Electrochemistry for biofuels waste valorization: vinasse as a reducing agent for Pt/C and its application to the electrolysis of glycerin and vinasse
| Autor: | Suzana M.L. de Oliveira Marcionilio, José A. Dias, José J. Linares, Fernando M. de Lino Amorim, Rudy Crisafulli, Brenda R.S. de Araújo, William Mendes Cunha |
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| Rok vydání: | 2019 |
| Předmět: |
Hydrogen
Reducing agent Electrolytic cell Vinasse chemistry.chemical_element Hidrogênio 02 engineering and technology 010402 general chemistry Electrocatalyst Electrochemistry 01 natural sciences law.invention lcsh:Chemistry chemistry.chemical_compound law Glycerol Electrolysis Eletroquímica Chemistry Catalisadores Valorização de resíduos Glicerina 021001 nanoscience & nanotechnology 0104 chemical sciences Vinhaça lcsh:Industrial electrochemistry lcsh:QD1-999 Chemical engineering 0210 nano-technology lcsh:TP250-261 |
| Zdroj: | Repositório Institucional da UnB Universidade de Brasília (UnB) instacron:UNB Electrochemistry Communications, Vol 102, Iss, Pp 25-30 (2019) |
| Popis: | Waste vinasse has been used, for the first time, as a reducing agent to prepare a 20 wt% Pt/C electrocatalyst. After alkalization and subsequent filtration, abundant cations such as Ca, Mg and Fe were effectively removed, precipitating as hydroxides and insoluble phosphates. Pt chemical reduction was carried out under reflux in the presence of Vulcan XC-72R carbon by the action of reductive species such as sugars and phenols present. Reduction was confirmed by thermal analysis and X-ray diffractograms displaying the typical Pt fcc structure formed by nanocrystals. In the transmission images, an irregular dispersion of the Pt nanoparticles was observed on the carbon support, with the presence of large agglomerations with a cotton-like structure. This structure was found to be very active for glycerol electrolysis in an alkaline membrane electrolysis cell, comparable to commercial materials. Finally, results for electrolysis of the vinasse were also presented, demonstrating the possibility of valorizing this residue by the production of hydrogen. Keywords: Waste valorization, Vinasse, Glycerin, Electrochemical reforming, Hydrogen, Electrocatalyst |
| Databáze: | OpenAIRE |
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