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Article

Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation

by
Ralitsa Velinova
,
Anton Naydenov
,
Diana Kichukova
,
Ventsislav Tumbalev
,
Genoveva Atanasova
,
Daniela Kovacheva
* and
Ivanka Spassova
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
*
Author to whom correspondence should be addressed.
Catalysts 2023, 13(8), 1224; https://doi.org/10.3390/catal13081224
Submission received: 12 July 2023 / Revised: 17 August 2023 / Accepted: 18 August 2023 / Published: 20 August 2023
(This article belongs to the Special Issue Catalytic Combustion - From Laboratory Tests to Practical Applications)
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Abstract

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 N2-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.
Keywords: complete VOCs oxidation; RGO; palladium; kinetics of toluene oxidation; mechanism complete VOCs oxidation; RGO; palladium; kinetics of toluene oxidation; mechanism
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MDPI and ACS Style

Velinova, R.; Naydenov, A.; Kichukova, D.; Tumbalev, V.; Atanasova, G.; Kovacheva, D.; Spassova, I. Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation. Catalysts 2023, 13, 1224. https://doi.org/10.3390/catal13081224

AMA Style

Velinova R, Naydenov A, Kichukova D, Tumbalev V, Atanasova G, Kovacheva D, Spassova I. Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation. Catalysts. 2023; 13(8):1224. https://doi.org/10.3390/catal13081224

Chicago/Turabian Style

Velinova, Ralitsa, Anton Naydenov, Diana Kichukova, Ventsislav Tumbalev, Genoveva Atanasova, Daniela Kovacheva, and Ivanka Spassova. 2023. "Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation" Catalysts 13, no. 8: 1224. https://doi.org/10.3390/catal13081224

APA Style

Velinova, R., Naydenov, A., Kichukova, D., Tumbalev, V., Atanasova, G., Kovacheva, D., & Spassova, I. (2023). Highly Efficient RGO-Supported Pd Catalyst for Low Temperature Hydrocarbon Oxidation. Catalysts, 13(8), 1224. https://doi.org/10.3390/catal13081224

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