Manipulating ceria-titania binary oxide features and their impact as nickel catalyst supports for low temperature steam reforming of methane

作者：Kho Ee Teng; Lovell Emma; Wong Roong Jien; Scott Jason^*; Amal Rose^*

来源：Applied Catalysis A: General , 2017, 530: 111-124.

DOI：10.1016/j.apcata.2016.11.019

• Steam reforming
• Methane
• Nickel
• Ceria
• Titania

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.

• 出版日期2017-1-25