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Hydrogen production from supercritical water reforming of glycerol over Ni/Al2O3–SiO2 catalyst

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  • Gutiérrez Ortiz, F.J.
  • Campanario, F.J.
  • Aguilera, P.G.
  • Ollero, P.

Abstract

Hydrogen production from the supercritical water reforming of glycerol was studied in a tubular fixed-bed reactor by using a Ni-based catalyst supported on Al2O3 and SiO2. Tests were carried out at a pressure of 240 bar, temperatures of 500–800 °C, glycerol feed concentrations of 5–30 wt.%, and weight hourly space velocity from 1.25 to 22.5 gGly h−1 gCat−1 (residence time from 1.6 to 4.8 s through the bed). The dry gas is mainly composed of H2, CO2, CO, CH4. The results showed that the glycerol conversion was almost complete, except at the highest glycerol feed concentration and lowest temperature. Hydrogen yields were very close to those values predicted by equilibrium at a short residence time. Nickel on catalyst was completely reduced, and structured carbon nanotubes were encountered at glycerol concentrations higher than 20 wt.%. This study illustrates that the reforming of glycerol using supercritical water over a Ni catalyst makes it possible to reduce the reforming temperature needed when no catalyst is used (from 800 °C to 600 °C), achieving a high-yield hydrogen production, very close to equilibrium, and requiring less energy.

Suggested Citation

  • Gutiérrez Ortiz, F.J. & Campanario, F.J. & Aguilera, P.G. & Ollero, P., 2015. "Hydrogen production from supercritical water reforming of glycerol over Ni/Al2O3–SiO2 catalyst," Energy, Elsevier, vol. 84(C), pages 634-642.
  • Handle: RePEc:eee:energy:v:84:y:2015:i:c:p:634-642
    DOI: 10.1016/j.energy.2015.03.046
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    References listed on IDEAS

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    1. Gutiérrez Ortiz, F.J. & Serrera, A. & Galera, S. & Ollero, P., 2013. "Experimental study of the supercritical water reforming of glycerol without the addition of a catalyst," Energy, Elsevier, vol. 56(C), pages 193-206.
    2. Guo, Y. & Wang, S.Z. & Xu, D.H. & Gong, Y.M. & Ma, H.H. & Tang, X.Y., 2010. "Review of catalytic supercritical water gasification for hydrogen production from biomass," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(1), pages 334-343, January.
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    2. Xu, Jialing & Rong, Siqi & Sun, Jingli & Peng, Zhiyong & Jin, Hui & Guo, Liejin & Zhang, Xiang & Zhou, Teng, 2022. "Optimal design of non-isothermal supercritical water gasification reactor: From biomass to hydrogen," Energy, Elsevier, vol. 244(PB).
    3. Lin, Junhao & Sun, Shichang & Cui, Chongwei & Ma, Rui & Fang, Lin & Zhang, Peixin & Quan, Zonggang & Song, Xin & Yan, Jianglong & Luo, Juan, 2019. "Hydrogen-rich bio-gas generation and optimization in relation to heavy metals immobilization during Pd-catalyzed supercritical water gasification of sludge," Energy, Elsevier, vol. 189(C).
    4. Schwengber, Carine Aline & Alves, Helton José & Schaffner, Rodolfo Andrade & da Silva, Fernando Alves & Sequinel, Rodrigo & Bach, Vanessa Rossato & Ferracin, Ricardo José, 2016. "Overview of glycerol reforming for hydrogen production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 259-266.
    5. Gutiérrez Ortiz, F.J. & Campanario, F.J. & Aguilera, P.G. & Ollero, P., 2016. "Supercritical water reforming of glycerol: Performance of Ru and Ni catalysts on Al2O3 support," Energy, Elsevier, vol. 96(C), pages 561-568.
    6. Mohsin Raza & Abrar Inayat & Basim Abu-Jdayil, 2021. "Crude Glycerol as a Potential Feedstock for Future Energy via Thermochemical Conversion Processes: A Review," Sustainability, MDPI, vol. 13(22), pages 1-27, November.
    7. Wang, Cui & Li, Linfeng & Chen, Yunan & Ge, Zhiwei & Jin, Hui, 2021. "Supercritical water gasification of wheat straw: Composition of reaction products and kinetic study," Energy, Elsevier, vol. 227(C).

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