Highly reversible sorption of H₂S and CO₂ by an environmentally friendly Mg-based MOF

Abstract

Mg-CUK-1 exhibited high chemical stability towards H2S and H2O. Monte Carlo Simulations correlated with H2S uptake.

Bottleneck Effect Explained by Le Bail Refinements: Structure Transformation of Mg-CUK-1 by Confining H2O Molecules

“…The water-loading dependence of the porosity of Mg-CUK-1 was analyzed based on the reported [12,13] water adsorption isotherm data. For that purpose, the experimental PXRD patterns were collected at different H 2 O loadings (see SM, water-loading within Mg-CUK-1, Figure S4) and the cell parameters of the H 2 O-loaded material (Mg-CUK-1) were determined by the Le Bail methodology (FullProf program; see SM, PXRD profile refinement of Mg-CUK-1, Figures S5-S8) [14,15].…”

“…This effect is expected to accommodate the CO 2 molecules more efficiently, by partially obstructing the pore-windows of Mg-CUK-1. Indeed, this particular configuration (one hydrogen-bonded H 2 O molecule per unit cell) corresponds to 18% of relative humidity (RH), according to the water adsorption isotherm [12,13]. Remarkably, Mg-CUK-1 revealed a 1.8-fold increase in CO 2 capture from 4.6 wt% to 8.5 wt% in the presence of 18% RH [12] (See Figure S11).…”

“…The confined H 2 O molecules are well-ordered in the pore-structure of these µ 2 -OH functionalized MOFs, working as preferential adsorption sites for the subsequent CO 2 molecules [10]. In this communication, we describe the structure transformation of Mg-CUK-1 (CUK for Cambridge University-KRICT, see SM, Figure S1) [11] due to the confined H 2 O molecules within its pores, which previously demonstrated enhanced CO 2 capture properties [12,13].…”

The Chemistry of Reticular Framework Nanoparticles: MOF, ZIF, and COF Materials

“…Besides NO, further biologically active gases are hydrogen sulfide and carbon monoxide that strongly affect (patho-) physiological functions within the body, including the regulation of vasodilation, neurotransmission and inflammation. [346] The adsorption of H 2 S and CO to reticular framework nanoparticles are addressed [347] including MIL-53, [348] MIL101, [349] and CPO-27. [350] Biomedical applications, [333,336,351] however, are only shown for H 2 S nanoparticles.…”

Adsorbents for Noxious Gas Sequestration: State of the Art

“…; Article no.JSRR.51792 activated carbon; [11][12][13][14][15][16][17][18] have and capture of process systems or these compounds, organic frameworks carbon (AC) and considered as promising and storage, due pore volume, stability, ease of low regeneration adsorbents can specific applications functionalization of the utilization becomes adsorption capacity review of the polymers, AC and considered. The therefore, was to adsorbents for and then proffer…”