Mechanism of hindered movement of aromatics

Recently, researchers Hou Guangjin and Chen Kuizhi from the Solid State Nuclear Magnetic Resonance and Frontier Application Research Group (510 groups) of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, studied the molecular motion behavior of guest aromatics using solid state nuclear magnetic resonance (ssNMR) technology, and put forward a new understanding of the limiting effect of molecular sieve channels.

The unique microporous pore structure of molecular sieves endows them with a limiting effect, which plays an important role in adsorption separation and type-selective catalysis. Generally, the molecular sieve confinement effect becomes more and more significant with the size of the adsorbed molecular sieve and the size of the molecular sieve pore. However, considering the complex relationship between the molecular sieve skeleton structure, the distribution of acid sites and the adsorption molecular configuration, it is difficult to study the molecular sieve confinement effect at the molecular scale by means of experiments. MFI molecular sieves have unique through channels, zigzag channels and the environment where the channels cross and coexist, and have unique limiting effects on aromatic molecules represented by methyl-substituted benzene. The reaction and deactivation mechanisms related to aromatic hydrocarbons have received widespread attention.

Recently, researchers Hou Guangjin and Chen Kuizhi from the Solid State Nuclear Magnetic Resonance and Frontier Application Research Group (510 groups) of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, studied the molecular motion behavior of guest aromatics using solid state nuclear magnetic resonance (ssNMR) technology, and put forward a new understanding of the limiting effect of molecular sieve channels.

The unique microporous pore structure of molecular sieves endows them with a limiting effect, which plays an important role in adsorption separation and type-selective catalysis. Generally, the molecular sieve confinement effect becomes more and more significant with the size of the adsorbed molecular sieve and the size of the molecular sieve pore. However, considering the complex relationship between the molecular sieve skeleton structure, the distribution of acid sites and the adsorption molecular configuration, it is difficult to study the molecular sieve confinement effect at the molecular scale by means of experiments. MFI molecular sieves have unique through channels, zigzag channels and the environment where the channels cross and coexist, and have unique limiting effects on aromatic molecules represented by methyl-substituted benzene. The reaction and deactivation mechanisms related to aromatic hydrocarbons have received widespread attention.