Catalytic Seawater Flue Gas Desulfurization Process:  An Experimental Pilot Plant Study

Abstract

In previous articles by the authors on seawater S(IV) oxidation kinetics, a significant catalytic effect was demonstrated by means of a commercially available activated carbon. The aims of this study carried out at pilot plant scale were to assess the use of high-efficiency structured packing and to validate the positive results obtained previously in laboratory studies. A comparison between a packed tower and a spray column was made by maintaining the same desulfurization efficiency. A 47% reduction in seawater flow can be obtained with a packed tower. This option seems to be more economical, with a reduction in operation costs of least of 33%. With the appropriate activated carbon, it is possible to reach a greater oxidation rate at a low pH level than by operating conventionally at a high pH level without a catalyst. A preliminary technical and financial comparison between the advanced seawater desulfurization process (equipped with a packed tower and a catalytic oxidation plant) and the conventional process (spray tower and noncatalytic oxidation) was carried out.

SO2Removal by Seawater in a Packed–Bed Tower: Experimental Study and Mathematical Modeling

“…Four levels of temperature are selected in the range of 50-350 • C. The mentioned five factors with their levels are presented in Table 2. 8, 8.5, 9, 9.5 In order to increase the accuracy of the experiments design also observance of the nonlinear behavior of selected factors in the previous works (1,11), here, four levels are considered for each factor. Therefore, the conditions of sixteen tests are presented.…”

“…They found that inorganic and organic additives could increase SO 2 removal efficiency to a certain degree. Vidal et al (1) carried out an experimental study on FGD by seawater in a catalytic packed tower in the liquid to gas ratio range of 4-15 l/m 3 . They used active carbon in packed structure and found that a 47% reduction in seawater flow rate could be obtained in a catalytic packed tower in comparison to a conventional spray tower.…”

π-Hole interaction: a theoretical insight into the mechanism of SO2 captured by [Et2NEMim][Tetz] ionic liquids

“…Thus, finding an effective method to reduce significantly the S-content in fuel oils is very important. In recent years, a number of technologies for flue gases desulfurization (FGD) have been developed, including wet or dry FGD processes [2][3][4][5][6]. Unfortunately, those methods have some obvious disadvantages, such as the production of a large amount of gypsum waste and waste water.…”

Flue gas desulfurization and humidification dehumidification in power plants

“…Ortez et al and Vidal et al studied oxidation kinetics of sulfur by means of a commercially available activated carbon [23,24]. The study was extended to a pilot scale unit to demonstrate the high-effi ciency of structured packing, which reduced the seawater fl ow rate by 47% and the production cost by 33%.…”