Journal ArticleDOI
Activity and stability of iron-containing pillared clay catalysts for wet air oxidation of phenol
Jing Guo,Muthanna H. Al-Dahhan +1 more
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In this article, the effects of temperature, air pressure, initial phenol concentration, catalyst loading, and catalyst size on the conversion of total organic carbon were investigated in a stirred tank and packed bed reactor.Abstract:
Catalytic wet air oxidation of an aqueous phenol solution over Fe–Al pillared catalyst was conducted in a stirred tank and packed bed reactor. Semi-batch experiments in the stirred tank reactor were designed to investigate the effects of temperature, air pressure, initial phenol concentration, catalyst loading, and catalyst size on the conversion of total organic carbon. The catalyst exhibited an important activity in degrading total organic carbon at mild conditions. Its internal mass transfer resistance was assessed over different catalyst sizes via a chosen criterion. Packed bed runs were conducted under selected temperature and pressure (170 °C, 3.2 MPa) over a long duration (240 h). Various characterization methods were employed for fresh and aged pillared clay catalysts. Occurrence of catalyst deactivation by carbonaceous deposits during the packed bed operation was observed through scanning electron microscopy (SEM) and elemental analysis. Insignificant metal leaching was observed because trace amounts of metal elements were detected in the hot acidic liquid solution.read more
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Fenton-like degradation of 2,4-dichlorophenol using Fe3O4 magnetic nanoparticles
Lejin Xu,Jianlong Wang +1 more
TL;DR: In this paper, the effect of different reaction parameters such as initial pH, H2O2 dosage, Fe3O4 nanoparticles addition, initial concentration of 2,4-DCP and temperature on two-stage first-order kinetics of degradation was studied.
Journal ArticleDOI
Catalysis by layered materials: A review
TL;DR: In this paper, the use of layered materials (layered perovskite, anionic clays, pillared clays) in catalytic reactions is reviewed with emphasis on the possibilities offered from these catalysts to develop new processes for environmental protection, selective oxidation and refinery/biorefinery.
Journal ArticleDOI
Heterogeneous catalytic treatment of synthetic dyes in aqueous media using Fenton and photo-assisted Fenton process
Ai Ni Soon,B.H. Hameed +1 more
TL;DR: In this paper, a review of the heterogeneous catalytic Fenton processes for synthetic dye abatement in wastewater for the past five years, though some earlier researches which were fruitful in the field will also discussed.
Journal ArticleDOI
Degradation of sulfamethazine using Fe3O4-Mn3O4/reduced graphene oxide hybrid as Fenton-like catalyst.
Zhong Wan,Jianlong Wang +1 more
TL;DR: Fe3O4-Mn 3O4/reduced graphene oxide (RGO) hybrid catalyst was synthesized through polyol process and impregnation method and used as heterogeneous Fenton-like catalyst for degradation of sulfamethazine (SMT) in aqueous solution.
Journal ArticleDOI
Fenton-like oxidation of Orange II solutions using heterogeneous catalysts based on saponite clay
J. Herney Ramirez,Carlos A. V. Costa,Luis M. Madeira,G. Mata,Miguel Vicente,M.L. Rojas-Cervantes,Antonio J. López-Peinado,Rosa M. Martín-Aranda +7 more
TL;DR: In this article, the degradation and mineralization of Orange II solutions using catalysts based on pillared saponite impregnated with several iron salts is reported, achieving 99% of dye degradation with 91% of total organic carbon (TOC) reduction (at 70°C) using only ca. 90mg of clay catalyst per litre of solution.
References
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Book
Chemical Reactor Analysis and Design
TL;DR: The fundamental Mass, Energy, and Momentum Balance Equations The Batch and Semibatch Reactors The Plug Flow Reactor The perfectly mixed flow Reactor Fixed Bed Catalytic Reactors Nonideal Flow Patterns and Population Balance Models Fluidized Bed and Transport Reactors Multiphase Flow Reactors Author Index Subject Index as mentioned in this paper
Book
Particle Size Measurement
TL;DR: In this paper, the authors proposed a method of particle size distribution determination based on the Coulter principle, which is the alternative derivation of Kozeny's equation using equivalent capillaries.
Journal ArticleDOI
Catalytic Abatement of Water Pollutants
TL;DR: In this article, a review of solid-catalyzed oxidation and reduction processes for the treatment of wastewater that contains small concentrations of toxic compounds and for which separation is not economical while biological treatment is not feasible.