When temperatures cool down the pore on the surface to remove the air around it, go to. When carbon is around that results in a change of temperature, carbon sorbent pore into it stamped on the surface.
As the temperature cools, the pore surface area to pull out into the surrounding air when carbon is around. The change in temperature, it absorbs carbon pore stamped into the surface.
When the temperature cools pore in surface area to bring the air around inside. When carbon is around The change of temperature pore will absorb carbon into the stamp on the surface.