Abstract Summary (Max 250 words)
Gas scrubbing plays a critical role in ensuring clean industrial emissions and meeting increasingly stringent environmental regulations. Maximizing its performance depends strongly on the efficiency of the underlying mass transfer processes. The utilization of static mixers is known to significantly enhance efficiency of such processes. Sulzer has long-standing expertise in designing high‑performance scrubbing systems for removing species such as H₂S, SO₂, and acids from gas streams. Sulzer's SMVTM static mixer technology offers particularly attractive characteristics for this application, providing high interfacial contact area and efficient mass transfer in a compact configuration. The combination of high F-factor capability and short installation length enables dramatic footprint reduction compared to packed columns, while the technology exhibits superior tolerance to ash and particulate matter, eliminating the need for upstream wash sections. The vertical in-line configuration with co-current downward flow and spray nozzle liquid introduction further simplifies system design. Recently, Sulzer’s R&D performed extensive CO₂ absorption tests using NaOHaq, covering a wide range of gas and liquid loads, droplet size measurements, concentration analyses, and pressure‑drop characterization that demonstrate the efficiency of the Sulzer mixers for gas scrubbing applications. Furthermore, to complement the experimental work, computational fluid dynamics (CFD) simulations provided further insight into the main driving forces of the flow and identified the fundamental mechanisms responsible for mass transfer. This presentation examines Sulzer's systematic approach to advancing static mixer scrubbing performance through integrated experimental, computational, and analytical methods. The experimental program encompasses a purpose-built pilot facility designed to characterize mass transfer performance across industrially relevant operating conditions. Key experimental aspects include advanced droplet size characterization, real-time concentration measurement techniques, pressure drop quantification, and the operational challenges encountered when working with reactive liquid-gas systems. Complementing the physical testing, computational fluid dynamics simulations provide fundamental insight into the flow physics governing mass transfer, including interfacial area generation mechanisms, local concentration gradients, and droplet-gas interaction dynamics. A critical enabler of this development effort is the integration of structured data management practices that allow systematic correlation of experimental observations with CFD predictions, accelerating the identification of performance-limiting factors and optimization pathways. This multi-disciplinary approach demonstrates how combining physical experimentation, numerical simulation, and data-driven analysis accelerates technology development cycles while building fundamental process understanding that extends beyond individual test conditions to inform broader design principles for static mixer scrubbing systems.
