RESEARCH PROGRESS OF MOLECULAR SIEVE SKELETON ALUMINUM ATOM DISTRIBUTION
Molecular sieves have been widely used in acid-catalyzed reactions of petrochemical industry because of their variable acidic sites,good shape selectivity and hydrothermal stability.The distribution of acid sites is determined by the position of aluminum atom in the molecular sieve framework,therefore,the distribution of skeleton aluminum atoms(including the pore volume,chemical environment of skeleton aluminum location,the distance between two aluminum atoms)has a great influence on its acid catalytic performance(reaction pathway or reaction rate).Because the synthesis of molecular sieve involves a complex crystallization process,there are many factors affecting the distribution of skeleton aluminum atoms,such as the kind and concentration of starting materials,crystallization conditions,introduction of heteroatoms,and post-treatment methods,etc.Many researchers have done a lot of research on regulation of skeleton aluminum atoms.Based on this,the related research results were reviewed in order to promote the oriented synthesis of specific aluminum atom-distributed molecular sieves.
万方数据
维普
