An Experimental Study On Ammonia Escape And Carbon Dioxide Absorption Based On Ammonia Hyorate System

Ammonia plays an important role in air pollution,and it's a common problem of ammonia escape in the process of desulfurization,denitrification and decarburization with liquid ammonia,thus how to control ammonia escape effectively has been an important issue to solve current environmental problem in china.In this paper,the frequently-used wet desulforization,denitrification and decarburization technology with liquid ammonia were briefly introduced,and the research status of ammonia escape issue at home and abroad was compared and analyzed,which determined absorbing CO2 with liquid ammonia as research object,suppressing ammonia escape as research focus,and experiment as research means to develop research work.It will lay a certain theoretical foundation and provide a necessary technical support for environmental protection in China.This research designed a bubble column system,and built a small experimental platform.Through the debugging and stability analysis the system was able to achieve normal experimental function.In this paper,the removal efficiency of CO2,the rate of ammonia escape,and the overall volumetric mass transfer coefficient of CO2 and NH3 were defined to reflect the CO2 absorption effect and ammonia escape degree under different working conditions.Through the analysis and discussion of the CO2 absorption effect and ammonia escape rule under the working conditions of extremely low and high ammonia concentration and different concentration and types of organic additives,it's found that the ammonia concentration has a decisive influence on the CO2 absorption and ammonia escape:high ammonia concentration is beneficial to CO2 absorption,and low ammonia concentration can reduce ammonia escape;low temperature helps to inhibit ammonia escape,and the removal efficiency of CO2 is slightly enhanced;organic additives with hydroxyl groups can indeed inhibit ammonia escape,but reduce the removal efficiency of CO2 at the same time;with the extension of carbon chain of saturated monohydric alcohol molecule,the hydrogen bond energy and inhibition degree of ammonia escape increases continuously,but it also weakens CO2 absorption effect at the same time;however,with the number of hydroxyl groups increasing,the corresponding effect decreases for the change of solution property.