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Synthesis of a new self-supported Mgy(CuxNi0.6-xMn0.4)1-yFe2O4 oxygen carrier for chemical looping steam methane reforming process

Nazari, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijhydene.2021.03.081
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. Novel self-supported Mgy(CuxNi0.6-xMn0.4)1-yFe2O4 with (y = 0, 0.05, 0.1, 0.15, and x = 0, 0.15, 0.3, 0.45, 0.6) oxygen carriers (OCs) are synthesized through the co-precipitation method. The synthesized OCs’ properties are characterized by X-ray powder diffraction (XRD), Raman spectra, transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), and Thermogravimetric Analysis (TGA). The synthesized OCs are assessed in Chemical Looping Steam Methane Reforming (CL-SMR) process subject to different mesh sizes, reaction temperatures, Steam/Carbon (S/C) molar ratios, Mg concentrations, and Cu and Ni concentrations. The characterization of the OCs and process results indicate the contributive effect of Mg incorporation on the CuxNi0.6-xMn0.4Fe2O4 support structure. The redox results reveal that Mg0.1(Cu0.3Ni0.3Mn0.4)0.9Fe2O4 OC is of the highest activity, even at low reduction temperatures. This OC exhibits the highest activity and stability with lowest coke deposition during 24 redox cycles at 650 °C and S/C = 2.5. The highest CH4 conversion of about 99.4% and H2 yield of about 84.4% are obtained. © 2021 Hydrogen Energy Publications LLC
  6. Keywords:
  7. Copper compounds ; Energy dispersive spectroscopy ; Field emission microscopes ; Fourier transform infrared spectroscopy ; High resolution transmission electron microscopy ; Hydrogen production ; Iron compounds ; Magnesium compounds ; Manganese compounds ; Methane ; Molar ratio ; Nickel compounds ; Precipitation (chemical) ; Scanning electron microscopy ; Steam ; Steam reforming ; Thermogravimetric analysis ; X ray powder diffraction ; Chemical looping ; Chemical looping steam methane reforming process ; Coprecipitation method ; H$-2$/ production ; High activity ; Iron-based oxygen carrier ; Methane reforming ; Oxygen Carrier ; Reforming process ; Synthesised ; Oxygen
  8. Source: International Journal of Hydrogen Energy ; Volume 46, Issue 37 , 2021 , Pages 19397-19420 ; 03603199 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0360319921009927