Dynamic adsorption of Xe on a fixed-bed adsorber at 77 K

In designing a fixed-bed adsorber, it is vital to understand dynamic adsorption properties of the unit. Temperature is an important effect on adsorbent performance, as the dynamic adsorption coefficients tend to increase with decreasing temperature. To minimize the volume of the fixed-bed adsorber, the dynamic adsorption characteristics of Xe were studied at 77 K by employing a variety of adsorbents under different operational conditions. The carbon molecular sieve performed better than that of activated carbon. Both operational conditions and the presence of gaseous impurities were found to affect the adsorption properties.

Stress-dependent undrained shear behavior of remolded deep clay in East China

象和局部剪切带逐渐明显(图2和5)，峰值应力以及相应轴向应变则不断减小(图8和9)；3.在大于2 MPa 的高压固结不排水试验中，其孔隙水压/轴向应变曲线明显不同于常压(图3)；4.上述与压力相关的力学性质均与黏土微观结构相关(图6和12)；5.高压下黏土难以达到所谓的临界状态。