Centrifugal Fluid Separation technology, in particular Supersonic Gas Separation (SGS), is one of the potential technologies considered for offshore CO₂ capture. SGS has advantages in terms of CAPEX, hydrocarbon losses, footprint, tonnage and power requirement compared to conventional solutions such as membrane. Even though the technology has been developed since 1989, the applications are limited to mainly dehydration and hydrocarbon dew pointing. For CO₂ separation from natural gas, substantial development works are needed prior to the field application as there are a lot of uncertainties in the feed conditions to be tackled. In particular, the stringent requirements of cryogenic temperature, high pressure and inlet CO₂ composition of its feed require a robust feed conditioning process plant. For a relatively new technology such as SGS for CO₂ removal application, it is crucial to investigate and assess the variations of feed and process conditions i.e. temperature, pressure and gas compositions prior to being applied at actual field, as these will impact the CO₂ separation performance inside the separator. Hence, this paper investigates the control strategies for the SGS feed conditioning plant subjected to ±15 % disturbances in temperature and pressure, and ±5 mol% variations in feed CO₂ composition. Results show that effective disturbances elimination in the first flash separator of the feed conditioning plant is crucial in minimizing the impact to the SGS operation. A comparative study reveals that standard PID controller performs significantly better in disturbance rejection than Model Predictive Control.

离心流体分离技术，特别是超音速气体分离（SGS），是考虑用于海上CO ₂捕集的潜在技术之一。与常规解决方案（例如膜）相比，SGS在CAPEX，碳氢化合物损失，足迹，吨位和功率需求方面具有优势。尽管该技术自1989年以来就已开发，但其应用仅限于脱水和碳氢化合物露点。对于从天然气中分离CO ₂，在现场应用之前需要进行大量开发工作，因为要解决的进料条件存在很多不确定性。特别是对低温，高压和进口CO ₂的严格要求饲料的组成需要强大的饲料调节加工厂。对于相对较新的技术（例如用于CO ₂去除的SGS），至关重要的是在实际应用之前研究和评估进料和工艺条件（例如温度，压力和气体成分）的变化，因为这些都会影响CO _2。分离器内部的分离性能。因此，本文研究了SGS进料调理设备的控制策略，该设备受到温度和压力±15％的干扰以及进料CO _2的±5 mol％变化作品。结果表明，在进料调节设备的第一个闪蒸分离器中，有效消除干扰对于最大限度地减少对SGS操作的影响至关重要。一项比较研究表明，标准PID控制器在干扰抑制方面的性能明显优于模型预测控制。