ABSTRACT APPARATUS AND PROCESS FOR LOW TEMPERATURE REGENERATION OF ADSORBENT MATERIAL An apparatus and process for low temperature regeneration that can be utilized in adsorption systems can include feeding low temperature regeneration gas to at least one off-line adsorber for regeneration of the adsorbent material within the vessel of the off-line adsorber(s). The regeneration time period can be set to facilitate regeneration of the adsorbent material without a need for a high temperature regeneration to occur. Some embodiments can be configured so a post-cooling operation while the regeneration gas is fed to the adsorber(s) can be avoided to permit embodiments to more effectively utilize heating time.