Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian Kaolin
A series of samples of zeolite-containing microspheres (ZCMS) and fluid catalytic cracking (FCC) catalysts based on Prosyana (Ukraine) kaolin were synthesized in situ. Their adsorption and chemisorption characteristics were recorded using a nitrogen low-temperature adsorption/desorption method and t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
2001-09-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617011494376 |
| _version_ | 1797283716069851136 |
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| author | L. Patrylak R. Likhnyovskyi V. Vypyraylenko R. Leboda J. Skubiszewska-Zięba K. Patrylak |
| author_facet | L. Patrylak R. Likhnyovskyi V. Vypyraylenko R. Leboda J. Skubiszewska-Zięba K. Patrylak |
| author_sort | L. Patrylak |
| collection | DOAJ |
| description | A series of samples of zeolite-containing microspheres (ZCMS) and fluid catalytic cracking (FCC) catalysts based on Prosyana (Ukraine) kaolin were synthesized in situ. Their adsorption and chemisorption characteristics were recorded using a nitrogen low-temperature adsorption/desorption method and temperature programmed desorption (TPD) of ammonia, respectively. It was shown that changes in the synthesis conditions had a considerable impact on the micro- and meso-porosity of the samples. A low-temperature band dominated the ammonia TPD spectra of the ZCMS samples, reflecting the retention of ammonia by the sodium cations of the zeolite acting as weak Lewis acid sites. ZCMS was found to display an appreciable activity in cumene cracking at 723 K. It was shown that during the conversion of ZCMS to FCC catalysts through the decationization and ultra-stabilization of the zeolite phase, the latter is appreciably destroyed giving rise to a considerable increase in the mesoporosity of the samples without any change in the average diameters of such mesopores. It was concluded that the catalyst stability is characterized by pores of an intermediate (20–30 Å) diameter, thereby demonstrating the strength of the linkage between the zeolite and matrix phases. The zeolite phase content and adsorption characteristics of catalysts prepared on the basis of Prosyana kaolin meet the demands of modern FCC catalysts. |
| first_indexed | 2024-03-07T17:35:49Z |
| format | Article |
| id | doaj.art-34dd36cd0e1844029e54d6b9c224e736 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:35:49Z |
| publishDate | 2001-09-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-34dd36cd0e1844029e54d6b9c224e7362024-03-02T16:52:36ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382001-09-011910.1260/0263617011494376Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian KaolinL. Patrylak0R. Likhnyovskyi1V. Vypyraylenko2R. Leboda3J. Skubiszewska-Zięba4K. Patrylak Institute of Bioorganic Chemistry & Petrochemistry, National Academy of Sciences of Ukraine, 1, Murmans'ka vul., 02094 Kiev, Ukraine Institute of Bioorganic Chemistry & Petrochemistry, National Academy of Sciences of Ukraine, 1, Murmans'ka vul., 02094 Kiev, Ukraine Institute of Bioorganic Chemistry & Petrochemistry, National Academy of Sciences of Ukraine, 1, Murmans'ka vul., 02094 Kiev, Ukraine Department of Chemical Physics, Faculty of Chemistry, Maria Curie-Skłodowska University, 3, Maria Curie-Skłodowska Sq., 20-031 Lublin, Poland Department of Chemical Physics, Faculty of Chemistry, Maria Curie-Skłodowska University, 3, Maria Curie-Skłodowska Sq., 20-031 Lublin, PolandA series of samples of zeolite-containing microspheres (ZCMS) and fluid catalytic cracking (FCC) catalysts based on Prosyana (Ukraine) kaolin were synthesized in situ. Their adsorption and chemisorption characteristics were recorded using a nitrogen low-temperature adsorption/desorption method and temperature programmed desorption (TPD) of ammonia, respectively. It was shown that changes in the synthesis conditions had a considerable impact on the micro- and meso-porosity of the samples. A low-temperature band dominated the ammonia TPD spectra of the ZCMS samples, reflecting the retention of ammonia by the sodium cations of the zeolite acting as weak Lewis acid sites. ZCMS was found to display an appreciable activity in cumene cracking at 723 K. It was shown that during the conversion of ZCMS to FCC catalysts through the decationization and ultra-stabilization of the zeolite phase, the latter is appreciably destroyed giving rise to a considerable increase in the mesoporosity of the samples without any change in the average diameters of such mesopores. It was concluded that the catalyst stability is characterized by pores of an intermediate (20–30 Å) diameter, thereby demonstrating the strength of the linkage between the zeolite and matrix phases. The zeolite phase content and adsorption characteristics of catalysts prepared on the basis of Prosyana kaolin meet the demands of modern FCC catalysts.https://doi.org/10.1260/0263617011494376 |
| spellingShingle | L. Patrylak R. Likhnyovskyi V. Vypyraylenko R. Leboda J. Skubiszewska-Zięba K. Patrylak Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian Kaolin Adsorption Science & Technology |
| title | Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian Kaolin |
| title_full | Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian Kaolin |
| title_fullStr | Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian Kaolin |
| title_full_unstemmed | Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian Kaolin |
| title_short | Adsorption Properties of Zeolite-Containing Microspheres and FCC Catalysts Based on Ukrainian Kaolin |
| title_sort | adsorption properties of zeolite containing microspheres and fcc catalysts based on ukrainian kaolin |
| url | https://doi.org/10.1260/0263617011494376 |
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