scholarly journals Removal of Formaldehyde by CWO

Proceedings ◽  
2018 ◽  
Vol 2 (23) ◽  
pp. 1471
Author(s):  
Estefania Rodríguez-Carrasco ◽  
Mirella Gutiérrez-Arzaluz ◽  
Violeta Mugica-Álvarez ◽  
Miguel Torres-Rodríguez
Keyword(s):  
Oxidation Reaction ◽  
Mixed Oxides ◽  
Reaction System ◽  
Alpha Phase ◽  
Phase Reaction ◽  
Tertiary Treatment ◽  
Catalytic Wet Oxidation ◽  
Three Phase ◽  
Aqueous Effluents

A large part of the wastewater generated by the Chemical and Transformation Industries are discharged with the presence of organic pollutants, in many cases they contain refractory organic compounds such as formaldehyde in a very low concentration for their recovery to be profitable, but it is high enough for to constitute a source of important pollution, which causes a loss of biodiversity and retards sustainable development. In the present work, the elimination of formaldehyde by the catalytic wet oxidation reaction is evaluated as part of the tertiary treatment of aqueous effluents in a three-phase reaction system, using copper and cobalt mixed oxides catalysts supported in alumina (alpha phase), the results of the characterization of the catalyst used are also shown, by conventional techniques.

scholarly journals Pilot scale experiments of magnesia hydration under gas-liquid-solid (three-phase) reaction system

2017 ◽  
Author(s):  
Xiaojia Tang ◽  
Qiwei Lv ◽  
Lin Yin ◽  
Yixing Nie ◽  
Qi Jin ◽  
...  
Keyword(s):  
Reaction System ◽  
Pilot Scale ◽  
Phase Reaction ◽  
Three Phase

The analysis of magnesium oxide hydration in three-phase reaction system

2014 ◽  
Vol 213 ◽  
pp. 32-37 ◽  
Author(s):  
Xiaojia Tang ◽  
Lin Guo ◽  
Chen Chen ◽  
Quan Liu ◽  
Tie Li ◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Reaction System ◽  
Phase Reaction ◽  
Three Phase

scholarly journals Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO2/GAC

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3448
Author(s):  
Cristian Ferreiro ◽  
Natalia Villota ◽  
José Ignacio Lombraña ◽  
María J. Rivero
Keyword(s):  
Reaction System ◽  
Catalytic Ozonation ◽  
Kinetic Constants ◽  
Catalyst Loading ◽  
Solid Catalyst ◽  
Order Kinetic ◽  
Phase Reaction ◽  
Reaction Products ◽  
Heterogeneous Catalytic ◽  
Three Phase

This work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO2. Aniline was selected as a model compound for the accelerator manufacturing industries used in the manufacture of rubber due to its environmental impact, low biodegradability, and harmful genotoxic effects on human health. Based on the evolution of total organic carbon (TOC), aniline concentration measured using high performance liquid chromatography (HPLC), pH and ozone concentration in liquid and gas phase, and catalyst loading, a three-phase reaction system has been modelled. The proposed three-phase model related the ozone transfer parameters and the pseudo-first order kinetic constants through three coefficients that involve the adsorption process, oxidation in the liquid, and the solid catalyst. The interpretation of the kinetic constants of the process allowed the predominance of the mechanism of Langmuir–Hinshelwood or modified Eley–Rideal to be elucidated. Seven intermediate aromatic reaction products, representative of the direct action of ozone and the radical pathway, were identified and quantified, as well as precursors of the appearance of turbidity, with which two possible routes of degradation of aniline being proposed.

Characterization of ionic liquid-based biocatalytic two-phase reaction system for production of biodiesel

AIChE Journal ◽  
2010 ◽  
Vol 57 (6) ◽  
pp. 1628-1637 ◽  
Author(s):  
B. L. A. Prabhavathi Devi ◽  
Zheng Guo ◽  
Xuebing Xu
Keyword(s):  
Ionic Liquid ◽  
Reaction System ◽  
Phase Reaction ◽  
Two Phase

Overall Effectiveness Factor for Slab Geometry in a Three-Phase Reaction System

2014 ◽  
Vol 12 (1) ◽  
pp. 417-427 ◽  
Author(s):  
Diego E. Boldrini ◽  
Gabriela M. Tonetto ◽  
Daniel E. Damiani
Keyword(s):  
Reaction System ◽  
Effectiveness Factor ◽  
Phase Reaction ◽  
Slab Geometry ◽  
Reaction Systems ◽  
Mixed Control ◽  
Three Phase ◽  
Power Law Kinetics ◽  
Theoretical Results ◽  
Overall Effectiveness

Abstract The overall effectiveness factor for slab geometry applicable to uniform washcoats on a monolith surface for three-phase reaction systems was studied in the present work. Analytical solutions for zero-order reactions and Langmuir–Hinshelwood and power law kinetics were reported. The analysis of the theoretical results showed that not considering the geometry of the monolithic system in a proper way lead to 14% errors in reactions parameters when operating under mixed control (kinetic-internal diffusion) and negligible external mass-transfer resistances.

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