A thermodynamic study of carbon dioxide adsorption on a zeolite-templated carbon (ZTC), a superactivated carbon (MSC-30), and an activated carbon (CNS-201) was carried out at temperatures from 241 to 478 K and pressures up to 5.5•10⁶ Pa. Excess adsorption isotherms were fitted with generalized Langmuir-type equations, allowing the isosteric heats of adsorption and adsorbed-phase heat capacities to be obtained as a function of absolute adsorption. On MSC-30, a superactivated carbon, the isosteric heat of carbon dioxide adsorption increases with occupancy from 19 to 21 kJ•mol⁻¹, before decreasing at high loading. This increase is attributed to attractive adsorbate–adsorbate intermolecular interactions as evidenced by the slope and magnitude of the increase in isosteric heat and the adsorbed-phase heat capacities. An analysis of carbon dioxide adsorption on ZTC indicates a high degree of binding-site homogeneity. A generalized Law of Corresponding States analysis indicates lower carbon dioxide adsorption than expected. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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二氧化碳对纳米结构碳的吸附物-吸附物相互作用的热力学研究

在241至478 K的温度和高达5.5的压力下进行了二氧化碳在沸石模板碳（ZTC），超活性碳（MSC-30）和活性碳（CNS-201）上吸附的热力学研究。 •10 ⁶ Pa。过量的吸附等温线与广义的Langmuir型方程式拟合，从而可以根据绝对吸附的函数获得吸附的等排热和吸附相的热容量。在MSC-30（一种超活性碳）上，二氧化碳吸附的等排热从19到21 kJ•mol ^-1逐渐增加，然后在高负载下降低。这种增加归因于等吸附热和被吸附相热容量增加的斜率和大小所证明的有吸引力的被吸附物-被吸附物分子间相互作用。对ZTC上二氧化碳吸附的分析表明，结合位点具有高度的均一性。对应国家的一般定律分析表明，二氧化碳的吸附量低于预期。©2017美国化学工程师学会AIChE J，2017