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Aqueous-phase reforming of glycerol for production of alkanes over Ni/CexZr1-xO2 nano-catalyst: Effects of the support's composition

Bastan, F ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1016/j.renene.2017.02.076
  3. Publisher: Elsevier Ltd , 2017
  4. Abstract:
  5. The aqueous phase reforming (APR) reaction of glycerol considered to be environmentally green. It converted polyols into value added products including; H2 and alkanes. Ni species known for its capability of producing alkane-rich gas under the APR process conditions might be utilized for this purpose. In this research, the conversion of glycerol into alkanes demonstrated using 10wt% Ni/CexZr1-xO2 (with x = 0, 0.3, 0.5, 0.7 and 1) catalysts. In order to better understand the behavior of these materials, they were evaluated physio-chemically through the; XRD, BET, H2-TPR, H2-Chemisorption and TEM analyses. Moreover; performances of the synthesized materials were determined through their reactivity. Results revealed that, this variable depended strongly upon the Ce/Zr ratio in turn affecting the active metal dispersion, BET surface area and particle size distribution of prepared species. Amongst catalysts prepared, an optimum one with composition of 10wt% Ni/Ce0.3Zr0.7O2 was pinpointed. This showed the highest carbon content in the gaseous product (99%), highest alkane selectivity (40%) as well as; a minimum of 25 h of stability. Ultimately, it was concluded that, the overall catalytic performance of the prepared materials lowered in the following order: Ni/Ce0.3Zr0.7O2 > Ni/Ce0.5Zr0.5O2 > Ni/Ce0.7Zr0.3O2 > Ni/ZrO2 > Ni/CeO2. © 2017 Elsevier Ltd
  6. Keywords:
  7. Aqueous phase reforming ; Glycerol ; Nano-catalyst ; Ni/CeO2–ZrO2 ; Renewable alkanes ; Carbon ; Catalysts ; Cerium ; Dispersions ; Metals ; Paraffins ; Particle size ; Particle size analysis ; Aqueous-phase reforming ; BET surface area ; Catalytic performance ; Gaseous products ; Process condition ; Synthesized materials ; Value added products ; Nickel ; Alkane ; Catalyst ; Chemical composition ; Chemical compound ; Nanoparticle ; Physicochemical property ; Polymer ; Size distribution ; Sorption
  8. Source: Renewable Energy ; Volume 108 , 2017 , Pages 417-424 ; 09601481 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0960148117301623