- Date de réalisation : 17 Juin 2021
- Durée du programme : 23 min
- Classification Dewey : Chimie et sciences connexes
Dans la même collectionJuan Matos - H2 production on 1D and 2D Carbon-containing Fe-, Co, and Ni-based foamy catalysts. Athanasios G. Konstandopoulos - Material and Reactor Technologies for Solar Fuels Pascal Brault - Reactive molecular dynamics simulations of H2 production and conversion Olivier Joubert - Brief Overview of Current French Hydrogen Research Activities, Focus on Materials Ally Aukaloo - From molecular to nanostructured materials for artificial photosynthesis Giuseppe Marci - Photocatalytic reduction of CO2 in gas-solid and in liquid-solid regimes
Sixto Malato - Solar photocatalytic hydrogen production at pilot scale
Solar energy is well-recognized as a sustainable and clean energy source. Among the various approaches to solar energy conversion, solar-driven hydrogen production is one of the most promising ways to convert solar energy into hydrogen, a storable fuel. Hydrogen is undoubtedly one of the most attractive renewable alternatives to fossil fuels for a number of reasons: (i) hydrogen can be safely stored; (ii) it is an excellent energy carrier since it can store 3 times as much energy as conventional natural gas; (iii) its combustion is environmentally friendly (no release of greenhouse gases or hazardous by-products). However, the production of hydrogen currently relies in steam reforming of CH4 and CO, and thus, involves the consumption of fossil fuel energy and the emission of greenhouse gases. There are efforts to find alternative renewable technologies to produce hydrogen, the so-called green hydrogen.
It is well-known that the efficiency of heterogeneous photocatalysis for hydrogen generation from water splitting is quite low. The efficiency of photocatalysis hydrogen generation can be improved by using aqueous sacrificial agents (organic electron donors) dissolved in water. Industrial wastewater containing high concentrations of methanol/glycerol/formic acid have been used as feedstock. Effluents from municipal wastewaters could also be used, as they would contain dozens of mg/L of organic load. This means that in a simultaneous process, hydrogen generation and contaminants removal can take place. It is important to notice that the application of this technology has a double purpose: first, to produce a clean fuel such as hydrogen and, second, to treat, reduce the organic load and decontaminate wastewater in certain extent.