Simulated moving bed system for CO2 separation, and method of same

A simulated moving bed system, comprising:

• a first fixed sorbent bed comprising an alkalized sorbent, a first port at an end of the first fixed sorbent bed, and a second port at an end of the first fixed sorbent bed distal to the first port;
• a second fixed sorbent bed comprising the alkalized sorbent, a third port at an end of the second fixed sorbent bed, and a fourth port at an end of the second fixed sorbent bed distal to the third port;
• a third fixed sorbent bed comprising the alkalized sorbent, a fifth port at an end of the third fixed sorbent bed, and a sixth port at an end of the third fixed sorbent bed distal to the fifth port,
• an adsorption zone and a desorption zone;
• a CO2 feed stream, a steam stream, a CO2-depleted stream, a CO2-enriched stream, and a purge stream;
• a series of valves and lines fluidly interconnecting the first fixed sorbent bed, the second fixed sorbent bed, the third fixed sorbent bed with the CO2 feed stream, the steam stream, the CO2-depleted stream, the CO2-enriched stream, and the purge stream via the first, second, third, fourth, fifth, and sixth ports;
• and
• wherein the system operates under substantially constant pressure and constant temperature with neither temperature swing nor pressure swing,
• wherein the alkalized sorbent comprises a substrate and at least one alkali or alkaline earth component in an amount of at least about 7 weight percent of the alkalized sorbent, and
• wherein the desorption zone is configured for a concentration swing and a desorptive displacement, the concentration swing comprising partial pressure purge desorption and the desorptive displacement comprising an adsorbed CO2 molecule being displaced from the sorbent by steam.