Ni(0) Ex-Phyllosilicates as Efficient and Stable Low Temperature CH4 Dry Reforming Catalyst

This study explores the performances of nickel-based materials for the dry reforming of methane (DRM), an important process for hydrogen and syngas productions. Ni nanoparticles are issued from porous phyllosilicate phase exolution under reducing conditions (in situ or ex situ). Phyllosilicate precursors were obtained by deposition/precipitation with urea onto SBA-15 porous silica, with metal loading up to 40 wt.%. Reaction was performed at 600-700 & DEG;C. The successful formation and stabilization of highly dispersed nanoparticles (2-6 nm) is revealed, even for highly loaded formulations (20 wt.% and 40 wt.%). In DRM-700 (CH4/CO2=1, 20 % CH4, 480,000 mL g(cat)(-1) h(-1)) the formulation at 20 wt.% metal loading (Ni_20 %) activated during reaction affords 50 % and 65 % of CH4 and CO2 conversions respectively at 700 & DEG;C. Ni_20 % is showing excellent resistance toward sintering after DRM stability test of 80 h. Characterizations made for spent catalyst show high resistance toward sintering and limited carbon formation.

Automated summary

This study investigates the use of nickel-based materials in the dry reforming of methane, an important process for producing hydrogen and syngas. Ni nanoparticles are formed from porous phyllosilicates under reducing conditions. The nanoparticles are highly dispersed even at high metal loadings, and show excellent resistance to sintering and carbon formation. The results demonstrate the potential of these materials for DRM applications.