Solvothermal Synthesis of FDU-12 Derived Ni-Phyllosilicate Using Double Solvent of H2O and n-Pentane

In order to inhibit the serious damage of pore structure of silica template during the conventional hydrothermal method to prepare Ni-phyllosilicate material, a solvothermal method using double solvent, a small amount of water and a large amount of hydrophobic n-pentane, was proposed to synthesize FDU-12 derived Ni-phyllosilicate in this work. Water can infiltrate the inside channels of FDU-12 owing to more hydrophilic silica hydroxyl groups, and the hydrophobic n-pentane tends to surround the outside of FDU-12. The growth of Ni-phyllosilicate occured only inside channels rather than surface, and the addition of urea could improve its formation at 180 degrees C in 12 h. As a result, the optimal catalyst retained the pore structure of FDU-12 and obtained fine Ni particle size of 1.5 nm after 750 degrees C reduction in H-2 flow, which exhibited CO2 conversion of 77.0% and CH4 selectivity of 94.7% at 450 degrees C, 60 L center dot g(-1)center dot h(-1). In addition, this catalyst showed high long-term stability in a 100 h-lifetime test with high anti-sintering property derived from Ni-phyllosilicate. [GRAPHICS] .