Question 31 on Professional Knowledge in 2014
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31 Which of the following options can directly affect the equilibrium adsorption amount of the adsorbate by the adsorbent? A. Physical structure of the adsorbate B. Chemical composition of the adsorbent C. Viscosity of the adsorbate D. Viscosity of the adsorbent The correct answer is B. I don’t understand. A. The physical structure definitely has an impact, as different specific surface areas result in different amounts of adsorption. B. The chemical composition of the adsorbent, that is, the components including the types and concentrations of substances, which are also the properties of those substances. This should affect the amount of adsorption, especially for chemical adsorption. C, D? These two doubts.
Option A refers to the adsorbate; changing it to the physical structure of the adsorbent will be correct. There is a passage in a tutorial version from Tianjin University on adsorption that states: the equilibrium adsorption amount of the adsorbate depends first and foremost on the chemical composition and physical structure of the adsorbent, as well as on the pressure and temperature of the system and the composition of the mixture. Therefore, the correct answer is B.