h i g h l i g h t s • To point out the theoretical advantages of GMM in relation to other (often used) panel data estimators. • To demonstrate its advantages in the case of the emerging markets in the countries of Latin America. • To identify a relevant econometric model. • To demonstrate the impact of crucial macro and microeconomic variables on the NPLs.
The
drying of dichloromethane with a molecular sieve 3A packed
bed process is modeled and experimentally verified. In the process,
the dichloromethane is dried in the liquid phase and the adsorbent
is regenerated by water desorption with dried dichloromethane product
in the vapor phase. Adsorption equilibrium experiments show that dichloromethane
does not compete with water adsorption, because of size exclusion;
the pure water vapor isotherm from literature provides an accurate
representation of the experiments. The breakthrough curves are adequately
described by a mathematical model that includes external mass transfer,
pore diffusion, and surface diffusion. During the desorption step,
the main heat transfer mechanism is the condensation of the superheated
dichloromethane vapor. The regeneration time is shortened significantly
by external bed heating. Cyclic steady-state experiments demonstrate
the feasibility of this novel, zero-emission drying process.
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