368
propagation of intermediates are controlled by the confinement effect of pore and
cage structure. These features result in product speciation. For instance, larger side
chains on the benzene in a larger cage will allow more of propylene compared to
ethene. Similarly, the larger diffusing diameter will allow more aromatics to exit
along with higher alkenes and alkanes. Apart from the physical structural effect,
acid density and strength play a significant role.
4 Conclusion
The chapter was aimed at developing the general perspective toward design-impacteffect analysis for the methanol-to-olefins reaction system. The rationality of this
study emerges from the growing role of petrochemical industries for improving the
daily life experience. Keeping the final product speciation in mind, we discussed
various facets of control parameters relevant to catalyst design to increase their
Table 3 Chemical species during the life cycle of MTO reaction
It illustrates the complexity of reaction pathways and need for understanding the mechanism for
better catalyst design. Species adapted from references [6, 130, 136, 137]
M. Kumar