Alaabada ceyriinka ah ee kaarboonka karbon-ka-godka ee loo yaqaan 'phenolic resin', ayaa marka hore lagu dari kara oo lagu dari karaa sheyga saldhigga ah, ka dibna pores. PSA technology separates nitrogen and oxygen by the van der Waals force of carbon molecular sieve, therefore, the larger the surface area, the more uniform the pore distribution, and the more the number of pores or subpores, the adsorption capacity is bigger.