In physical activation, the precursor is placed under a heat treatment at high temperatures, ranging of 700–1100 8C, in
presence of oxidizing agents, such as CO2, water steam, air, or a mixture of them .
In physical activation, the precursor is placed under a heat treatment at high temperatures, ranging of 700–1100 8C, inpresence of oxidizing agents, such as CO2, water steam, air, or a mixture of them .
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