Protonated flue gas desulfurization solvent – what is this environmental-friendly desulfurization reagent?
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Recently, JH-17, a highly efficient and environmentally friendly flue gas desulfurization solvent – a renewable protonated liquid flue gas desulfurization solvent – passed the technical appraisal at the Sichuan Fine Chemicals Research and Design Institute. This new type of desulfurization solvent is capable of absorbing sulfur dioxide from industrial exhaust gases and converting it into useful products such as sulfur and sulfuric acid. It helps companies eliminate environmental pollution while also generating economic benefits for them. This technology has attracted widespread attention from flue gas desulfurization enterprises such as steel mills and power plants. The main principle of this technology is to use a desulfurization solvent to absorb sulfur dioxide from flue gas in an absorption tower; in a stripping tower, the sulfur dioxide absorbed by the desulfurization solvent is released under the effects of increased temperature and stripping, thereby producing high-purity sulfur dioxide gas. The desulfurization solvent, after being processed, enters the absorption tower to absorb sulfur dioxide gas from the flue gas, thereby enabling the cyclic regeneration of the desulfurization solvent and continuous removal of sulfur dioxide gas from the flue gas. It is said that the JH-17 renewable protonated liquid flue gas desulfurization solvent has been successfully applied in a flue gas purification unit with a capacity of 2000 Nm3/h, achieving satisfactory results. This solvent achieves a SO2 removal rate of ≥99% in flue gas, with the SO2 content in the purified gas being ≤50 mg/Nm3. It has a wide operating range for desulfurization, and the removed SO2 can be fully recovered to produce industrial materials with a concentration of over 99%. Does anyone know about this news? Could they give an evaluation on it – how is it really? Are we considering the desulfurization issue now? I’m seeking advice.
Experts, please offer your advice; we are eager to learn about the new developments
This post was last edited by ray1513 on 2012-4-21 08:26. The cyclic amine desulfurization method was originally invented by the Canadian company Cansolv; it belongs to the category of wet desulfurization methods； Later, the West China Institute of Chemical Engineering in Chengdu filed a patent in China titled \"Ion Liquid Circulating Desulfurization.\" The principle is the same: an organic amine (a molecule larger than inorganic NH3 and less prone to volatilization and loss) is used in its cationic solution to form a buffer that absorbs SO2 – it is an exothermic reaction ； The resulting rich liquid is used in a desorption unit to release SO2 again through high-temperature steam – an endothermic reaction. The key lies in the selectivity of the absorbent solution for SO2. Because exhaust gases contain many components, all acidic gases such as NO and CO2 are absorbed. There is also the absorption capacity of the absorbent: a circulation medium with a large capacity requires less energy, as does the energy needed for stripping. Furthermore, during long-term operation, the circulating amine solution requires a purification device to remove impurities such as those that have absorbed other acidic gases or solid dusts. Based on its principle, it requires relatively high standards for the gases it can handle: first, the composition and flow rate must be fairly stable ； Second, the less dust and other impurities, the better–otherwise it places too much strain on the kidneys ； Third, there needs to be a sulfuric acid unit that can consume SO2, or a unit that neutralizes hydrogen sulfide to produce sulfur (which is quite expensive); otherwise, should SO2 be compressed into a liquid state?