Amine solutions are used to remove CO 2 in various areas ranging from natural gas production to the food and beverage industry [1]. Monoethanolamine (MEA), diethanolamine (DEA), and N-methyldietahnolamine (MDEA) are well-known chemical solvents used for removing sour gases from process gas streams [2,3]. As the reduction of greenhouse gases gains importance, the use of amines and alternative solvents for CO 2 post combustion carbon capture (PCCC) is a significant area of research and development. Among the various approaches to separate CO 2 from flue gas, the absorptionbased CO 2 capture technology is known to be the most practical method due to its technical maturity and large capacity for treating large gas volumes [4][5][6]. The ability to retrofit to existing power plants is also a strength of liquid absorbent-based PCC technologies.
Photo-thermo-catalytic or PTC purification of process gasses (i.e., air, flue gases, and others) from NOx is presented in this study. A discussion of temperature’s role in photocatalytic NOx removal and the progress of photo-thermo-catalytic reactors for the NOx removal process are presented. Lab- and pilot-scale reactors are described. The impact of temperature on the photocatalytic conversion of hydrocarbons is analyzed with regard to its relation to the photocatalytic selective reduction of NOx (photo-SCR). Another important issue is light transfer in pilot-scale reactors due to the sensitivity of light sources to temperature. Examples of light transfer solutions in photo-thermo-catalytic reactors are presented. Finally, the further development of photo-thermo-catalytic reactors is discussed, including pressurized systems.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.