1. Kumar, R., Huggahalli, M., Deng, S., Andrecovich, M.: Trace impurity removal from air. Adsorption 9, 243–250 (2003)
2. Fujita, A., Nakamura, M.: Method and apparatus for pre-purification for air cryogenic separation plant. U.S. Patent No. 5,689,974 (1997)
3. Ahn, H., Lee, C.H.: Adsorption dynamics of water in layered bed for air-drying TSA process. AIChE J. 49(6), 1601–1609 (2003)
4. Takeuchi, Y.: Wakariyasui Kyuutyaku no Sokutei to Kaiseki, pp. 50–57. Bunrigijyutsukai, Tokyo (2003)
5. Ergun, S.: Fluid flow through packed columns. Chem. Eng. Progr. 48(2), 89–94 (1952)