Preparation of Vermiculite-based Molecular Sieve-Supported Ni-Co Alloy Catalyst Assisted by Oleic Acid and Application in Dry Reforming of Methane

Abstract

In this work, microporous vermiculite-based molecular sieves were etched into mesoporous vermiculite-based molecular sieves by alkaline solution, and the mesoporous vermiculite-based molecular sieves were supported by Ni or Ni-Co alloy active components by oleic acid-assisted method and impregnation method, respectively. And prepared catalysts were applied to the dry reforming of methane (DRM) reaction. Under the reaction conditions of T=750 °C and GHSV=30000 mL/(h gcat), the conversion rate of CO2 and CH4 of the Ni-Co-oa/VSiO2 bimetallic catalyst reached 84.7 % and 71.9 %, respectively. According to the analysis of the relevant characterization results, the Ni-Co-oa/VSiO2 catalyst has more nickel active sites and stronger interaction between metal and support due to the addition of oleic acid. Therefore, Ni-Co-oa/VSiO2 has better catalytic reactivity and stability.