Synthesis of active carbon from nutshell Macadamia and its adsorption affinity toward methane

The microporous carbon adsorbent with the specific micropore volume W 0 = 0.80 cm 3 g −1 , micropore width X 0 = 1.32 nm, and specific surface area S BET = 2115 m 2 g −1 was synthesized by the thermochemical activation method from the carbonizate of nutshell Macadamia in the presence of orthophosphoric acid at 1173 K. At 303 K and 20 MPa, the adsorption capacity of the adsorbent to methane reaches ∼22 wt.%. The volume density of adsorbed methane on the compacted carbon adsorbent with the binder at a pressure of 10 MPa was found to be ~200 nm 3 m −3 .*