We report a method to synthesize hollow ZSM-5 single crystals of a size below 100 nm that could function as nanoreactors with access through the zeolite micropores only. In the first step, ZSM-5 is synthesized with the respective crystal size. In the second, the zeolite is base leached and acid washed under mild conditions.

The shape selective catalysis based on ZSM-5 zeolite has found widespread application (1,2) in refining and petrochemical industry since long time. The product distribution associated with hydrocracking and hydroisomerization processes on ZSM-5 are predominantly controlled by the pore geometry and component diffusion. The various aspects of diffusion inside ZSM-5 pore structure have been widely...

The most studied catalysts for methane dehydroaromatization (MDA)?Mo/ZSM-5?are not commercialized yet due to the rapid deactivation and insufficient activity. Catalytic systems based on Fe Re are potential alternatives Mo-containing zeolites. Here, we compare catalytic performance of these as a function metal type its loading in ZSM-5 zeolite. results show that activity decreases order Re/ZSM-5...

Heavy crude oils are under constant investigation due to light oil exhaustion. So, its use is compulsory meet the world energy demand. present several drawbacks as high content of metals, heteroatoms, and asphaltenes, and, therefore, upgrading processes becoming essential. A deasphalting process, conventionally used for vacuum residue upgrading, can be an interesting pretreatment eliminate heav...

The catalytic activity of large zeolite H-ZSM-5 crystals in methanol (MTO) and ethanol-to-olefins (ETO) conversions was investigated and, using operando UV/Vis measurements, the catalytic activity and deactivation was correlated with the formation of coke. These findings were related to in situ single crystal UV/Vis and confocal fluorescence micro-spectroscopy, allowing the observation of the s...