화학공학소재연구정보센터
Applied Catalysis A: General, Vol.530, 111-124, 2017
Manipulating ceria-titania binary oxide features and their impact as nickel catalyst supports for low temperature steam reforming of methane
Mixed oxides of titanium with cerium were examined for the impact of their reducible oxide properties as a support for nickel-catalysed low temperature steam reforming of methane. Modifications to characteristics of the mixed oxide supports were obtained by varying the relative cerium/titanium composition and utilising different synthesis routes. Sol-gel and flame spray pyrolysis synthesis techniques were employed to achieve this purpose. The sol-gel-prepared supports exhibited improved methane conversion rates with an increased presence of cerium within the support while the catalysts with flame-made supports demonstrated poor stability upon incorporation of cerium at certain ratios. Despite the consistent high surface area and fine nickel dispersion across all flame-synthesised supports, the findings revealed that while these attributes are beneficial for steam reforming catalysis, they do not necessarily assure effective conversions. In addition to the above qualities, the sol-gel-synthesised materials demonstrated that crystalline features of the support also play a vital role in maintaining stable conversions at 500 degrees C. (C) 2016 Elsevier B.V. All rights reserved.