarbons is observed on zeolite catalysts modified with 1 and 3% ZnO and amount to 63.7 and 64.4% at 600 °C, respectively, which is 7.7–8.4% more than on the original zeolite. The preliminary activation of microporous zeolites modified with 1–5% ZnO and plasma leads to an increase in the yield of aromatic hydrocarbons from the propane–butane fraction; the maximum yield of arenes is observed in zeolite catalysts modified with 1 and 3% ZnO and activated by plasma, amounting to 64.9 and 65.5% at 600 °C, respectively, which is 8.9–9.5% more than on the initial zeolite. The activity of the zeolite catalysts modified by ZnO and activated by plasma show good agreement with their acid properties. Activation of the zeolites modified by 1 and 3% ZnO and plasma leads to an increase in the concentration of the weak acid sites of the catalyst to 707 and 764 mmol/g in comparison with plasma-inactivated 1 and 3% ZnO/ZKE-XM catalysts at 626 and 572 mmol/g, respectively. |
| first_indexed | 2024-03-10T19:15:19Z |
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| id | doaj.art-b024e07a045b4c10bf0281aad9623da4 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T19:15:19Z |
| publishDate | 2020-06-01 |
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| series | Molecules |
| spelling | doaj.art-b024e07a045b4c10bf0281aad9623da42023-11-20T03:30:14ZengMDPI AGMolecules1420-30492020-06-012511270410.3390/molecules25112704Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature PlasmaVladimir I. Erofeev0Sofiya N. Dzhalilova1Mikhail V. Erofeev2Vasilii S. Ripenko3Vladimir P. Reschetilowski4School of Earth Sciences & Engineering, National Research Tomsk Polytechnic University, Tomsk 634050, RussiaSchool of Earth Sciences & Engineering, National Research Tomsk Polytechnic University, Tomsk 634050, RussiaInstitute of High Current Electronics SB RAS, Tomsk 634055, RussiaInstitute of High Current Electronics SB RAS, Tomsk 634055, RussiaTechnical University of Dresden, 01062 Dresden, GermanyThe effect of modification of MFI zeolite 1–5 wt.% ZnO activated by plasma on acid and catalytic properties in the conversion of the propane–butane fraction into arenes was investigated. The high-silica zeolites with silicate module 45 were synthesized from alkaline alumina–silica gels in the presence of an ‘X-oil’ organic structure-forming additive. The modification of the zeolite with zinc was carried out by impregnating the zeolite granules in the H-form with an aqueous solution of Zn(NO<sub>3</sub>)<sub>2</sub>. The obtained zeolites were characterized by X-ray phase analysis and IR spectroscopy. It is shown that the synthesized zeolites belong to the high-silica MFI zeolites. The study of microporous zeolite-containing catalysts during the conversion of C<sub>3</sub>-C<sub>4</sub> alkanes to aromatic hydrocarbons made it possible to establish that the highest yield of aromatic hydrocarbons is observed on zeolite catalysts modified with 1 and 3% ZnO and amount to 63.7 and 64.4% at 600 °C, respectively, which is 7.7–8.4% more than on the original zeolite. The preliminary activation of microporous zeolites modified with 1–5% ZnO and plasma leads to an increase in the yield of aromatic hydrocarbons from the propane–butane fraction; the maximum yield of arenes is observed in zeolite catalysts modified with 1 and 3% ZnO and activated by plasma, amounting to 64.9 and 65.5% at 600 °C, respectively, which is 8.9–9.5% more than on the initial zeolite. The activity of the zeolite catalysts modified by ZnO and activated by plasma show good agreement with their acid properties. Activation of the zeolites modified by 1 and 3% ZnO and plasma leads to an increase in the concentration of the weak acid sites of the catalyst to 707 and 764 mmol/g in comparison with plasma-inactivated 1 and 3% ZnO/ZKE-XM catalysts at 626 and 572 mmol/g, respectively.https://www.mdpi.com/1420-3049/25/11/2704MFI zeolitemodificationzinc oxideplasma activationaciditypropane–butane fraction |
| spellingShingle | Vladimir I. Erofeev Sofiya N. Dzhalilova Mikhail V. Erofeev Vasilii S. Ripenko Vladimir P. Reschetilowski Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma Molecules MFI zeolite modification zinc oxide plasma activation acidity propane–butane fraction |
| title | Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma |
| title_full | Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma |
| title_fullStr | Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma |
| title_full_unstemmed | Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma |
| title_short | Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma |
| title_sort | conversion of the propane butane fraction into arenes on mfi zeolites modified by zinc oxide and activated by low temperature plasma |
| topic | MFI zeolite modification zinc oxide plasma activation acidity propane–butane fraction |
| url | https://www.mdpi.com/1420-3049/25/11/2704 |
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