Cuhadar has concluded that hazelnut shells and hazelnut husks
can be used as raw materials for the production of activated carbon
by using H3PO4 as the activating agent. N2 and CO2 adsorption/
desorption isotherms show that activated carbons obtained from
hazelnut shell have a certain degree of porosity, located mainly
in micro size of pores while hazelnut husk based activated carbons
are mainly mesoporous. Novelties of this work are the use of phosphoric
acid (H3PO4) as the activating agent for hazelnut shell during
carbonization and using hazelnut husk for activated carbon
production as the starting material [53].