Adsorption aided low pressure natural gas storage

Does anyone have any experience with adsorption aided natural gas storage? Low pressure in this sense is referring to applications less than 500 psig. I have read some scholarly papers on using activated carbon for this purpose but haven't seen it applied in the commercial settings. Is this a commercially available technology? or is it available with alternate adsorbents? I am already aware of issues concerning heat of adsorption as well as the limits of mass flux due to de-adsorption rates. Are there additional reasons it's not commonly used (it may be common and if it is, stick my nose in it)?
Please understand, I am just looking at this in terms of storage, not for gas scrubbing or polishing.
Thank you