SPLIT LINE SYSTEM, METHOD AND PROCESS FOR CO2 RECOVERY

摘要

A process, system or apparatus for recovering C02 from a gas has an absorption section, cooling section, regeneration section and more than three heating sections and involves a split in the C02 rich stream from the first heating section. A solvent for recovering C02 from a gaseous mixture comprising a primary amino hindered alcohol or tertiary amine in combination with a derivative of piperazine with three or more amino groups as promoter and a carbonate buffer is also disclosed.

主权项

1. An apparatus for recovering C02 from a gas containing C02, comprising:
(a) an absorption section comprising (i) an absorption tower having a top portion and a bottom portion (ii) a liquid feed where the gas contacts the liquid fed to form a C02-rich solution, (b) a cooling section where a C02 semi-rich solution is extracted downstream of the absorption section using a cooling medium and pumped back to the absorption section between the first point and the second point of the absorption tower, (c) a regeneration section having a regenerator where the C02 rich solution is heated utilizing the heat from steam and to produce a C02 lean solution, (d) a first heating section, (e) a second heating section where a portion of C02 rich solution gets heated with the C02-lean solution coming from the regenerator, (f) a third heating section where steam is supplied to heat the C02-rich solution traveling from the regenerator to further remove C02 and produce a leaner C02 solution and whereby steam condensate is produced from the steam due to loss of heat from the steam, and (g) a fourth heating section where a portion of the C02-rich solution gets heated with the steam condensate from the third heating section.