Mass Transport A Critical Element in Performance

With ion exchangers as with other heterogeneous catalysts, mass transport of reactants into the catalytic site and mass transport of products from the catalytic site can become totally rate controlling. A qualitative tabulation of these interacting relationships is provided in Table 2.

For estimating the suitability or design of a macro-porous polymer for effective mass transport, the equation given below, derived from the studies of Halasz and Martin, has been found very useful. The appropriate pore system for good mass transport can be selected by simply knowing the molecular weight of the expected product or the largest reactant molecule.

where: dp = pore diameter in A of the pore system at 50% of the total pore volume of the macroporous polymer; dM = random coil diameter in A of either the product molecule or the largest reactant molecule; MWM = molecular weight of product or largest reactant.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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