# US 10,765,990 B2 · Systems and methods for efficient heating of sorbents in an indoor air scrubber > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,765,990 B2 - Document ID: US10765990B2 - Status: Granted - Kind: B2 - Application number: 15/892,044 - Filed: 2018-02-08 - Published: 2018-09-20 - Granted: 2020-09-08 - Earliest claimed: 2013-09-17 - Assignees: Enverid Systems, Inc. - Applicants: EnVerid Systems, Inc. - Inventors: Udi Meirav; Israel Biran - Web page: https://patentgrep.com/patent/US10765990B2 ## CPC - B01D 53/0462: {Temperature swing adsorption} - B01D 2257/11: Noble gases - B01D 2257/302: Sulfur oxides - B01D 2257/402: Dinitrogen oxide - B01D 2257/404: Nitrogen oxides other than dinitrogen oxide - B01D 2257/502: Carbon monoxide - B01D 2257/504: Carbon dioxide - B01D 2257/708: Volatile organic compounds V.O.C.'s - B01D 2259/4508: for cleaning air in buildings - B01D 2259/65: Employing advanced heat integration, e.g. Pinch technology - Y02C 20/10: of nitrous oxide (N2O) - Y02C 20/40: of CO2 - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG] ## Abstract Embodiments of the present disclosure are directed to systems and methods for regenerating a sorbent material of a scrubber, configured for scrubbing a contaminant from indoor air from an enclosed space. Some embodiments include a sorbent material portion (SMP) including a sorbent material, which may be configured to be cycled between an adsorption phase for adsorbing a contaminant from indoor air, and a regeneration phase configured for releasing at least a portion of the contaminant adsorbed by the sorbent material during the adsorption phase thereof, via temperature swing adsorption, into a purging airflow. ## Claims ### Claim 1 A system for regenerating a sorbent material of a scrubber configured for scrubbing a contaminant from indoor air from an enclosed space comprising: a sorbent material portion (SMP) including a sorbent material, the SMP configured to be cycled between at least two operational phases including: an adsorption phase for adsorbing a contaminant from indoor air, and a regeneration phase configured for releasing at least a portion of the contaminant adsorbed by the sorbent material during the adsorption phase thereof via temperature swing adsorption into a purging airflow, wherein the system is configured to operate in one operational phase at a time; and a shunt conduit configurable in a closed loop arrangement with the SMP, such that during at least a first phase of the regeneration phase, the purging airflow exiting from the SMP is directed back to an inlet of the SMP to be flowed over and/or through the sorbent material again. ### Claim 2 (depends on 1) The system of claim 1, wherein the conduit is configured in the closed loop arrangement at least until the temperature of the sorbent material reaches the regeneration temperature. ### Claim 3 (depends on 1) The system of claim 1, wherein during a second phase of the regeneration phase the shunt conduit is closed off by one or more dampers and the purging air flow is exhausted to the outdoor environment. ### Claim 4 (depends on 1) The system of claim 1, further comprising a heater configured to heat at least one of the sorbent material and the purging airflow to a regeneration temperature. ### Claim 5 (depends on 1) The system of claim 1, wherein the shunt conduit is configurable in a closed loop arrangement with the SMP during the regeneration phase only. ### Claim 6 A system for regenerating a sorbent material of a scrubber configured for scrubbing a contaminant from indoor air from an enclosed space comprising: a sorbent material portion (SMP) including a sorbent material, the SMP configured to be cycled between at least two operational phases including: an adsorption phase for adsorbing a contaminant from indoor air, and a regeneration phase configured for releasing at least a portion of the contaminant adsorbed by the sorbent material during the adsorption phase thereof via temperature swing adsorption into a purging airflow, the purging airflow configured to flow over and/or through the sorbent material during the regeneration cycle; a heater configured to heat at least one of the sorbent material and the purging airflow to a regeneration temperature; a heat exchanger configured to transfer heat from the purging airflow exiting the SMP after flowing over and/or through the sorbent material to an incoming fresh purging airflow; an air inlet configured to receive the purging airflow at a first temperature, and a conduit configurable during the regeneration phase only to establish a closed loop or shunt arrangement with the SMP, wherein: the system is configured to operate in one operational phase at a time; the received purging airflow is heated directly and/or indirectly by the heater from the first temperature to at least the regeneration temperature, and the conduit is configurable to establish the closed loop or shunt arrangement with the SMP such that during at least an initial phase of the regeneration phase, the purging airflow exiting from the SMP is directed back to an inlet of the SMP to be flowed over and/or through the sorbent material again. ### Claim 7 (depends on 6) The system of claim 6, wherein the heater is selected from the group consisting of: an electrical coil, a hot fluid coil, a furnace, and a solar heating device. ### Claim 8 (depends on 6) The system of claim 6, wherein configuration of the heat exchanger is selected from the group consisting of: a shell and tube configuration, an air coil configuration, a plate configuration, a counter-flow configuration, and a fin configuration. ### Claim 9 (depends on 6) The system of claim 6, further comprising an incoming purging airflow conduit and an exhausted purging airflow conduit, wherein the heat exchanger is configured to transfer heat from the exhausted purging airflow to the incoming purging airflow via thermal communication between the exhausted purging airflow conduit and the incoming purging airflow conduit. ### Claim 10 A system for regenerating a sorbent material of a scrubber configured for scrubbing a contaminant from indoor air from an enclosed space comprising: a sorbent material portion (SMP) including a sorbent material, the SMP configured to be cycled between at least two operational phases including: an adsorption phase for adsorbing a contaminant from indoor air, and a regeneration phase configured for releasing at least a portion of the contaminant adsorbed by the sorbent material during the adsorption phase thereof via temperature swing adsorption into a purging airflow; and a shunt conduit configurable in a closed loop arrangement with the SMP, such that during at least a first phase of the regeneration phase, the purging airflow exiting from the SMP is directed back to an inlet of the SMP to be flowed over and/or through the sorbent material again, wherein during a second phase of the regeneration phase, the shunt conduit is closed off by one or more dampers and the purging air flow is exhausted to the outdoor environment.