The Research Of CuO/Al₂O₃ Catalyst-sorbents Desulfurization Of Flue Gas And Regeneration

Coal is the primary fuel resource for electric power, a majority of coal is used through combustion. When coal burns and releases energy, it also gives birth to exhaust gas, such as SO₂. So it is necessary to carry through flue gases desulfurization (FGD) . At present the technology of flue gases desulfurization is the widest by use and has the highest efficiency of desulfurization, it is also an important method to control SO₂ emission, depollute atomosphere and protect entironment. Since getting mature, the dry or wet limestone(lime)-gypsum FGD process, the spray drying absorption FGD process and the process of injecting sorbents into boiler furnace or flue, with their different degrees of pitfalls, have confronted with the problem of application in China to the end. The combined SO₂/NOx removal technology is illuminated with a widened road of application. Beacause of high sulfur content, no pulverization, simultaneously removing SO₂ and NOx from flue gases, activated and easy regenerated, CuO/Al₂O₃ catalyst-sorbents system is a hotspot of research in the domestic and the foreign. In other countries though the research and development of the copper oxide process has been becoming mature, its commercialization has a long way to go. In China, we are just to start the research on this technology, hence, to study on the processes in which how does CuO take effectiveness on the desulfurization, denitration and regeneration processes in detailed and quantitative description, and to solve the problems during this technology being applied for the commercialized production, are becoming a request of exigency in development of simultaneously removing SO₂ and NOx technology.Put forward a new idea in this paper that make the CuO/Al₂O₃ FGD reactor using ceramic carrier, and begin the numerical simulation study based on it. In the first depart of this paper, numerical simulation was done for desulfurization process in micro-channel, influence of relational factors on desulfurization effect was studied by the numbers and got conclusions as: temperature field distribution and velocity field distribution in the reactor; inlet velocity of flue gas is one of the primary factors impact the surface catalyst reaction rate; desulfurization rate will increase as the temperature increased at the range of 473-773 K, but it is not a good idea that increase the desulfurization rate by increasing the temperature infinitely, because this reaction is a exothermic reaction, must be sure that the top temperature of the reactor under the carrier agglomeration temperature; desulfurization rate will decrease obviously as the diameter of channel increased but increase as the length of channel increased;...