A series of metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) possessing
various functionalities, pore structures, and surface areas were evaluated for sorption and storage
properties of environmentally significant gases (H_2, CO_2, and CH_4). It was concluded that the gas
sorption behavior follows a general trend that materials with high surface area show enhanced gas
uptake performance. For example, MOF-177 (SA = 5200 m^2/g) captures 7.2 wt% of H_2 at 77 K and 19
wt% of CH_4 at 298 K. In addition, MOF-177 exhibits exceptionally high gravimetric CO_2 uptake up to
120 wt% at 298 K. Similarly, the gas storage capacity for COFs seems to follow the same trend and it is
determined by the apparent surface area. The architectural stability of both COFs and MOFs upon high
pressure H_2 and CH_4 gas sorption measurements were manifested by isotherms which reach saturation
without significant hysteresis