Physicochemical activation and palletisation of Azadirachta indica wood carbons for increased biomethane adsorbed energy storage

Adsorbed natural gas technology has offered various advantages over the normal compression and liquefaction based energy storage. Activated carbons are the materials that have micro-porous structures as required for methane adsorption. Herein, we highlight the preparation of activated carbons using KOH and steam in combined form. The combined activated carbons have a surface area of 963 m2/g as compared to chemically activated of 764 m2/g. For the analysis of biomethane adsorption, we also report the preparation of pellets using bentonite and Kaolin. The best results obtained were found with 20 % (weight basis) of Kaolin with gravimetric methane uptake of 0.28 g/g and volumetric methane uptake of 231 v/v with 177 v/v of deliverable capacity during the desorption from storage cylinder.

Automated summary

The article discusses the preparation of activated carbons using a combination of KOH and steam, as well as the preparation of pellets using bentonite and Kaolin. The research shows that combined activated carbons have a higher surface area, and adding 20% Kaolin can achieve the best methane adsorption results.