Synthesis Method and Principle of Octahedral Hierarchical LTA Zeolite and Its Application to Enhance Catalytic Activity in Styrene Epoxidation.

ABSTRACT: A 4 Å zeolite prepared under the synergistic effect of intense ultrasound and a high-voltage electrostatic field had an octahedral structure rather than a conventional hexahedral structure. XPS and XRD analyses showed that the ratio of silicon to aluminum, 2θ peak position, and the corresponding crystal planes were the same as those in traditional hexahedral 4 Å zeolite, but some crystal planes were more prominent. SEM imaging showed that the octahedral zeolites had a larger particle size. Porosimetry (BET surface area and BJH analysis) showed that the octahedral zeolite had become a mesoporous zeolite, and its specific surface area increased and its pore size expanded, which was conducive to loading catalytically active materials and thus improving its catalytic performance. In this paper

SUBMITTER: Wang J 

PROVIDER: S-EPMC11425629 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature