US 2026/0145117 A1Published application

Adsorption process

AssigneeKorea Institute of Energy Research

InventorsJong Ho PARK, Hyung Jin YOON, Jong Kee PARK, Hee Tae BEUM, Sang Sup HAN, Ko Yeon CHOO

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Abstract

An adsorptive separation method is disclosed. The adsorptive separation method of the present invention is a method for adsorptively separating a first gas from a mixed gas using a plurality of adsorption beds provided with an adsorbent selectively adsorbing the first gas, characterized by comprising an adsorption step, a depressurization step, a first rinse step, a second rinse step, a depressurization desorption step, a purge step, a pressurization step, a pressure increasing equalization and step, a repressurization step. According to the present invention, in the second rinse step, a high-purity first gas is introduced into the adsorption bed at a first pressure, and in the depressurization desorption step, the first gas is compressed to the first pressure by a compressor in a process of being transferred to a high-pressure product vessel, thereby making it possible to provide an adsorptive separation method configured to reduce power consumption by pressurizing a product gas of atmospheric pressure or higher discharged in a blowdown step to a pressure at which a rinse is performed, and to reduce power consumption used to create a recirculation stream used for the rinse.

Claims10

Dependent claims

An adsorptive separation method for adsorptively separating a first gas from a mixed gas using a plurality of adsorption beds provided with an adsorbent selectively adsorbing the first gas, the method comprising:

an adsorption step of supplying the mixed gas to the adsorption bed so that the adsorption bed adsorbs the first gas, and discharges a second gas separated from the first gas;
a depressurization step of depressurizing the adsorption bed, for which the adsorption step is completed, discharging the second gas existing in a void space of the adsorption bed and concentrating the first gas;
a first rinse step of transferring an off-gas having a higher concentration of the first gas than the mixed gas to the adsorption bed, for which the depressurization step is completed, to remove gas components other than the first gas;
a second rinse step of transferring a high-purity first gas of a high-pressure product vessel to the adsorption bed, for which the first rinse step is completed, to remove gas components other than the first gas;
a depressurization desorption step of depressurizing and desorbing the first gas adsorbed on the adsorption bed, for which the second rinse step is completed, and transferring the first gas to the high-pressure product vessel;
a low-pressure cleaning step (purge step) of transferring a gas from an intermediate storage tank storing a portion of the gas discharged in the depressurization step to the adsorption bed, for which the depressurization desorption step is completed, to additionally desorb the first gas adsorbed on the adsorption bed for which the depressurization desorption is completed;
a first partial pressurization step of pressurizing the adsorption bed, for which the low-pressure cleaning step is completed, by transferring a portion of the gas of the intermediate storage tank storing the gas discharged in the depressurization step, and the off-gas discharged in the first rinse and the second rinse step to the adsorption bed;
a pressure increasing equalization step of pressure equalizing and pressurizing the adsorption bed, for which the first partial pressurization is completed, by transferring a portion of the off-gas obtained in the depressurization step to the adsorption bed;
and a repressurization step of pressurizing the adsorption bed, for which the pressure equalization pressurization is completed, by transferring a high-concentration first gas of the intermediate storage tank to the adsorption bed,
wherein, in the second rinse step, the high-purity first gas is introduced into the adsorption bed at a first pressure,
and in the depressurization desorption step, the first gas is introduced into a compressor while maintaining a pressure during depressurization, compressed to the first pressure or higher, and transferred to the high-pressure product vessel.

8 more elements

an adsorption step of supplying the mixed gas to the adsorption bed so that the adsorption bed adsorbs the first gas, and discharges a second gas separated from the first gas;
a depressurization step of discharging the first gas adsorbed on the adsorption bed to depressurize the adsorption bed;
a first rinse step of transferring an off-gas having a higher concentration of the first gas than the mixed gas to the adsorption bed to remove gas components other than the first gas;
a second rinse step of transferring a high-purity first gas of a high-pressure product vessel to the adsorption bed to remove gas components other than the first gas;
a second depressurization step of connecting the adsorption bed, for which the second rinse step is completed, with the adsorption bed, for which a first partial pressurization is completed after low-pressure cleaning, to depressurize a pressure of the adsorption bed, for which the second rinse step is completed, in a same direction as a direction of a raw material while partially removing a high-concentration second component existing at an outlet part of the adsorption bed within the adsorption bed;
a depressurization desorption step of depressurizing and desorbing the first gas adsorbed on the adsorption bed, for which the second depressurization step is completed, and transferring the first gas to the high-pressure product vessel;
a low-pressure cleaning step of transferring a high-concentration first gas of an intermediate storage tank to the adsorption bed to perform low-pressure cleaning;
a first partial pressurization step of transferring the high-concentration first gas of the intermediate storage tank to the adsorption bed to pressurize the adsorption bed;
a second partial pressurization step of connecting the adsorption bed, for which the first partial pressurization is completed, with the adsorption bed, for which the second rinse step is completed, to increase a pressure of the adsorption bed for which the first partial pressurization is completed;
a pressure increasing equalization step of connecting the adsorption bed, for which the second partial pressurization step is completed, with the adsorption bed, in which the depressurization is being performed, to pressurize the adsorption bed for which the second partial pressurization is completed;
and a repressurization step of transferring a gas of the intermediate storage tank to the adsorption bed, for which the pressure increasing equalization step is completed, to pressurize the adsorption bed for which a first pressure increasing equalization step is completed,
wherein, in the second rinse step, the high-purity first gas is introduced into the adsorption bed at a first pressure,
and in the depressurization desorption step, the first gas is introduced into an inlet of a compressor while maintaining a pressure during depressurization, and transferred to the high-pressure product vessel of a pressure higher than the first pressure.

10 more elements

Dependencies are inferred from the claim text.