Operational conditions affecting hydrogen production by the photoreforming of organic compounds using titania nanoparticles with gold
| Autor: | Mauricio Isaacs, Felipe Varas-Concha, César Sáez-Navarrete, Diego Guzmán |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Hydrogen Nanoparticle chemistry.chemical_element Alcohol Electron donor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound General Energy chemistry Chemical engineering Titanium dioxide Photocatalysis 0210 nano-technology Hydrogen production |
| Zdroj: | Energy Technology Artículos CONICYT CONICYT Chile instacron:CONICYT |
| Popis: | Several factors affect photocatalytic hydrogen productivity from the photoreforming of organic compounds, which makes it difficult to optimize operational conditions in photoreactors. To prioritize these factors, we focused on the quantification of the effect of five of them on hydrogen production. Photocatalytic experiments were performed on 67 mL batch photoreactors under UV-LED lamps (λ=375 nm) using a suspension of TiO2–Au nanoparticles synthesized by a sol–gel approach. The analyzed factors were: (A) presence of Au as a cocatalyst, (B) type of alcohol as the electron donor, (C) intensity of UV light, (D) electron donor concentration, and (E) nanoparticle concentration. A main and interaction effects analysis is presented with reduced fixed effect models for three responses: total hydrogen generation, catalyst productivity, and electron donor productivity. The presence of Au as a cocatalyst (A), the intensity of UV light (C), and their interaction (AC) were the factors with the highest effect. The best configuration allowed us to reach a catalyst productivity of 2925 μmolH2 g−1 h−1. |
| Databáze: | OpenAIRE |
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