swing adsorption processes for CO2 capture in selected MOFs and zeolites

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swing adsorption processes for CO2 capture in selected MOFs and zeolites ( swing-adsorption-processes-co2-capture-selected-mofs-and-zeo )

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(6) where and are the heat capacity of the adsorbent and the isosteric heat of adsorption, respectively. Note that is often expressed as an average value for the entire surface coverage; we have used different values in this work depending on the amount adsorbed in each adsorption and desorption condition. Therefore becomes . In addition, densities and heat capacities were held constant and taken from the work by Huck et al.85 Moreover, thermal energy and electrical energy have been compared based on exergetic -energy quality- analysis. In this case, since thermal energy can be supplied in a power plant by diverting steam from the power cycle (thus reducing the power generation of the plant), must be multiplied by the Carnot efficiency and the efficiency of the gas turbine.87,88 Two additional equilibrium process parameters used in this work are recovery and purity: the first one is defined as the relationship between working capacity and the uptake, while purity is related to the working capacities of all components. Furthermore, it is known that for transportation through a pipeline network, CO2 product stream must be compressed above 150 bar,89 which is generally accomplished through a multi-stage compressor train with intercooling to compress the stream. Transportation and injection costs have not been included as they are out the scope of the current study. 17

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