Abstract

The equilibrium distribution of adsorbate molecules between the surface of an adsorbent and the gas phase is a function of namely five parameters: (1) pressure, (2) temperature, (3) surface area of the adsorbent, (4) nature of the adsorbent, and (5) nature of the adsorbate. An adsorption isotherm describes the amount of gas adsorbed on the surface of an adsorbent at a constant temperature as a function of its relative pressure. An adsorption isobar is a plot that describes the amount of gas adsorbed on the surface of an adsorbent at a constant pressure as a function of temperature. An adsorption isostere is a plot that describes the relationship between pressure and temperature for a constant amount of adsorbed gas. Following adsorption, surface reaction takes place through different mechanisms, which will be discussed and both the adsorption and reactions steps are strongly dependent on the architecture of catalysts, which can be aided by cocatalysts and supports.

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