Deep CO2 Removal

Deep CO₂ Removal refers to processes that aim to reduce the CO₂ content of treated gas to tens or hundreds of parts-per-million.  Examples are LNG production (< 50 ppmv), ammonia syngas generation (< 500 ppmv) and hydrogen production (< 100s ppmv, depending on the final use).

The most commonly-used solvent is MDEA promoted containing modest concentrations of piperazine (2 – 14 wt%).  Deep CO₂ removal and CO₂ capture have radically different objectives and, therefore, may use very different solvents in individually unique process configurations.  The former treats high pressure gases; the latter with gases at pressures not much above atmospheric pressure.  This itself leads to quite different process characteristics.  Learn more here about deep CO₂ removal in LNG facilities.