Experimental Investigation On Carbon Dioxide Absorption By Aqueous Ammonia In Dual-Path Reactor

Carbon dioxide is sort of important greenhouse gas. Globally, coal combustion, chemical engineering and productivity are three main carbon sources, which are also the direct inducing elements of greenhouse phenomenon. It has been rising as the focuses of related researching realm that alkaline solvent is used for removing carbon dioxide discharged from power plant. A series of technological theories in adopting aqueous ammonia as solvent have been illustrated, in the face of the traits of carbon dioxide and its power plant post-combustion removal.This article is based on the kinetic equilibrium among ammonia species and CO2 in aqueous atmosphere, and the double membrane mass transfer theory, taking into consideration the batch scale experimental setups and industrial practice. By evaluating two types of gas-liquid contactor separately and combined them organically as a whole, a dual-path experimental site has been built. Thus, it is possible to investigate on the operating parameters and extrapolation toward industrial scale. In this research, it is indicated that falling film column could be adopted in the research on interfacial reaction kinetics and multi-phase mass transfer; packed tower offers a sound platform for the research on this chemical procedure, which is also beneficial for the extrapolation to industrial use. The specialty and main advantage of dual-path system lies on its maximization for absorbing efficiency and optimization of the system that may prevent from the potential crystallization phenomenon.Aiming at the industrial implementation of CO2 removal by aqueous ammonia, this article initiated experimental research on the effects of operating parameters on removal efficiency and liquid phase content, based on the co-current falling film reactor, counter-current packed column and their combination.