Static volumetric testing is typically performed at liquid nitrogen temperatures. Place an accurately weighed pretreated sorbent sample in the sample tube, first evacuate by vacuuming, and then bring the entire system to the desired vacuum. Then immerse the sample tube in a liquid nitrogen bath and fill it with known When the gas is adsorbed, the adsorbent adsorbs the gas, which causes the pressure to drop. After the adsorption equilibrium is reached, the equilibrium pressure of the gas is measured, and the adsorption amount can be calculated according to the pressure change of the system before and after the adsorption. The pressure of the adsorbed gas is changed to the system one by one, and the above operation is repeated, and the adsorption amount under different equilibrium pressures is measured and calculated.
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