Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivity
Catalysts based on Pd/In were prepared through the wet impregnation method using Al2O3, SiO2, and TiO2 as supports. The impact of the synthesis procedure on N2 selectivity was studied. Characterization was performed using X-ray fluorescence and scanning electron microscopy–energy dispersive spectros...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-02-01
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| Series: | Water Supply |
| Subjects: | |
| Online Access: | http://ws.iwaponline.com/content/23/2/526 |
| _version_ | 1797850639163719680 |
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| author | Nicolas Alejandro Sacco Fernanda Miranda Zoppas Vanina Aghemo Thiago Beltrame Fernanda Albana Marchesini |
| author_facet | Nicolas Alejandro Sacco Fernanda Miranda Zoppas Vanina Aghemo Thiago Beltrame Fernanda Albana Marchesini |
| author_sort | Nicolas Alejandro Sacco |
| collection | DOAJ |
| description | Catalysts based on Pd/In were prepared through the wet impregnation method using Al2O3, SiO2, and TiO2 as supports. The impact of the synthesis procedure on N2 selectivity was studied. Characterization was performed using X-ray fluorescence and scanning electron microscopy–energy dispersive spectroscopy analysis. The catalytic performance of these materials was evaluated for nitrate removal from water in a batch reactor. The order of better nitrate removal was found to be Al2O3>TiO2>SiO2. The selectivity towards N2 was also impacted by the support used, with Al2O3-based catalysts being the most selective and TiO2-based the least due to strong metal–support interaction. The synthesis stages also impacted nitrate removal efficiency and selectivity, with the highest N2 selectivity (94.4% at 90% nitrate conversion) found in catalysts where In was added after Pd and underwent intermediate calcination, reduction and final reduction stages.
HIGHLIGHTS
Pd,In-based catalysts were prepared on different supports by varying sequential synthesis steps aiming for higher N2 selectivity in nitrate reduction.;
Total nitrate conversion was obtained using Pd,In/Al2O3 and Pd,In/TiO2.;
The catalytic performance was influenced by the support used in the synthesis.;
Pd,In/Al2O3 was the most selective to N2.;
PACRIR synthesis was the most suitable for the catalytic removal of nitrate from water.; |
| first_indexed | 2024-04-09T19:03:34Z |
| format | Article |
| id | doaj.art-53c64742bdad409d9bf2b827e91436f9 |
| institution | Directory Open Access Journal |
| issn | 1606-9749 1607-0798 |
| language | English |
| last_indexed | 2024-04-09T19:03:34Z |
| publishDate | 2023-02-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Supply |
| spelling | doaj.art-53c64742bdad409d9bf2b827e91436f92023-04-07T15:14:32ZengIWA PublishingWater Supply1606-97491607-07982023-02-0123252654510.2166/ws.2023.019019Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivityNicolas Alejandro Sacco0Fernanda Miranda Zoppas1Vanina Aghemo2Thiago Beltrame3Fernanda Albana Marchesini4 Instituto de Investigaciones en Catálisis y Petroquímica (INCAPE-CONICET), Santiago del Estero 2829, Santa Fe, Argentina Instituto de Investigaciones en Catálisis y Petroquímica (INCAPE-CONICET), Santiago del Estero 2829, Santa Fe, Argentina Instituto de Investigaciones en Catálisis y Petroquímica (INCAPE-CONICET), Santiago del Estero 2829, Santa Fe, Argentina Laboratório de Corrosão, Proteção e Reciclagem de Materiais LACOR-UFRGS (Universidade Federal do Rio Grande do Sul), Av. Bento Gonçalves, 9500, Porto Alegre, RS, Brazil Instituto de Investigaciones en Catálisis y Petroquímica (INCAPE-CONICET), Santiago del Estero 2829, Santa Fe, Argentina Catalysts based on Pd/In were prepared through the wet impregnation method using Al2O3, SiO2, and TiO2 as supports. The impact of the synthesis procedure on N2 selectivity was studied. Characterization was performed using X-ray fluorescence and scanning electron microscopy–energy dispersive spectroscopy analysis. The catalytic performance of these materials was evaluated for nitrate removal from water in a batch reactor. The order of better nitrate removal was found to be Al2O3>TiO2>SiO2. The selectivity towards N2 was also impacted by the support used, with Al2O3-based catalysts being the most selective and TiO2-based the least due to strong metal–support interaction. The synthesis stages also impacted nitrate removal efficiency and selectivity, with the highest N2 selectivity (94.4% at 90% nitrate conversion) found in catalysts where In was added after Pd and underwent intermediate calcination, reduction and final reduction stages. HIGHLIGHTS Pd,In-based catalysts were prepared on different supports by varying sequential synthesis steps aiming for higher N2 selectivity in nitrate reduction.; Total nitrate conversion was obtained using Pd,In/Al2O3 and Pd,In/TiO2.; The catalytic performance was influenced by the support used in the synthesis.; Pd,In/Al2O3 was the most selective to N2.; PACRIR synthesis was the most suitable for the catalytic removal of nitrate from water.;http://ws.iwaponline.com/content/23/2/526catalytic nitrate removalpd–in/al2o3pd–in catalystspd–in/sio2pd–in/tio2 synthesis design |
| spellingShingle | Nicolas Alejandro Sacco Fernanda Miranda Zoppas Vanina Aghemo Thiago Beltrame Fernanda Albana Marchesini Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivity Water Supply catalytic nitrate removal pd–in/al2o3 pd–in catalysts pd–in/sio2 pd–in/tio2 synthesis design |
| title | Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivity |
| title_full | Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivity |
| title_fullStr | Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivity |
| title_full_unstemmed | Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivity |
| title_short | Pd/In-based catalysts for nitrate catalytic removal from water: synthesis designs aiming for better N2 selectivity |
| title_sort | pd in based catalysts for nitrate catalytic removal from water synthesis designs aiming for better n2 selectivity |
| topic | catalytic nitrate removal pd–in/al2o3 pd–in catalysts pd–in/sio2 pd–in/tio2 synthesis design |
| url | http://ws.iwaponline.com/content/23/2/526 |
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