Application fields and development prospects of microporous molecular sieves(1)
For half a century, molecular sieves have played an increasingly important role in petroleum processing, petrochemical and fine chemicals, and environmental chemicals as the main catalytic materials, adsorption separation materials and ion exchange materials. Nevertheless, the role of molecular sieves in the above three traditional fields still has great prospects for development. First, so far (2013), there are 213 kinds of molecular decorations with known structures, and the diversity of component elements and skeleton structures See, there is still a lot of room for development. However, only A, X and Y faujasite, mordenite, ZSM-5, ZSM-11, MCM-22, L, B, erionite, RHO, CHA have been used on an industrial scale so far. , AEL type and TS, and SAPO-34.SAPO-11, SAPO-31 and so on less than twenty kinds.
It is speculated that in the next 20 years, due to the large-scale
development of fine chemicals and intermediate chemicals, as well as the
renewal and development of traditional applications in petroleum processing,
petrochemical and coal chemical industries, the application of molecular sieves
in catalysis and adsorption separation will be further promoted. great
development in the field.
Secondly, in the past 20 years, due to the development of new
catalysis fields of molecular sieves, such as base catalysis of molecular
sieves, extra-largerpore molecular sieve catalysis, redox catalysis and chiral
catalysis of molecular sieves (asymmetric catalysis with zeolites), etc. , and
the rise of micropore-containing hierarchical porous composites, further
promote the progress of bifunctional and even multifunctional molecular sieve
catalysts. This will provide a strong foundation for the further development of
molecular sieves in the field of catalysis and adsorption separation.
