Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactions
In this work, monolithic silica materials with hierarchical porosity were synthesized by the sol-gel method combined with a dual hard-soft templating route. Silica materials were used for the synthesis of hydrodesulfurization CoMoW-S catalysts by the immersion technique using transition metal salts...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Chemical Engineering Journal Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821123000121 |
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| author | M.A. López-Mendoza R. Nava B. Millán-Malo C. Peza-Ledesma R. Huirache-Acuña J.C. Morales-Ortuño S.J. Guevara-Martínez J.N.Díaz de León E.M. Rivera-Muñoz |
| author_facet | M.A. López-Mendoza R. Nava B. Millán-Malo C. Peza-Ledesma R. Huirache-Acuña J.C. Morales-Ortuño S.J. Guevara-Martínez J.N.Díaz de León E.M. Rivera-Muñoz |
| author_sort | M.A. López-Mendoza |
| collection | DOAJ |
| description | In this work, monolithic silica materials with hierarchical porosity were synthesized by the sol-gel method combined with a dual hard-soft templating route. Silica materials were used for the synthesis of hydrodesulfurization CoMoW-S catalysts by the immersion technique using transition metal salts as precursors, followed by oxidation and sulfidation in H2S/H2 mixture. Styrene-HEMA copolymer hard template presented homogeneous well-defined spherical shape with an average diameter of about 800 nm. Samples prepared over the hard template presented similar morphology. The surface areas of all supports prepared resulted in around 800 m2.g−1 and decreased to 220 m2.g−1 on average after the sulfidation process. Small-angle X-ray diffraction confirmed the presence of the 2D hexagonal or Im3m array of mesopores in all samples. The CoMoW oxide state catalysts presented low intensity peaks assigned to the b-CoMo(W)O4 phase and minor peaks related to MoO3 and polyoxides with the general formula MoxW1-xO3. The high conversion was obtained for catalysts supported on hierarchically structured porous silicas, even greater than that of the commercial catalyst used as reference (>30–50%). XPS results revealed that the degree of sulfidation and CoMoWS active species resulted higher in the CoMoW-HOPSCM catalyst compared to the CoMoW-MoNoSBA-15 sample, which in turn coincides with the catalytic activity results. |
| first_indexed | 2024-04-09T14:11:55Z |
| format | Article |
| id | doaj.art-56622e0edc904c6b9dec0222638a744f |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-04-09T14:11:55Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-56622e0edc904c6b9dec0222638a744f2023-05-06T04:39:07ZengElsevierChemical Engineering Journal Advances2666-82112023-05-0114100454Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactionsM.A. López-Mendoza0R. Nava1B. Millán-Malo2C. Peza-Ledesma3R. Huirache-Acuña4J.C. Morales-Ortuño5S.J. Guevara-Martínez6J.N.Díaz de León7E.M. Rivera-Muñoz8Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Departamento de Nanotecnología, A.P. 1-1010 Querétaro,Qro. C.P. 76000, MexicoFacultad de Ingeniería, Universidad Autónoma de Querétaro, Centro Universitario, Cerro de las Campanas, 76010, Querétaro, MexicoCentro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Departamento de Nanotecnología, A.P. 1-1010 Querétaro,Qro. C.P. 76000, MexicoCentro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Departamento de Nanotecnología, A.P. 1-1010 Querétaro,Qro. C.P. 76000, MexicoFacultad de Ingeniería Química, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, 58060, Morelia, Michoacán, Mexico; Corresponding author.Facultad de Ingeniería Química, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, 58060, Morelia, Michoacán, MexicoInstituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, 58060, Morelia, Michoacán, MexicoUniversidad Nacional Autónoma de México (UNAM), Centro de Nanociencias y Nanotecnología, Carretera Tijuana- Ensenada Km. 107, Col. Pedregal Playitas, C.P. 22860, Ensenada, Baja California, MexicoCentro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Departamento de Nanotecnología, A.P. 1-1010 Querétaro,Qro. C.P. 76000, MexicoIn this work, monolithic silica materials with hierarchical porosity were synthesized by the sol-gel method combined with a dual hard-soft templating route. Silica materials were used for the synthesis of hydrodesulfurization CoMoW-S catalysts by the immersion technique using transition metal salts as precursors, followed by oxidation and sulfidation in H2S/H2 mixture. Styrene-HEMA copolymer hard template presented homogeneous well-defined spherical shape with an average diameter of about 800 nm. Samples prepared over the hard template presented similar morphology. The surface areas of all supports prepared resulted in around 800 m2.g−1 and decreased to 220 m2.g−1 on average after the sulfidation process. Small-angle X-ray diffraction confirmed the presence of the 2D hexagonal or Im3m array of mesopores in all samples. The CoMoW oxide state catalysts presented low intensity peaks assigned to the b-CoMo(W)O4 phase and minor peaks related to MoO3 and polyoxides with the general formula MoxW1-xO3. The high conversion was obtained for catalysts supported on hierarchically structured porous silicas, even greater than that of the commercial catalyst used as reference (>30–50%). XPS results revealed that the degree of sulfidation and CoMoWS active species resulted higher in the CoMoW-HOPSCM catalyst compared to the CoMoW-MoNoSBA-15 sample, which in turn coincides with the catalytic activity results.http://www.sciencedirect.com/science/article/pii/S2666821123000121MonolithicSilica materialsCoMoW-S catalystsHydrodesulfurization |
| spellingShingle | M.A. López-Mendoza R. Nava B. Millán-Malo C. Peza-Ledesma R. Huirache-Acuña J.C. Morales-Ortuño S.J. Guevara-Martínez J.N.Díaz de León E.M. Rivera-Muñoz Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactions Chemical Engineering Journal Advances Monolithic Silica materials CoMoW-S catalysts Hydrodesulfurization |
| title | Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactions |
| title_full | Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactions |
| title_fullStr | Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactions |
| title_full_unstemmed | Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactions |
| title_short | Catalytic performance of CoMoW Sulfide catalysts supported on hierarchically structured porous silicas for HDS reactions |
| title_sort | catalytic performance of comow sulfide catalysts supported on hierarchically structured porous silicas for hds reactions |
| topic | Monolithic Silica materials CoMoW-S catalysts Hydrodesulfurization |
| url | http://www.sciencedirect.com/science/article/pii/S2666821123000121 |
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