- 147 - Tail Gas SO2 Scrubbing using fluidized Bed Technology KIM NIKOLAISEN* 1 , ANDRÉS MAHECHA-BOTERO NORAM Engineering and Constructors Ltd Vancouver, Canada DAVID MISSIONS Osprey Corporation Kent, UK HOWARD DAVIS Fluid Technologies (Environmental) Ltd Surrey, UK Many sulphuric acid plants around the world are facing increased pressure from environmental agencies and stakeholders to reduce emissions in the form of SO 2 and sometimes H 2 SO 4 . It is the standard to measure and report these emissions during continuous operation, but many producers are also experiencing increasingly stringent emission targets for the duration of plant start-up. During plant start-up many plants experience spikes in SO 2 concentrations, and the “blue smoke” or stack opacity from SO 3 slippage can be another concern. Tail gas scrubbing processes are a proven way of reducing SO 2 emissions during both continuous and start-up operations. However, most scrubbing technologies will only remove SO 2 and may have to rely on additional downstream technologies such as high-efficiency Brownian diffusion mist eliminators or wet electro static precipitators (WESPs) to remove fine acid mist aerosols i.e. “blue smoke”. The TurboScrubber® fluidized bed technology, licensed by NORAM, 1 Corresponding author. email: knikolaisen@noram-eng.com