STUDY OF DESIGN PARAMETER DETERMINATION IN SO2 ABSORPTION USING SEAWATER ON THE ABSORBER COLUMN

• Main Author: Sri Anik Suci, Kadek
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/74864
• Institution: Institut Teknologi Bandung

One of the technologies used for air pollution control, specifically for the pollutant SO2, is Seawater Flue Gas Desulfurization (SWFGD). So far, most previous studies have focused on examining the influence of various operational variables on the SO2 removal efficiency. However, research specifically targeting the determination of design parameters such as Henry's constant, mass transfer coefficient, L/G ratio, and flooding velocity has been relatively rare, especially in the context of using natural seawater from Indonesia. Therefore, this study was designed with the primary focus and objective of determining these design parameters while also measuring the impact of operational parameters on the SO2 removal efficiency. The study was conducted using a packed tower absorber column with a counter-current flow configuration. The successive variations in seawater flow rate and gas flow rate were within the ranges of 150-250 L/h and 1-10 m3 /h, respectively. The L/G ratio varied from 20.9 to 174.2, while the temperature range was set between 30- 50°C. The research results revealed that as the L/G ratio increased, the SO2 removal efficiency also increased. Conversely, there was an inverse relationship between temperature and removal efficiency. Higher temperatures resulted in lower removal efficiencies. The highest achieved removal efficiency was 100%, while the lowest efficiency reached 74%. The pH of the seawater generated from the absorption process ranged from 3 to 6, with the optimal pH increase occurring when fresh seawater was added at a ratio of 1:2 to 1:3 to the effluent seawater. The obtained Henry's constant value obtained was relatively small compared to the value for freshwater absorbents. Specifically, at a temperature of 30°C, Henry’s constant value was 0.03. On the other hand, the mass transfer coefficient increased with increasing liquid flow rate and gas temperature, with the highest coefficient obtained at a temperature of 30°C and an L/G value of 174.2.