Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation
The work presents Pd-containing catalysts for practical application with enhanced low-temperature activity in the complete oxidation of volatile organic compounds (VOCs) using innovative combinations of reduced graphene oxide (RGO) and alumina. The catalysts were characterized by XRD, SEM, TEM, XPS,...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/13/8/1224 |
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| author | Ralitsa Velinova Anton Naydenov Diana Kichukova Ventsislav Tumbalev Genoveva Atanasova Daniela Kovacheva Ivanka Spassova |
| author_facet | Ralitsa Velinova Anton Naydenov Diana Kichukova Ventsislav Tumbalev Genoveva Atanasova Daniela Kovacheva Ivanka Spassova |
| author_sort | Ralitsa Velinova |
| collection | DOAJ |
| description | The work presents Pd-containing catalysts for practical application with enhanced low-temperature activity in the complete oxidation of volatile organic compounds (VOCs) using innovative combinations of reduced graphene oxide (RGO) and alumina. The catalysts were characterized by XRD, SEM, TEM, XPS, low-temperature N<sub>2</sub>-adsorption, and CO chemisorption. The tests on complete catalytic oxidation of different VOC (propane, butane, hexane, dimethyl ether, toluene, propylene) and CO were carried out. The reaction kinetics and the mechanism of the reaction of complete oxidation of toluene are being investigated in detail. The results show that the new catalyst design makes it able to completely oxidize the studied VOCs and CO at low temperatures (100–350 °C) with long-term stability. Using a variety of instrumental methods, it was established that for high activity and long-term stability, the optimal ratio Pd/PdO should be close to 1:1. The most probable mechanism of complete toluene oxidation is the mechanism of Langmuir–Hinshelwood. The high activity and the weak effect of water on the catalyst performance leads to further perspectives for the application of the currently developed approach for the preparation of large-scale monolithic catalytic systems for air pollution control. |
| first_indexed | 2024-03-11T00:03:24Z |
| format | Article |
| id | doaj.art-7a38bcc1976a44d3927f1e9646bafe0e |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T00:03:24Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-7a38bcc1976a44d3927f1e9646bafe0e2023-11-19T00:36:03ZengMDPI AGCatalysts2073-43442023-08-01138122410.3390/catal13081224Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon OxidationRalitsa Velinova0Anton Naydenov1Diana Kichukova2Ventsislav Tumbalev3Genoveva Atanasova4Daniela Kovacheva5Ivanka Spassova6Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaThe work presents Pd-containing catalysts for practical application with enhanced low-temperature activity in the complete oxidation of volatile organic compounds (VOCs) using innovative combinations of reduced graphene oxide (RGO) and alumina. The catalysts were characterized by XRD, SEM, TEM, XPS, low-temperature N<sub>2</sub>-adsorption, and CO chemisorption. The tests on complete catalytic oxidation of different VOC (propane, butane, hexane, dimethyl ether, toluene, propylene) and CO were carried out. The reaction kinetics and the mechanism of the reaction of complete oxidation of toluene are being investigated in detail. The results show that the new catalyst design makes it able to completely oxidize the studied VOCs and CO at low temperatures (100–350 °C) with long-term stability. Using a variety of instrumental methods, it was established that for high activity and long-term stability, the optimal ratio Pd/PdO should be close to 1:1. The most probable mechanism of complete toluene oxidation is the mechanism of Langmuir–Hinshelwood. The high activity and the weak effect of water on the catalyst performance leads to further perspectives for the application of the currently developed approach for the preparation of large-scale monolithic catalytic systems for air pollution control.https://www.mdpi.com/2073-4344/13/8/1224complete VOCs oxidationRGOpalladiumkinetics of toluene oxidationmechanism |
| spellingShingle | Ralitsa Velinova Anton Naydenov Diana Kichukova Ventsislav Tumbalev Genoveva Atanasova Daniela Kovacheva Ivanka Spassova Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation Catalysts complete VOCs oxidation RGO palladium kinetics of toluene oxidation mechanism |
| title | Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation |
| title_full | Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation |
| title_fullStr | Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation |
| title_full_unstemmed | Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation |
| title_short | Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation |
| title_sort | highly efficient rgo supported pd catalyst for low temperature hydrocarbon oxidation |
| topic | complete VOCs oxidation RGO palladium kinetics of toluene oxidation mechanism |
| url | https://www.mdpi.com/2073-4344/13/8/1224 |
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