title: Mechanochemical approach for selective deactivation of external surface acidity of ZSM-5 zeolite catalyst.
abstract: The acid sites associated with the external surface of zeolite particles are responsible for undesirable consecutive reactions, such as isomerization, alkylation, and oligomerization, resulting in a lower selectivity to a target product; therefore, the selective modification (deactivation) of the external surface of zeolite particles has been an important issue in zeolite science. Here, a new method for surface deactivation of zeolite catalyst was tested via a mechanochemical approach using powder composer. Postsynthetic mechanochemical treatment of ZSM-5 zeolite causes a selective deactivation of catalytically active sites existing only on the external surface, as a potentially useful catalyst for highly selective production of p-xylene.
authors: Division of Materials Science and Chemical Engineering, Yokohama National University , 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
authors: Satoshi
authors: S
authors: Inagaki
authors: Koki
authors: K
authors: Sato
authors: Shunsuke
authors: S
authors: Hayashi
authors: Junichi
authors: J
authors: Tatami
authors: Yoshihiro
authors: Y
authors: Kubota
authors: Toru
authors: T
authors: Wakihara
keywords: catalyst; deactivation; mechanochemical; powder composer; surface; zeolite