Journal ArticleDOI
Catalytic wet oxidation: an environmental solution for organic pollutant removal from paper and pulp industrial waste liquor
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TLDR
In this article, the removal of organics from paper and pulp industrial waste was investigated employing wet oxidation and catalytic wet oxidation (CWO) techniques using a high-pressure reaction system.Abstract:
The removal of organics from paper and pulp industrial waste was investigated employing wet oxidation (WO) and catalytic wet oxidation (CWO) techniques using a high-pressure reaction system. Different types of catalysts prepared from single metals (transition/noble) and mixed metals (transition–transition/transition/noble metal) were used in the CWO studies. The paper and pulp liquor treatments were conducted in selected different environments such as (i) liquors with different organic concentrations, (ii) liquors with different pH (11–14), (iii) a range of reaction temperatures (413–463 K), (iv) different catalysts (Cu, Mn, Pd, Cu/Mn, Mn/Pd, Cu/Pd), (v) catalyst loading (1–8 g). The single transition (Cu, Mn) or noble metal (Pd) catalysts showed appreciable total organic removal, but the bi-metal catalysts (Cu/Mn, Cu/Pd, Mn/Pd ) exhibited even higher activity for organics removal. Much higher total organic carbon (TOC) removal (>84%) was achieved by using the CWO process. The TOC removed by the Cu/Pd catalyst was the highest, followed by the Mn/Pd and Cu/Mn catalytic system.read more
Citations
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Journal ArticleDOI
Wet Oxidation and Catalytic Wet Oxidation
TL;DR: In this paper, the authors explored three major aspects of the wet oxidation and catalytic wet oxidation (WO) processes, with the major focus being on WO and CWO, using air or oxygen as an oxidant.
Journal ArticleDOI
Catalytic wet-air oxidation processes: A review
Janez Levec,Albin Pintar +1 more
TL;DR: In this article, a review of the developments in the field of catalytic wet-air oxidation (CWAO) is presented, and the potential of the CWAO process to ultimately destroy organic pollutants in industrial effluents and detoxify them by using novel titania-supported Ru catalysts.
Journal ArticleDOI
Review on recent developments on pulp and paper mill wastewater treatment
TL;DR: Adopting the integrated methods, alongside a combination of biological and physicochemical treatment methods, can be environmentally and economically preferable to minimize environmental contaminants and energy recycling.
Journal ArticleDOI
Copper‐ and Vanadium‐Catalyzed Oxidative Cleavage of Lignin using Dioxygen
Jakob Mottweiler,Marta Puche,Christoph Räuber,Thomas Schmidt,Patricia Concepción,Avelino Corma,Carsten Bolm +6 more
TL;DR: Transition-metal-containing hydrotalcites and V(acac)3 /Cu(NO3 )2 ⋅3 H2 O (acac=acetylacetonate) mixtures were tested for their catalytic activity in the cleavage of the lignin model compound and displayed high activity and good selectivity and afforded veratric acid as the main product.
Journal ArticleDOI
Catalytic Wet Air Oxidation: Are Monolithic Catalysts and Reactors Feasible?
TL;DR: In this article, the literature data on heterogeneous catalysts for catalytic wet air oxidation (CWAO) is provided, and a survey of investigations on process mechanism and kinetics of the CWAO is presented.
References
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Journal ArticleDOI
Wet air oxidation
TL;DR: Wet air oxidation (WAO), involving oxidation at high temperature (125-320 C) and pressure (0.5-20 MPa) conditions, is useful for the treatment of hazardous, toxic, and nonbiodegradable waste streams as mentioned in this paper.
Journal ArticleDOI
Catalytic wet oxidation of phenol over PtxAg1−xMnO2/CeO2 catalysts
TL;DR: In this paper, catalytic wet oxidation reactions of aqueous phenol over unpromoted, base and noble-metal promoted MnO2/CeO2 catalysts were carried out under mild conditions (80-130°C, 0.5MPa O2) in a batch slurry reactor.
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Catalytic wet oxidation of p-chlorophenol over supported noble metal catalysts
TL;DR: In this article, the performance of noble metal catalysts was compared with that of traditional manganese catalysts for aqueous p-chlorophenol (p-CP) solution at 453 K and 2.6 MPa in a slurry reactor.
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Catalytic oxidation of phenol in aqueous solutions
TL;DR: In this article, the authors investigated catalysts for the oxidation of phenol in water in a batch autoclave and found that 35% CuO+65% ZnO was the most active catalysts.
Journal ArticleDOI
Application of photocatalytic oxidation treatment to pretreated and raw effluents from the Kraft bleaching process and textile industry
I. Akmehmet Balcıoğlu,I. Arslan +1 more
TL;DR: In this article, the authors investigated the treatment performance of mixed raw, coagulated and biologically pretreated textile and pulp wastewater and effluents from different process stages by enhanced heterogenous photocatalytic oxidation process.