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Multifunctional Mesoporous Inorganic Solids (Hardcover, 1993 ed.)
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Multifunctional Mesoporous Inorganic Solids (Hardcover, 1993 ed.)
Series: NATO Science Series C, 400
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1. Introduction. There is much interest in the general subject of
porous inorganic materials with respect to their use as sorbents or
catalysts. Such inorganic solids may be microporous, mesoporous or
macroporous according to the sizes of the pores within the solid.
Often there is a range of pore sizes within any given solid and so
there is special interest in the synthesis, characterisation and
application of porous inorganic solids with well defined pores.
Pores of diameter larger than 50 nm are generally termed
macropores. Those with diameters of less than 2 nm are micropores
and pores of intermediate size are called mesopores. Solids, which
contain only mesopores, are correctly called mesoporous but very
often there is a combination of different types of porosities
within one given solid. The synthesis, characterisation and
application of microporous solids is much more advanced than is the
case with mesoporous substances. Moreover, the synthesis of
crystalline mesoporous materials is one clear goal for the future
but which has not been attained so far. Consequently, it is of
interest to examine the current state of our knowledge of
microporous materials and to examine how this may apply to
mesoporous materials. Both catalytic and sorption processes could
benefit from studies of mesoporous solids because the mesopores
could permit diffusion of larger reactants or products than is the
case in microporous materials. 2.
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