An Experimental Study of H2 and Co2 Adsorption Behavior of C-Mof-5 and T-Mof-5: A Complementary Study

Abstract

-In this paper the cubic and tetragonal structure of MOF-5 were successfully synthesized and characterized by TGA and SEM analysis. Equilibrium adsorption isotherms of C-MOF-5 and T-MOF-5 for H 2 and CO 2 were measured up to 25 bar at 298 K using a volumetric method. The C-MOF-5 adsorbent synthesized in this study had a 0.107 and 79.9 wt% adsorption capacities at 298 K and 25 bar for H 2 and CO 2 , respectively. T-MOF-5 had a H 2 adsorption capacity of 0.122 wt% and CO 2 adsorption capacity of 67.6 wt% at 298 K and 25 bar. This behavior was attributed to more ZnO units in the T-MOF-5 structure. The difference between H 2 and CO 2 adsorption capacity for the cubic and tetragonal structure of MOF-5, suggests that C-MOF-5 and T-MOF-5 are potential adsorbents for the separation of CO 2 and H 2 from gas mixtures, respectively. Langmuir, Freundlich and Sips isotherm models were used to correlate the adsorption isotherms. The results showed that, at 298 K, the fit of the Sips isotherm to the experimental datawas better than Langmuir and Freundlich isotherms. According to TGA results, the thermal decomposition of C-MOF-5 requires a higher temperature than T-MOF-5.

A facile and efficient approach to increase the magnetic property of MOF-5

“…Metal-organic frameworks (MOFs) are crystalline materials in which an inorganic metal cluster is bonded to an organic ligand to form an infinitely extended network-like structure [1][2][3][4][5]. Because of its large surface area and tunable pores, MOF show great potential for adsorption process [6][7][8][9][10][11][12]. Moreover, magnetic MOF inherit the good performance of MOF such as the rapid separation and recovery of magnetic species [13][14][15].…”

“…As a matter of fact, the presence of any extra species in the MOF-5 pores, which are generated during the synthesis process, changes the MOF-5 structure from activated to nonactivated [5,11,[21][22][23][24]. One of the most important excess molecules, which are present in the non-activated MOF pores is the cluster-oxygen composition (i.e.…”

Interpreting the CO2 Adsorption on Functionalized Organic Group of IRMOF-1: A B3LYP Density Functional Theory based Study

“…Sources from which the removal of CO2 is desirable include natural gas power plants and other sources of H2 production [2], post-combustion flue gases [3] and transport vehicle emissions [4]. There are various CO2 capture technologies such as physical absorption [5], chemical absorption [6][7][8][9], adsorption [10][11][12][13][14][15] and membrane technology [16][17][18][19][20]. Due to the numerous endeavors in the study of CO2 capture in the past decade, nanoporous solids have been considered as the promising candidates for capable adsorption of gaseous carbon derivatives to limit the CO2 emission [21].…”