Current methods for desulfurization

http://bbs.hcbbs.com/thread-92610-1-2.html contains a comparison of several desulfurization processes that I posted earlier; you can use it as a reference, though it’s quite simple and lacks detailed explanations. This post was last edited by qihongtu on 2007-11-23 14:40]

There is also the method of using soda ash along with an 888 catalyst for stream separation, and the results are quite good

The latest example is Chengdu West China Chemical’s technology for \"removing and recovering SO2 from flue gas using the ionic liquid recycling method\"； This technology has two notable features: First, a circular economy: 1. The ionic liquid used for desulfurization can be regenerated and reused within the system; it has a long lifespan and is hardly consumed during the desulfurization process! 2. The desulfurization by-product is mainly pure gaseous SO2, with a purity of over 99%. The recovered SO2 can be used as a raw material for producing high-value sulfided products, enabling a circular economy that transforms waste into assets. 3. The water in the system can be circulated in a closed loop without being discharged outside. II. Green 1. During the desulfurization process, no new gas pollutants such as CO2 and NH3 are generated ； The solid waste generated during the desulfurization process is mainly solid dust from the preceding system, which can be utilized comprehensively depending on the circumstances ； The water in the system is circulated in a closed loop, with only a small amount of wastewater being discharged; this wastewater can be treated centrally. 2. Ionic liquids are non-flammable, non-explosive, and have no odor ； Does no harm to the human body ； In my opinion, this technology should be the direction for the future development of desulfurization and denitration!

There are also seawater desulfurization, the semi-dry circulating fluidized bed method, the sodium sulfide-based recovery-type desulfurization method, the resource-saving biological desulfurization method, and the double-alkali desulfurization method. In short, there are many methods, each with its own advantages and disadvantages. It is necessary to adapt measures to local conditions and tailor solutions accordingly.

There is also calcium injection inside the furnace along with tail section humidification and activation; LIFAC has engineering examples from the Xiaguan Power Plant in Nanjing

Thermal and cold methods, dry and wet methods, chemical and physical methods in chemical engineering systems