Can complexed iron desulfurization be applied in hydrogenation plants?

The LYSY complexed iron-based desulfurization technology is a wet oxidation method for removing hydrogen sulfide, using complexed iron as a catalyst. It features the direct conversion of H2S in the gas into elemental sulfur; after absorption, the H2S content in the gas is less than 5 ppm. This is a new type of desulfurization technology that is simple to operate, has a high sulfur capacity, and is environmentally friendly and non-toxic. It overcomes the shortcomings of traditional desulfurization processes, such as low sulfur capacity, complex operation procedures, high rates of by-product salt formation, and severe environmental pollution. The sulfur recovery rate exceeds 99.9%, meeting the increasingly stringent environmental standards. The complexed iron desulfurization process is a technical application in which a complexed iron solvent comes into direct contact in reverse flow with hydrogen sulfide-containing gas through bubbling and spraying within a reaction tower. 　　It has the following characteristics: 1. High sulfur capacity. The dynamic sulfur capacity of this desulfurizer can reach 3%-5%, whereas the sulfur capacity of PDS desulfurizers currently in use on site is generally below 0.5%. 　　2. It has a fast absorption reaction rate, 3-5 times that of ordinary desulfurizers. 　　3. It has good selectivity, and carbon dioxide has little impact on the absorption reaction of the desulfurization agent. 　　4. Fast regeneration speed: This product features an extremely fast regeneration speed; the reaction is completed in just a few seconds. In contrast, the conventional desulfurization fluids used in practice have always presented challenges in terms of regeneration speed, and this desulfurization fluid overcomes the limitations associated with the regeneration speed of traditional ones. The reaction time for this design is 50 seconds, which is already quite conservative. 　　5. Strong temperature adaptability. Under environmental conditions of 20–55°C, the efficiency of the absorption reaction and the regeneration reaction remains relatively constant. 　　Generally, when temperatures are low in winter, the water temperature inside the IC tower is usually above 30°C, and the temperature of biogas is not below 28°C. With the help of a pressure booster fan, the biogas temperature should remain above 30°C, and since the lean liquid is reused, its temperature also does not drop too much. It has no effect on the absorption and regeneration rates. 　　Generally, when temperatures are high in summer, the water temperature inside the IC tower can reach up to 38°C, while the temperature of biogas can reach up to 40°C; with the help of a pressure booster fan, the biogas temperature should be around 45°C. Within the optimal range for absorption and regeneration rates. 　　Therefore, only proper insulation of the liquid pipes is required, with no heating measures needed. 　　6. Good stability. Since both the absorption and regeneration processes are primarily chemical reactions, the absorption efficiency is high, the regeneration speed is fast, and no sulfides are distilled off during the regeneration process. 　　7. Low corrosivity; corrosion rate is 0.023 mm/year. 8. Minimal wear and tear. Throughout the entire system, only a small amount of liquid loss occurs, as some liquid is carried away during the separation of sulfur particles. 　　9. The solid and liquid are easy to separate. During the regeneration process, the sulfur particles produced are large, requiring a relatively simple separation process. 　　10. No secondary pollution. During operation, no liquid or solid waste is generated apart from sulfur, thus avoiding secondary pollution.