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Screening of commercial catalysts for steam reforming of olive mill wastewater

Author

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  • Rocha, Cláudio
  • Soria, M.A.
  • Madeira, Luís M.

Abstract

Olive mill wastewater (OMW) is a pollutant effluent of the olive oil production. To reduce the environmental impact of this agro-industrial sector, with simultaneous valorization of such waste, the steam reforming of OMW was studied in this work. Besides the reduction of pollution resulting from OMW, the process allows producing “green” H2. In this study, several commercial catalysts (Ni-, Cu–Zn- and noble metal-based) were tested to compare their performances. A catalytic screening study with all the commercial catalysts was performed, and stability tests were conducted with the material that demonstrated higher activity (Rh-based catalyst). The physicochemical characterization of the fresh and spent materials was realized through several techniques (temperature-programmed reduction, temperature-programmed oxidation, transmission electron microscopy, temperature-programmed desorption of CO2, temperature-programmed desorption of NH3, chemisorption of H2, scanning electron microscopy with energy dispersive spectroscopy and physical adsorption of N2 at −196 °C). Although there are some materials with good catalytic performance, the Rh-based sample stood out during the tests, exhibiting high catalytic activity and high stability: at 400 °C the H2 yield (over 9 molH2·molOMW−1) and total organic carbon (TOC) conversion (>98%) were high along all the 24 h of the stability test.

Suggested Citation

  • Rocha, Cláudio & Soria, M.A. & Madeira, Luís M., 2021. "Screening of commercial catalysts for steam reforming of olive mill wastewater," Renewable Energy, Elsevier, vol. 169(C), pages 765-779.
    • Handle: RePEc:eee:renene:v:169:y:2021:i:c:p:765-779
    DOI: 10.1016/j.renene.2020.12.139
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    References listed on IDEAS

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    1. Cheng, Yoke Wang & Khan, Maksudur R. & Ng, Kim Hoong & Wongsakulphasatch, Suwimol & Cheng, Chin Kui, 2019. "Harnessing renewable hydrogen-rich syngas from valorization of palm oil mill effluent (POME) using steam reforming technique," Renewable Energy, Elsevier, vol. 138(C), pages 1114-1126.
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    1. Carvalho, João & Nogueira, Anabela & Castro-Silva, Sérgio & Rocha, Cláudio & Madeira, Luís M., 2023. "Process simulation and techno-economic analysis of olive oil mill wastewater steam reforming," Energy, Elsevier, vol. 278(PB).
    2. Alfredo Crialesi & Barbara Mazzarotta & Marco Santalucia & Fabrizio Di Caprio & Alfonso Pozio & Alessia Santucci & Luca Farina, 2022. "Exploiting Olive Mill Wastewater via Thermal Conversion of the Organic Matter into Gaseous Biofuel—A Case Study," Energies, MDPI, vol. 15(8), pages 1-14, April.
    3. Cerqueira, Pedro & Soria, M.A. & Madeira, Luis M., 2023. "Valorization of olive mill wastewater via autothermal reforming for hydrogen production," Renewable Energy, Elsevier, vol. 219(P2).
    4. Macedo, M. Salomé & Soria, M.A. & Madeira, Luis M., 2021. "Process intensification for hydrogen production through glycerol steam reforming," Renewable and Sustainable Energy Reviews, Elsevier, vol. 146(C).
    5. Rocha, Cláudio & Soria, M.A. & Madeira, Luís M., 2022. "Use of Ni-containing catalysts for synthetic olive mill wastewater steam reforming," Renewable Energy, Elsevier, vol. 185(C), pages 1329-1342.

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