The study by indicated that activated carbons with high surface areas in the order of 1800 m2/g as well as with well-developed mesoporosity could be produced from wood using H3PO4 as an activating agent. Meanwhile, the authors also
performed activation with (NH4)2HPO4, which had comparable
properties of H3PO4, and found the surface area of the obtained
activated carbon was 1350 m2
/g