Valorization of industrial by-products into porous materials for energy and environmental applications

- C. HUREL -
 

Water purification using industrial waste: when waste recovery and green chemistry serve the circular economy.

SEM image of lavandin hydrochar
SEM image of lavandin hydrochar SEM image of lavandin hydrochar
 

Academy Highlight

This project contributes to the Academy 3 theme “Environmental challenges related to energy and resources” by proposing to use biomass waste from the cosmetics/fragrance industry to produce energy, and by developing a method for the chemical and organic depollution of water through absorbent materials.

The project

Waste recycling is a major economic and ecological challenge for today's society. It helps to limit the depletion of natural resources and also limits waste volumes and encourages the transition from a linear to a circular economy. Against this backdrop, the Vaporee project led by Charlotte Hurel, is investigating ways of recycling industrial waste, with the aim of obtaining porous adsorbent materials (known as hydrochars). Once transformed, recycled industrial waste can be used for environmental or energy applications. To achieve this objective, the research team acquired a TRISTAR II specific surface and mesoporosity analyzer, an instrument used for calculating the absorbent potential of a material, a crucial piece of data when it comes to water decontamination. The project focuses more particularly on a waste product from the cosmetics/perfume industry: lavender waste. After the essential oils have been extracted by the industry, lavender waste is recovered, heated until carbonaceous materials are obtained, then tested using a specific surface area analyzer. Perfect control of heating time and temperature is essential to successfully prepare the perfect absorbent material. These parameters vary from one material to another, and are particularly important for lavender. The entire material production chain is optimized for energy consumption, in line with the Vaporee project's sustainable development approach. After treatment, and given the material's remarkable adsorption capacities, there are two possible recycling options:
  • The first would be to compact the material into pellets ready for combustion for domestic heating.
  • The second would be to use it as a depolluting material to clean water contaminated by heavy metals, antibiotics or organic matter.
Compaction and adsorption tests carried out on materials derived from lavender waste have been highly convincing. It is now up to industry to commercialize the cost-efficient and environmentally-friendly materials developed by the Vaporee project.
1)	Scheme of the HTC process that produces hydrochar
1) Scheme of the HTC process that produces hydrochar 1) Scheme of the HTC process that produces hydrochar
2)	Scheme of methylene blue (MB) removal using hydrochar
2) Scheme of methylene blue (MB) removal using hydrochar 2) Scheme of methylene blue (MB) removal using hydrochar

The +

The Vaporee project focuses on the values of the circular economy by recycling industrial waste from the Côte d'Azur region. It goes even further, proposing innovative depolluting solutions using this waste.

What's next ?

Based on the first results, the project team will be looking at other materials for testing and recycling. More specifically, in 2024, the laboratory will host a doctoral student who will study depollution systems applied to Vietnamese aquaculture.

Project informations

Scientific field:
Material Sciences
Environmental chemistry
Keywords:
Waste recycling
Hydrochars
Adsorption
Pollution control
Circular economy
Project member:
Charlotte Hurel
Budget
€43,500, including €7,000 from Academy 3
PI laboratory:
INPHYNI - Université Côte d’Azur, CNRS
Students involved:
Sumeyra Seniha Baran
Xin Li
 

Charlotte Hurel

INPHYNI - Université Côte d’Azur, CNRS

Scientific promotion of the project

  1. Li, X., Baran, S. S., Orange, F., Bonjour, E., Jame, P., Verger-Dubois, G., ... & Hurel, C. (2022). Conversion of Lavandula Straw into High-Quality Solid Fuel: Effect of Hydrothermal Carbonization Conditions on Fuel Characteristics. BioEnergy Research, 1-17.
  2. Li X., Bonjour E., Jame P., Kuzhir P., Hurel C. (2023) Production of hydrochar from biomass waste as economical adsorbents for methylene blue – insight of occurring adsorption phenomena. Biomass Conversion and Biorefinery. https://doi.org/10.1007/s13399-023-04122-y