Carbon capture and high-capacity supercritical fluid processing with supersonic separator: Natural gas with ultra-high CO2 content

Advances in Carbon Management Technologies

“…For CO 2 removal from NG, the SS feed should be at higher pressures and lower temperatures relatively to ordinary NG WDPA and HCDPA SS applications. An advantage of SS compared to other CO 2 capture technologies is that SS retains performance when CO 2 content rises, being applicable to CO 2 -rich streams (Arinelli et al, 2019).…”

“…Hammer et al (2014) studied the viability of using SS for CO 2 removal from gas turbine flue-gas in FPSOs, which is the downmost step in the CO 2 -rich NG to energy supply-chain, showing successful capture of CO 2 in three different systems. A more complete sequence of developments on SS process simulation is related to the Brazilian pre-salt context (Machado et al, 2012;Arinelli et al, 2017;de Medeiros et al 2017;Teixeira et al, 2018;Brigagão et al, 2019;Arinelli et al, 2019;de Medeiros et al, 2019), bearing more than 45% of CO 2 in the gas, with two pending Brazilian patents (Teixeira et al, 2017;Brigagão et al, 2017). Arinelli et al (2017) developed and used a Unit Operation Extension (UOE) simulating SS (SS-UOE) for the HYSYS process simulator (ASPENTECH Inc.), which simulates SS considering phase-equilibria sound speed (to precisely calculate Ma) determination based on rigorous thermodynamics for predicting phase behavior inside the equipment ( de Medeiros et al 2017).…”

“…The disadvantages are MPs sensitivity to cold temperatures and losing part of the MP modularity. Arinelli et al (2019) applied the SS process in offshore NG processing with ultra-high CO 2 content (> 60%mol) for dew-point adjustments and decarbonation on a floating-hub processing 50 MMsm³/d of CO 2 ultra-rich gas, reinjecting 96% of treated CO 2 -rich gas for enhanced oil recovery, while reserving 4% as fuel-gas upgraded to 20%mol CO 2 for power production. The best economic performance of SS alternative compared to SS followed by MP reflects its highest revenues from recycling condensate from the 1st SS unit, entailing 18% higher oil production.…”