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← ScienceWhich outcome results when a molecular sieve is heated above its regeneration temperature in a solvent recovery system?
A)Increased solvent adsorption capacity
B)Exothermic runaway thermal decomposition✓
C)Reduced material pore size
D)Selective removal of larger molecules
💡 Explanation
When the molecular sieve surpasses regeneration temperature, exothermic runaway thermal decomposition can occur because the adsorbed solvent decomposes rapidly releasing heat generating further temperature increases. Therefore runaway thermal decomposition results, rather than increased capacity, reduced pore size, or selective adsorption which require intact sieve structure.
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