METHANE STORAGE ON OLIVE STONES BASED ACTIVATED CARBON DURING LONG CYCLIC OPERATION (CHARGE- DIS....

The behaviour of an activated carbon based on olive stones (CAGOCom) as an adsorbent for pure methane was studied during cyclic operation of 36 adsorption-desorption cycles at ambient temperature (298 K) at low pressure of roughly 10 bars. The repeatability of the charge-discharge process, which is critical for automotive applications, has been assessed by determining the desorption yield, adsorption efficiency, and residual cumulated quantities. To explain the massive increase in residual cumulated methane amount during the cyclic operation, an average adsorbed amount of about 50 mg/g was conserved with a high adsorption efficiency of about 80 percent and a moderate desorption amount of about 40 mg/g for all cycles. All of these findings supported the use of grain-based activated carbons as a viable choice for gas storage in automotive applications.

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