Highly activated carbon from caustic digestion of rice hull ash and method

摘要

Disclosed are highly activated carbon particles derived from caustic digestion of rice hull ash obtained from thermal pyrolysis of rice hulls having an iodine number of at least 650 to 1000. The activated carbon pores are free of silicate residue from the caustic digestion. Also disclosed are methods of removing the silicate residue from the caustic silicate solution during digestion effective to substantially improve the activation of the carbon particles to commercial grade.