Surface characterization of borated γ-alumina by using proton affinity distributions
Borated aluminas with different boria contents (2, 3, 5 and 8 wt.% B2O3) were prepared to be used as supports for hydrotreating CoMo catalysts. The borated aluminas were characterized by proton affinity distributions (PAD) to obtain information about changes caused by boron introduction in the surf...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidad de Antioquia
2013-02-01
|
| Series: | Revista Facultad de Ingeniería Universidad de Antioquia |
| Subjects: | |
| Online Access: | https://revistas.udea.edu.co/index.php/ingenieria/article/view/14640 |
| _version_ | 1797861605568937984 |
|---|---|
| author | David de Jesús Pérez Martínez Guillermo Andrés Acevedo Quiroga Sonia Azucena Giraldo Duarte Aristóbulo Centeno Hurtado |
| author_facet | David de Jesús Pérez Martínez Guillermo Andrés Acevedo Quiroga Sonia Azucena Giraldo Duarte Aristóbulo Centeno Hurtado |
| author_sort | David de Jesús Pérez Martínez |
| collection | DOAJ |
| description |
Borated aluminas with different boria contents (2, 3, 5 and 8 wt.% B2O3) were prepared to be used as supports for hydrotreating CoMo catalysts. The borated aluminas were characterized by proton affinity distributions (PAD) to obtain information about changes caused by boron introduction in the surface hydroxyl groups. The later being the sites by means of Mo and Co are anchored to the support. Two new peaks, which cannot be attributed to alumina hydroxyl groups, were found in the PAD profiles of borated aluminas. These two new peaks increased with increasing boria loading, even, in the PAD profile of the alumina with 8 wt.% B2O3 almost no other peaks were present. By comparing PAD profiles with FT-IR spectra of both the OH stretching (3900-3400 cm-1) and the skeletal (under 2000 cm-1) regions, it was possible to assign these new peaks to hydroxyls linked to trigonal and tetrahedral borated species, respectively. Thus, it could be inferred that boria OH groupsprogressively replaced alumina ones with increasing boria content forming a cover layer. Trigonal borated species were always predominant, however the relative population of tetrahedral species increased with increasing boria content.
|
| first_indexed | 2024-04-09T22:06:55Z |
| format | Article |
| id | doaj.art-2828fa873b354174afabb524323307b8 |
| institution | Directory Open Access Journal |
| issn | 0120-6230 2422-2844 |
| language | English |
| last_indexed | 2024-04-09T22:06:55Z |
| publishDate | 2013-02-01 |
| publisher | Universidad de Antioquia |
| record_format | Article |
| series | Revista Facultad de Ingeniería Universidad de Antioquia |
| spelling | doaj.art-2828fa873b354174afabb524323307b82023-03-23T12:36:14ZengUniversidad de AntioquiaRevista Facultad de Ingeniería Universidad de Antioquia0120-62302422-28442013-02-015710.17533/udea.redin.14640Surface characterization of borated γ-alumina by using proton affinity distributionsDavid de Jesús Pérez Martínez0Guillermo Andrés Acevedo Quiroga1Sonia Azucena Giraldo Duarte2Aristóbulo Centeno Hurtado3Industrial University of SantanderIndustrial University of SantanderIndustrial University of SantanderIndustrial University of Santander Borated aluminas with different boria contents (2, 3, 5 and 8 wt.% B2O3) were prepared to be used as supports for hydrotreating CoMo catalysts. The borated aluminas were characterized by proton affinity distributions (PAD) to obtain information about changes caused by boron introduction in the surface hydroxyl groups. The later being the sites by means of Mo and Co are anchored to the support. Two new peaks, which cannot be attributed to alumina hydroxyl groups, were found in the PAD profiles of borated aluminas. These two new peaks increased with increasing boria loading, even, in the PAD profile of the alumina with 8 wt.% B2O3 almost no other peaks were present. By comparing PAD profiles with FT-IR spectra of both the OH stretching (3900-3400 cm-1) and the skeletal (under 2000 cm-1) regions, it was possible to assign these new peaks to hydroxyls linked to trigonal and tetrahedral borated species, respectively. Thus, it could be inferred that boria OH groupsprogressively replaced alumina ones with increasing boria content forming a cover layer. Trigonal borated species were always predominant, however the relative population of tetrahedral species increased with increasing boria content. https://revistas.udea.edu.co/index.php/ingenieria/article/view/14640aluminaboronproton affinity distribution (PAD)infraredhydroxyls |
| spellingShingle | David de Jesús Pérez Martínez Guillermo Andrés Acevedo Quiroga Sonia Azucena Giraldo Duarte Aristóbulo Centeno Hurtado Surface characterization of borated γ-alumina by using proton affinity distributions Revista Facultad de Ingeniería Universidad de Antioquia alumina boron proton affinity distribution (PAD) infrared hydroxyls |
| title | Surface characterization of borated γ-alumina by using proton affinity distributions |
| title_full | Surface characterization of borated γ-alumina by using proton affinity distributions |
| title_fullStr | Surface characterization of borated γ-alumina by using proton affinity distributions |
| title_full_unstemmed | Surface characterization of borated γ-alumina by using proton affinity distributions |
| title_short | Surface characterization of borated γ-alumina by using proton affinity distributions |
| title_sort | surface characterization of borated γ alumina by using proton affinity distributions |
| topic | alumina boron proton affinity distribution (PAD) infrared hydroxyls |
| url | https://revistas.udea.edu.co/index.php/ingenieria/article/view/14640 |
| work_keys_str_mv | AT daviddejesusperezmartinez surfacecharacterizationofboratedgaluminabyusingprotonaffinitydistributions AT guillermoandresacevedoquiroga surfacecharacterizationofboratedgaluminabyusingprotonaffinitydistributions AT soniaazucenagiraldoduarte surfacecharacterizationofboratedgaluminabyusingprotonaffinitydistributions AT aristobulocentenohurtado surfacecharacterizationofboratedgaluminabyusingprotonaffinitydistributions |