Factors influencing catalytic wet peroxide oxidation of maleic acid in aqueous phase over copper/micelle templated silica-3-aminopropyltrimethoxysilane catalyst

2009 ◽  
Vol 60 (10) ◽  
pp. 2621-2627
Author(s):  
Lilian Daniel ◽  
Jamidu H. Y. Katima
Keyword(s):  
Aqueous Phase ◽  
Maleic Acid ◽  
Atmospheric Pressure ◽  
Batch Reactor ◽  
Copper Catalyst ◽  
Catalyst Loading ◽  
Peroxide Oxidation ◽  
Feed Concentration ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation

Catalytic wet peroxide oxidation (CWPO) of initial maleic acid feed concentration (0.005 to 0.03 M) was carried out in a temperature range of 20–50°C, on micelle templated silica-3-aminopropyltrimethoxysilane (MTS-AMP) supported copper catalyst. The influence of various operating parameters such as initial feed concentration of maleic acid, temperature, catalyst loading and the stability of the catalyst were investigated. CWPO reactions were performed in a stirred batch reactor at an atmospheric pressure in the presence of H2O2 as an oxidant. Total conversion of maleic acid into acetic acid was obtained under mild conditions (i.e. atmospheric pressure and 40°C). Blank experiments showed no measurable maleic acid conversion (i.e. only ∼0.5% conversion of initial maleic acid), indicating that a significant oxidation reaction of maleic acid is enhanced by the presence of a catalyst. Copper on micelle templated silica-3-aminopropyltrimethoxysilane catalyst therefore was found to be suitable for aqueous phase oxidation of maleic acid with 100% of maleic acid conversion.

Iron catalyst supported on modified kaolin for catalytic wet peroxide oxidation

Clay Minerals ◽  
2019 ◽  
Vol 54 (1) ◽  
pp. 67-73 ◽  
Author(s):  
Ali Boukhemkhem ◽  
Kamel Rida ◽  
Alejandro H. Pizarro ◽  
Carmen B. Molina ◽  
Juan J. Rodriguez
Keyword(s):  
Iron Catalyst ◽  
Batch Reactor ◽  
Textural Properties ◽  
Catalytic Efficiency ◽  
Peroxide Oxidation ◽  
Temperature Range ◽  
Catalytic Support ◽  
Wet Peroxide Oxidation ◽  
Initial Ph ◽  
Catalytic Wet Peroxide Oxidation

AbstractAn iron catalyst supported on the modified Tamazert kaolin has been prepared and tested in catalytic wet peroxide oxidation using phenol and 4-chlorophenol (4-CP) as target compounds (100 mg/L initial concentration). Kaolin is not usually employed as a catalytic support due to its low developed porous structure, but its textural properties may be improved upon calcination and acid and basic treatment. The catalyst was characterized by N2 adsorption–desorption and chemical analysis by total-reflection X-ray fluorescence spectroscopy. The catalytic tests were carried out in a batch reactor with a stoichiometric amount of H2O2. The catalytic efficiency was studied within the temperature range of 25–55°C at an initial pH of 3.3 and 1 g/L catalyst. Complete phenol and 4-CP removal was achieved with no significant differences in phenol and 4-CP conversions within the temperature range tested. Meanwhile, total organic carbon (TOC) reduction was greatly favoured by increasing the temperature, which may be partially attributed to a probable contribution of a homogeneous reaction associated with iron leaching. However, this effect might be of limited significance because the highest concentrations of iron in the liquid phase were below 4.5 and 8.5 mg/L in the experiments with phenol and 4-CP, respectively. At 55°C, TOC was reduced by ~70% after 4 h reaction time, with the remaining by-products corresponding almost completely to low-molecular-weight carboxylic acids of very low ecotoxicity.

Catalytic wet peroxide oxidation of phenol by [C16H33(CH3)3N]4H2SiV2W10O40 catalyst

RSC Advances ◽  
2014 ◽  
Vol 4 (14) ◽  
pp. 7266-7274 ◽  
Author(s):  
Huacheng Li ◽  
Xia Yu ◽  
Hongwei Zheng ◽  
Yiming Li ◽  
Xiaohong Wang ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Atmospheric Pressure ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Oxidation Of Phenol ◽  
Catalytic Wet Peroxide Oxidation

Under ambient temperature and atmospheric pressure conditions, phenol could be completely oxidized to CO2 with catalyst [C16H33(CH3)3N]4H2SiV2W10O40.

scholarly journals Treatment of methyl orange by the catalytic wet peroxide oxidation process in batch and continuous fixed bed reactors using Fe-impregnated 13X as catalyst

2018 ◽  
Vol 78 (4) ◽  
pp. 936-946 ◽  
Author(s):  
Jian Liu ◽  
Gang Peng ◽  
Xia Jing ◽  
Zhengji Yi
Keyword(s):  
Methyl Orange ◽  
Flow Rate ◽  
Batch Reactor ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Feed Flow Rate ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Fixed Bed Reactors ◽  
Catalytic Wet Peroxide Oxidation

Abstract Fe-impregnated 13X (Fe-13X) catalysts were prepared for catalytic wet peroxide oxidation (CWPO) of methyl orange (MO) solution in batch and continuous fixed bed reactors. A systematical study was carried out to investigate the influence of the main operating parameters on the batch reactor performance. The kinetic curves were analyzed by using a pseudo-first-order kinetic equation over the 30–70 °C temperature range. In addition, the effects of catalysts filling amount and feed flow rate on the catalytic performance of Fe-13X catalysts in a fixed bed reactor were studied. The experimental results showed that the Fe-13X catalysts achieved the highest activity (100% MO conversion and 74.5% chemical oxygen demand (COD) elimination ratio, respectively) at 25 min with trace mount of Fe leaching concentration (<2.1 mg/L) at the optimized reaction conditions (namely 1.0 g/L catalyst concentration, pH 2.0, 17.6 mM H2O2, 70 °C) in a batch reactor. Kinetic studies showed that two different reaction regions existed, and an activation energy of 51.9 kJ/mol for the second region was found. Under the optimal operating conditions found (namely, catalysts filling amount of 3.5 g, feed flow rate of 4 mL/min), the Fe-13X catalysts displayed high MO conversion (99.4%) and COD elimination ratio (77.1%) after continuously ran for 200 min in a fixed bed reactor.

scholarly journals Preparation of Al/Fe-PILC clay catalysts from concentrated precursors: enhanced hydrolysis of pillaring metals and intercalation

RSC Advances ◽  
2020 ◽  
Vol 10 (66) ◽  
pp. 40450-40460
Author(s):  
Carlos Andrés Vallejo ◽  
Luis Alejandro Galeano ◽  
Raquel Trujillano ◽  
Miguel Ángel Vicente ◽  
Antonio Gil
Keyword(s):  
Solvent Free ◽  
Peroxide Oxidation ◽  
Highly Active ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation ◽  
Hydrolysis Of ◽  
Clay Catalysts

Significantly intensified preparation of Al/Fe-hydrolysed-pillaring solutions and solvent-free intercalation of bentonites yielding Al/Fe-PILCs highly active in catalytic wet peroxide oxidation.

Surface modification of sewage sludge derived carbonaceous catalyst for m-cresol catalytic wet peroxide oxidation and degradation mechanism

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41867-41876 ◽  
Author(s):  
Yang Yu ◽  
Huangzhao Wei ◽  
Li Yu ◽  
Tong Zhang ◽  
Sen Wang ◽  
...  
Keyword(s):  
Surface Modification ◽  
Sewage Sludge ◽  
Organic Synthesis ◽  
Degradation Mechanism ◽  
Peroxide Oxidation ◽  
Wet Peroxide Oxidation ◽  
Carbonaceous Catalyst ◽  
Catalytic Wet Peroxide Oxidation

Organic synthesis is used to investigate the degradation of m-cresol and the intermediates are identified by in situ NMR.

Sign in / Sign up

Export Citation Format

Share Document