Activated carbon derived from waste coffee grounds for stable methane storage

Nanotechnology
K Christian KempKwang S Kim

Abstract

An activated carbon material derived from waste coffee grounds is shown to be an effective and stable medium for methane storage. The sample activated at 900 °C displays a surface area of 1040.3 m(2) g(-1) and a micropore volume of 0.574 cm(3) g(-1) and exhibits a stable CH4 adsorption capacity of ∼4.2 mmol g(-1) at 3.0 MPa and a temperature range of 298 ± 10 K. The same material exhibits an impressive hydrogen storage capacity of 1.75 wt% as well at 77 K and 100 kPa. Here, we also propose a mechanism for the formation of activated carbon from spent coffee grounds. At low temperatures, the material has two distinct types with low and high surface areas; however, activation at elevated temperatures drives off the low surface area carbon, leaving behind the porous high surface area activated carbon.

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Citations

May 23, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Vivek KumarClaudia Felser
Feb 20, 2019·Sensors·Pravin JagdaleAnd Alberto Tagliaferro
Jun 4, 2018·Environmental Science and Pollution Research International·Marinos StylianouDionysia Fasoula

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