Consequently, molecular sieves, e.g., zeolites,
behave as solid solvents for molecules
adsorbed in their intracrystalline volume as illustrated
and demonstrated in this review by a
number of observations: the variation of adsorption
heats and NMR chemical shifts with zeolite
pore diameter and molecular size, the adsorption
of molecules in pores having a diameter
smaller than their free gaseous phase size, and
concentration effects affecting reaction rates of
both liquid and gas phase reactions.
Further understanding and quantification of
the behaviour of zeolites as solid solvents are
likely to impact dramatically on their use as
heterogeneous catalysts in organic and fine
chemicals synthesis. The latter will require a
transdisciplinary collaboration between organic
and zeolite chemists as well as chemical engineers
to tackle, quantify, and solve the various
problems inherent to this field of heterogeneous
catalysis.
Consequently, molecular sieves, e.g., zeolites,
behave as solid solvents for molecules
adsorbed in their intracrystalline volume as illustrated
and demonstrated in this review by a
number of observations: the variation of adsorption
heats and NMR chemical shifts with zeolite
pore diameter and molecular size, the adsorption
of molecules in pores having a diameter
smaller than their free gaseous phase size, and
concentration effects affecting reaction rates of
both liquid and gas phase reactions.
Further understanding and quantification of
the behaviour of zeolites as solid solvents are
likely to impact dramatically on their use as
heterogeneous catalysts in organic and fine
chemicals synthesis. The latter will require a
transdisciplinary collaboration between organic
and zeolite chemists as well as chemical engineers
to tackle, quantify, and solve the various
problems inherent to this field of heterogeneous
catalysis.
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