Finding and Evaluating of Adequate Adsorbents for the Adsorption of CO₂from Humid Gas Streams

Abstract

By studying the literature adsorbent materials were identified that are suitable for the physical and/or chemical adsorption of anthropogenic CO2 from gas streams that are nearly saturated with water vapor. Promising adsorbents (silica Tri‐PE‐MCM‐41, Zeolite 5 A BF, MOF Mg(DOBDC), MOF Basolite C300, and 3‐Aminopropyl‐functionalized silica) were investigated regarding their behavior in breakthrough experiments with CO2 and water vapor. Only the amine‐functionalized silica Tri‐PE‐MCM‐41, if preloaded with water, has suitable properties for this application. This is also the case for pelletized Tri‐PE‐MCM‐41, considering an industrial application. The thermodynamic analysis of pure CO2 adsorption using the ALIc model shows that the strongest binding forces between the CO2 molecule and the adsorbent wall are present during the adsorption of CO2 onto Tri‐PE‐MCM‐41. Differential and integral enthalpies of the system CO2/Zeolite 5ABF also show the strong affinity of this adsorbent/adsorptive system.

Functional Metal Organic Framework/SiO2 Nanocomposites: From Versatile Synthesis to Advanced Applications

“…MOF materials have been widely used in the field of gas adsorption due to their high specific surface area, adjustable pore size, and pore surface, especially in the adsorption of carbon, sulfur, and nitrogen-containing gases [105,106,107]. The silica in the MOF/silica composites acts as a structure-directing agent to guide the growth of MOFs into a regular morphology and provides protection for MOFs to improve their stability [65].…”

Understanding the Effects of Binders in Gas Sorption and Acidity of Aluminium Fumarate Extrudates

“…This requires further understanding of their shaping process, as this can have an impact on their properties and thus on their performances [3] . Very often, MOFs suffer from a strong decrease in available surface area, pore volume or crystallinity upon compaction into tablets or pellets [4,5] . Recent studies concerning sol‐gel synthesis methods have offered an alternative to traditional shaping technologies, [6,7] but applicability of this strategy to a wide range of MOFs has not yet been proven.…”

“…[3] Very often, MOFs suffer from a strong decrease in available surface area, pore volume or crystallinity upon compaction into tablets or pellets. [4,5] Recent studies concerning sol-gel synthesis methods have offered an alternative to traditional shaping technologies, [6,7] but applicability of this strategy to a wide range of MOFs has not yet been proven. Different classical techniques have been reported for the shaping of MOFs, such as granulation, [8,9] pelletization, [5,[10][11][12][13] coating (e. g. spray-drying, washcoat or spin-coating) [14] or even foaming production.…”

CO2 Sequestration by Triazolylidene-Derived N-Heterocyclic Olefins: A Computational Study

“…The increasing of carbon dioxide (CO 2 ) concentration in the atmosphere has prompted the development of different strategies toward its chemical transformation . The successful CO 2 conversion, on the other hand, frequently requires extreme reaction conditions due its chemical inertness …”