Catalytic Wet Air Oxidation of Aqueous Solution of Phenol over Pt/CNF Catalysts
Advancing the chemical engineering fundamentals
Catalysis - III (T2-13c)
Keywords: carbon nanofibers, catalytic wet oxidation, kinetic
During the past two decades, carbon nanofibres (CNFs), including multi-walled carbon nanotubes (MWNTs), have attracted extensive interest and attention from both academia and industry. Due to their novel physico-chemical and mechanical properties, CNFs exhibit growing perspectives in a number of potential applications, especially in heterogeneous catalysis (G. Ovejero, 2006).
One of the advantages of CNFs used as catalysts and catalyst supports is the possibility of tailoring their microstructures by proper selection of preparation method and controlling their surface chemistry via surface modification (P. Serp, 2003). The mesoporous macrostructure with relatively high specific surface area and almost completely exposed external surface of these materials can be expected to reduce the inner pore diffusion resistance dramatically during the reaction (J. Garcia, 2006).
Therefore, the aim of this work is the study of the catalytic wet air oxidation (CWAO) of phenol, as model organic compound of many industrial wastewaters, using 2 wt. % platinum supported in commercial CNF as catalyst in a continuous trickled bed reactor.
Samples were taken periodically to measure the phenol conversion and analyze the Total Organic Carbon (TOC).
The effect of process parameter like temperature, pressure, catalyst load, air flow, liquid flow and pollutant concentration, has been studied. The experimental dates were satisfactory fitted to a Langmuir-Hinshelwood kinetic model. The conversion of phenol increases with the temperature, pressure and catalyst load.
It was demonstrated that Pt/CNF is an efficient catalyst for the CWAO of phenol. High phenol conversion and TOC removal can be reached over this catalyst at mild reaction temperature (433 K) and moderate pressure (2.0 MPa).
See the full pdf manuscript of the abstract.
Presented Thursday 20, 15:00 to 15:20, in session Catalysis - III (T2-13c).
