abstract

• In this paper, solar photodegradation of caffeine in aqueous solution was studied, this organic compound is the most consumed stimulant around the world. The degradation experiments were carried outdoors in a solar reactor and Evonik-Degussa P25 TiO2 was used as catalyst. The photochemical and photocatalytic effect were tested in aqueous solutions of caffeine. Experimental results indicate that the organic compound is easily degraded over a very short period of time using 0.5g L-1 of catalyst. The kinetic analysis indicates that the initial reaction rate of caffeine is described by the LH-HW model. However, the original compound cannot be mineralized very fast, caffeine is converted to other organic compounds with a longer lifetime before the mineralization, converting caffeine CO2 and water. © 2018 Walter de Gruyter GmbH, Berlin/Boston.

authors

• Galicia A.
• Luna R.A.
• Moctezuma Velázquez Edgar
• Ortiz N.
• Sandoval F.
• Solis C.
• Zermeño B.B.

publication date

• 2018-01-01

published in

• International Journal of Chemical Reactor Engineering  Journal

keywords

• caffeine; degradation with TiO2; microcontaminant; solar photocatalysis Catalysts; Organic compounds; Phosphorus compounds; Solar equipment; Solutions; Titanium dioxide; Kinetic analysis; Microcontaminant; Photo catalytic degradation; Photocatalytic effect; Short periods; Solar photocatalysis; Solar photodegradation; Solar reactors; Caffeine

Digital Object Identifier (DOI)

• 10.1515/ijcre-2017-0126

start page

end page

volume

• 16

issue

• 10