Catalytic Wet Oxidation of Ferulic Acid (A Model Lignin Compound) Using Heterogeneous Copper Catalysts

2007 ◽  
Vol 46 (25) ◽  
pp. 8652-8656 ◽  
Author(s):  
Suresh Bhargava ◽  
Harit Jani ◽  
James Tardio ◽  
Deepak Akolekar ◽  
Manh Hoang
Keyword(s):  
Ferulic Acid ◽  
Copper Catalysts ◽  
Wet Oxidation ◽  
Catalytic Wet Oxidation ◽  
Model Lignin Compound

Catalytic wet oxidation of ferulic acid

2008 ◽  
Vol 9 (1) ◽  
pp. 87 ◽  
Author(s):  
Harit Jani ◽  
Suresh K. Bhargava ◽  
James Tardio ◽  
Deepak B. Akolekar ◽  
Manh Hoang
Keyword(s):  
Ferulic Acid ◽  
Wet Oxidation ◽  
Catalytic Wet Oxidation

MnCu Oxides for Wet Oxidation of Orange II

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Isabel M. L. Castelo-Branco ◽  
Regina C. Santos ◽  
Rosa M. Quinta-Ferreira
Keyword(s):  
Azo Dye ◽  
Dye Degradation ◽  
Copper Catalysts ◽  
Operating Conditions ◽  
Wet Oxidation ◽  
Orange Ii ◽  
Catalyst Poisoning ◽  
Catalytic Wet Oxidation ◽  
Molar Ratios ◽  
Toc Removal

The catalytic wet oxidation of an azo dye was investigated at 180°C and 15 bar of oxygen partial pressure. The effects of different catalysts were examined under operating conditions selected in pre-runs of non-catalytic oxidation and thermolysis (absence of oxygen). Manganese - copper catalysts with different molar ratios were tested and MnCu5 (50% Mn and 50% Cu) was found to be the most effective, giving almost complete dye degradation and 56.8% TOC removal after 60 minutes of reaction. Moreover, this catalyst revealed to be stable regarding metal leaching and catalyst poisoning due to sulphur or carbon depositions.

Mass Transfer Limited Wet Oxidation in Trickle-Bed Reactor

1998 ◽  
Vol 63 (11) ◽  
pp. 1938-1944 ◽  
Author(s):  
Vratislav Tukač ◽  
Jiří Vokál ◽  
Jiří Hanika
Keyword(s):  
Supported Catalyst ◽  
Reaction Rates ◽  
Gas Transfer ◽  
Wet Oxidation ◽  
Reactor Performance ◽  
Catalytic Wet Oxidation ◽  
Environmental Application ◽  
Trickle Bed Reactor ◽  
Fine Glass ◽  
Trickle Bed

Catalytic activity of CuO-supported catalyst in phenol oxidation, and the influence of reaction conditions, viz. temperature (125-170 °C), oxygen partial pressure (1-7 MPa) and liquid feed (30-760 ml h-1), in the continuous operation using 17.9 mm i.d. trickle-bed reactor is presented. The hydrodynamic impact on the three-phase trickle-bed reactor performance in an environmental application of catalytic wet oxidation was also investigated. The results of trickle-bed operation were strongly influenced by wetting efficiency. An insufficient catalyst wetting can be to compensated by filling the catalyst bed voids by fine glass spheres. In the case of the gas transfer limited reaction, a better wetting of the catalyst can lead to worse reactor performance due to lower reaction rates.

Selective Organic Removal from the Alumina Industrial Liquor:  Wet Oxidation and Catalytic Wet Oxidation of Disodium Malonate

2002 ◽  
Vol 41 (5) ◽  
pp. 1166-1170 ◽  
Author(s):  
Sharon Eyer ◽  
Suresh Bhargava ◽  
James Tardio ◽  
Deepak B. Akolekar
Keyword(s):  
Wet Oxidation ◽  
Catalytic Wet Oxidation ◽  
Organic Removal

scholarly journals Catalytic wet oxidation of high concentration pharmaceutical wastewater with Fe3+ as catalyst

2018 ◽  
Vol 2017 (3) ◽  
pp. 661-666
Author(s):  
Xu Zeng ◽  
Jun Liu ◽  
Jianfu Zhao
Keyword(s):  
Oxygen Pressure ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Kinetic Studies ◽  
Cod Removal ◽  
Wet Oxidation ◽  
Catalytic Wet Oxidation ◽  
Pharmaceutical Wastewater ◽  
High Concentration ◽  
Temperature Time

Abstract Catalytic wet oxidation of high concentration pharmaceutical wastewater with Fe3+ as catalyst was carried out in a batch reactor. Results showed that the degradation of pharmaceutical wastewater was enhanced significantly by Fe3+. The effects of reaction parameters, such as the catalyst dose, reaction temperature, time, and initial oxygen pressure, were discussed. The chemical oxygen demand (COD) removal increased with the increases of catalyst dose, temperature, time and oxygen supply. With the initial COD 34,000–35,000 mg/L, approximately 70% COD removal can be achieved under the conditions of catalyst 1.0 g and oxygen pressure 1.0 MPa at 250 °C after 60 min. The results of kinetic studies showed that two reaction steps existed in this oxidation process, which followed an apparent first-order rate law. This process provides an effective approach for the pretreatment of high concentration pharmaceutical wastewater.

The effect of reaction conditions on the apparent deactivation of Ce–Zr mixed oxides for the catalytic wet oxidation of phenol

2012 ◽  
Vol 180 (1) ◽  
pp. 25-33 ◽  
Author(s):  
J.J. Delgado ◽  
X. Chen ◽  
J.A. Pérez-Omil ◽  
J.M. Rodríguez-Izquierdo ◽  
M.A. Cauqui
Keyword(s):  
Mixed Oxides ◽  
Wet Oxidation ◽  
Catalytic Wet Oxidation ◽  
Reaction Conditions ◽  
Oxidation Of Phenol
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