Synthesis of Thermally Stable MCM-41 at Ambient Temperature
Journal
Journal of the Chinese Chemical Society
Journal Volume
43
Journal Issue
5
Pages
375-378
Date Issued
1996
Author(s)
Abstract
Abstract A new process to synthesize thermally stable mesoporous molecular sieves of MCM‐41 structure based on delayed neutralization at ambient temperature was investigated. All samples synthesized by this new method have BET surface areas of about 1100m 2 /g and possess high thermal stability up to 900°C. Higher crystallinity and less lattice constriction after calcination were observed for samples with a longer aging period. Those samples with aging time longer than 10 days exhibited four characteristic XRD peaks of MCM‐41 both before and after calcination at 560°C. The N 2 adsorption‐desorption isotherms of the calcined samples showed larger average pore size and more homogenous pore size distribution. The method was also successfully applied to the synthesis of MCM‐41 with different surfactants of hydrocarbon length with 10–18 carbons and proves to be a simple route for obtaining thermally stable MCM‐41 at room temperature.
Type
journal article