Experimental and simulation study of the effect of surface functional groups decoration on CH4 and H2 storage capacity of microporous carbons

An Upper Bound Visualization of Design Trade‐Offs in Adsorbent Materials for Gas Separations: CO2, N2, CH4, H2, O2, Xe, Kr, and Ar Adsorbents

“…The un-modified activated carbon sits just inside the bound (1.4,42,-23), while after modification with a urea/ethanol mixture, the material exceeded the bound (1.4,82,-24). [100] This paper also investigated oxidizing both of these samples with nitric acid to increase the concentration of oxygen functional groups; however, the oxidizing step reduced the capacity, placing the oxidized materials well within the bound (oxidized activated carbon (0.6,30,-15) and oxidized urea-modified activated carbon (0.7,71,-26)). [100] No metal-organic frameworks overcame the uptakeselectivity bound for CH 4 /H 2 separation.…”

Response of Molecular Structures and Methane Adsorption Behaviors in Coals Subjected to Cyclical Microwave Exposure

“…9 Mirzaei et al studied the adsorption of methane in active carbons with/without surface functional groups by doping heteroatoms into the carbon framework, finding that the strong electronegative O atom in the functional groups repels the electronegative C atom in the CH 4 molecule. 10 Yu et al, 11 Han et al, 12 and Kang et al 13 also found that the types and proportions of surface groups are closely related to the methane adsorption capabilities in coals. Many stimulation approaches have been used by previous researchers to modify the molecular structures and methane adsorption performances of coals.…”

“…Wang et al studied the effect of the chemical composition of coal on methane adsorption and found that nonpolar functional groups could promote CH 4 adsorption on the surface of coals; in contrast, polar oxygen-containing functional groups could weaken the CH 4 adsorption capacity . Mirzaei et al studied the adsorption of methane in active carbons with/without surface functional groups by doping heteroatoms into the carbon framework, finding that the strong electronegative O atom in the functional groups repels the electronegative C atom in the CH 4 molecule . Yu et al, Han et al, and Kang et al also found that the types and proportions of surface groups are closely related to the methane adsorption capabilities in coals.…”

Highly Efficient Iodine Capture and CO2 Adsorption using a Triazine‐Based Conjugated Microporous Polymers

“…They have long half‐life, high volatility and strong diffusion ability in water, which is extremely harmful to human health [2] . At present, solid adsorbents such as activated carbon, metal‐organic frameworks, silver‐based zeolites and so on, have been widely used as effective adsorbents in the fields of CO 2 , CH 4 , H 2 and I 2 capture due to the high porosity and light element frameworks [3–5] . However, poor water stability of most solid adsorbents and high cost impairs their CO 2 separation and iodine capture capability in practical applications and limits their wide application.…”

“…[2] At present, solid adsorbents such as activated carbon, metalorganic frameworks, silver-based zeolites and so on, have been widely used as effective adsorbents in the fields of CO 2 , CH 4 , H 2 and I 2 capture due to the high porosity and light element frameworks. [3][4][5] However, poor water stability of most solid adsorbents and high cost impairs their CO 2 separation and iodine capture capability in practical applications and limits their wide application. Therefore, it is necessary to develop suitable adsorbents to tackle this issue of global importance in high demand.…”