This regenerative-amine process is highly suitable for bulk and deep carbon dioxide (CO2)-removal from gas streams. It also removes hydrogen sulfide (H2S), some COS and mercaptans from natural gas, refinery gas and synthesis gas. Hydrogen sulfide can be reduced to low-sulfur levels. This process achieves a higher loading capacity and reduced equipment size compared to general aqueous amine solvents.
The ADIP-X process uses aqueous solutions of the tertiary amine, methyl diethananolamine and an additive. Amine concentrations up to 50%wt can be applied. The process has low observed corrosion rates and a controllable foaming tendency of the solvent due to an optimized design. Its lineup can be very diverse, depending on the application. High integration of separate process units is possible. The simplest system resembles those of other amine processes. Common regeneration for separate amine absorbers is often applied and may consist of one or more flash/steam strip regeneration steps. Solvent composition will be optimized for customer requirements.
Operating conditions: A very wide range of treating pressures and contaminant concentrations can be accommodated. Carbon dioxide specifications below 50 ppmv in gas streams can be met. Hydrogen sulfide specifications down to 100 mbar are also achievable. Bulk CO2 removal from a high percentage to several percentage points is easily attained.
Licensor: Shell Global Solutions International B.V.