Pressure Swing and Thermal Swing Absorption Capacity Comparisons for Kr and Xe Using AgZ-PAN and HZ-PAN Sorbents.

摘要

Pressure Swing Adsorption (PSA) tests were performed utilizing both the HZ-PAN and AgZ-PAN sorbents. The results were then compared with the previous Thermal Swing Adsorption (TSA) results for both Kr and Xe. The two different engineered form sorbents were evaluated for Kr and Xe capacities at ambient temperature and 20 psig pressure in PSA operations. The AgZ-PAN showed an increase of more than three times capacity for Xe when compared to TSA operations without pressure and a small Kr capacity increase was observed. The HZ-PAN sorbent had no capacity for either Kr or Xe at ambient temperature with TSA operations however; under 20 psig PSA operations, it obtained capacities of 27 mmol/kg and 2.9 mmol/kg for Xe and Kr respectively. The selectivities of Xe relative to Kr were also calculated for the sorbents. The results of these tests indicate that PSA operations can be utilized to increase the capacities of both Kr and Xe under ambient conditions with the sorbents tested.