Technologies and costs of SO2-emissions reduction for the energy sector

XPS and SEM study of calcite bearing rock powders in the case of reactivity measurement with HCl solution

“…Sulphur dioxide removal efficiency of flue gas desulphurisation commonly varies from 50% with some dry sorbent injection processes [3] to 99% in some wet FGD processes, as claimed in Ref. [4] In general, wet FGD processes are more efficient in SO 2 removal than dry processes, but it is often tempting to use the latter ones because of their lower capital cost, [5] especially if the power plant is in operation for only a few more years. The most common and efficient flue gas desulphurisation method is absorption of SO 2 in a limestone slurry, known as wet scrubbing, which is obtained according to the reaction …”

“…where CaSO 4 •2H 2 O(s) stands for gypsum. [2] The aim of this study is to characterise some natural calcareous rocks and limestones, and analyse their potential use in wet flue gas desulphurisation via dissolution experiments.…”

Optimization of a Pilot‐Scale Amine Scrubber to Remove SO2: Higher Selectivity and Lower Solvent Consumption

“…The clean gas entering the atmosphere contained around 0.05-0.10 % SO 2 . The absorbent was saturated with SO 2 with a concentration of 130-180 g L -1 and then pumped to a Raschig ring-packed stripping column in which SO 2 was removed by heating up to a temperature of 95-100°C via indirect heating in a reboiler [15,16].…”

“…The use of xylidine was advantageous and economic in low gas con- centrations. ASARCO employed chemically pure nitrogen, commercial-grade N-dimethylaniline, as the absorbing liquid [15][16][17].…”

“…The CO 2 content is usually several times higher than the SO 2 content and the current technologies absorb both SO 2 and CO 2 gases simultaneously. A large amount of amine, or any other absorbent, is required to remove these two gases [16].…”