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Synthesis of highly dispersed nanosized NiO/MgO-Al2O3 catalyst for the production of synthetic natural gas with enhanced activity and resistance to coke formation

Ebadi, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.iecr.8b01878
  3. Abstract:
  4. Nickel nanoparticles supported on MgO-Al2O3 and Al2O3 were synthesized by an impregnation method using dinitrobisethylenediamine nickel and nickel nitrate hexahydrate as precursors and were used as catalysts for CO methanation. Different MgO contents (1.5-11.25 wt %) were employed for the preparation of supports, and NiO loadings were in the range of 10-40 wt %. The optimum catalyst prepared from proper amounts of MgO (∼2 wt %) and NiO loading (20 wt %) with [Ni(en)2(H2O)2](NO3)2 as precursor and a mesoporous support with a wide range of mesopores resulted in highly dispersed nickel nanoparticles that exhibited moderate metal-support interactions, lower acidic surface sites, and enhanced performance over the entire range of operating conditions. The optimum catalyst also showed a high activity and resistance to coke formation and sintering as compared to catalysts prepared with either MgO or [Ni(en)2(H2O)2](NO3)2. Complete CO conversion could be achieved at 300 °C for this catalyst where other prepared catalysts had achieved about 60% CO conversion. © 2018 American Chemical Society
  5. Keywords:
  6. Alumina ; Aluminum oxide ; Coke ; Magnesia ; Metal nanoparticles ; Natural gasoline plants ; Nickel oxide ; Sintering ; Synthesis (chemical) ; Acidic surface ; Impregnation methods ; Mesoporous support ; Metal-support interactions ; Nickel nanoparticles ; Nickel nitrate ; Operating condition ; Synthetic natural gas ; Nanocatalysts
  7. Source: Industrial and Engineering Chemistry Research ; Volume 57, Issue 38 , 2018 , Pages 12700-12714 ; 08885885 (ISSN)
  8. URL: https://pubs.acs.org/doi/10.1021/acs.iecr.8b01878