Kinetics and mechanism study on catalytic oxidation of chlorobenzene over V2O5/TiO2 catalysts

Wang, Jian; Wang, Xue; Liu, Xiaolong; Zeng, Junlin; Guo, Yangyang; Zhu, Tong

doi:10.1016/j.molcata.2015.03.003

Cited by 96 publications

(35 citation statements)

References 46 publications

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“…It is known that the first steps of both deNO x via NH 3 -SCR reaction and chlorinated aromatic compounds decomposition over V 2 O 5 /TiO 2 catalyst are the chemisorption of the reactants onto the catalyst through polyvanadic acid species (Roy et al, 2009;Wang et al, 2015). Meanwhile, the catalyst is participated in the two reactions and converts between V 5þ O x and V 4þ O x (Roy et al, 2009;Delaigle et al, 2009).…”

Section: Effect Of No and Nh 3 Addition On Pcdd/fs Removalmentioning

confidence: 99%

Catalytic decomposition of gaseous PCDD/Fs over V2O5/TiO2-CNTs catalyst: Effect of NO and NH3 addition

Wang

Hung

et al. 2016

Chemosphere

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Section: Effect Of No and Nh 3 Addition On Pcdd/fs Removalmentioning

confidence: 99%

Catalytic decomposition of gaseous PCDD/Fs over V2O5/TiO2-CNTs catalyst: Effect of NO and NH3 addition

Wang

Hung

et al. 2016

Chemosphere

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“…Note that chlorinated benzenes have been reported to adsorb to the catalysts through nucleophilic substitution involving the chlorine atom, which is a relatively slow process [26,27] and one that is not explored further in this study. Treatment of AC with nitrogen-containing molecules such as ammonia could introduce nitrogen functionalities, and pyridine is the most important such species.…”

Section: By-product Analysis and Catalytic Mechanismmentioning

confidence: 99%

“…The samples were then held at 900 °C for 3 h. Here, the thermal treatment of samples are referred to as AC-NH3, AC-CO2, and AC-N2 following modification by NH3, CO2, and N2, respectively. Note that chlorinated benzenes have been reported to adsorb to the catalysts through nucleophilic substitution involving the chlorine atom, which is a relatively slow process [26,27] and one that is not explored further in this study.…”

Section: Chemical Treatmentmentioning

confidence: 99%

Catalytic Degradation of Ortho-Chlorophenol Using Activated Carbon Modified by Different Methods

et al. 2018

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Abstract:The performance of activated carbon (AC) modified by different methods was compared for its catalytic degradation of ortho-chlorophenol (o-CP). For the chemically treated AC, the catalytic effect of AC-NH 3 ·H 2 O was superior to the other catalysts examined, having an o-CP removal efficiency of 82.2% at 330 • C. For the metal-modified catalysts, AC-V and AC-Co showed similar removal performances of 93.2% at 330 • C. N 2 adsorption-desorption isotherms, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and gas chromatography-mass spectrometry (GC-MS) analyses were used to characterize the reaction products, and different reaction mechanisms were proposed for both AC-NH 3 ·H 2 O and AC-V according to the results. Complete oxidative degradation of o-CP was achieved by AC-V, with AC-NH 3 ·H 2 O leading to the formation of additional dioxins. It can be deduced that a risk of dioxin synthesis and escape during the regeneration process is possible when nitrogen-modified carbon is used in selective catalytic reduction (SCR) denitrification reactions, especially in the presence of chlorine atoms, benzene rings, and oxygen.

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“…The catalytic behavior is associated with the interaction between the catalyst and the reactant, thus, understanding the relationship between adsorption/desorption and combustion of CVOCs over the catalysts becomes very important. The information can not only explain their own catalytic characteristics, but also provide insights into catalytic macroscopic behaviors [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Study of Catalytic Combustion of Chlorobenzene and Temperature Programmed Reactions over CrCeOx/AlFe Pillared Clay Catalysts

Qiu

Situ

et al. 2019

Materials

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In this study, both AlFe composite pillaring agents and AlFe pillared clays (AlFe-PILC) were synthesized via a facile process developed by our group, after which mixed Cr and Ce precursors were impregnated on AlFe-PILC. Catalytic combustion of organic pollutant chlorobenzene (CB) on CrCe/AlFe-PILC catalysts were systematically studied. AlFe-PILC displayed very high thermal stability and large BET surface area (SBET). After 4 h of calcination at 550 °C, the basal spacing (d001) and SBET of AlFe-PILC was still maintained at 1.91 nm and 318 m2/g, respectively. Large SBET and d001-value, along with the strong interaction between the carrier and active components, improved the adsorption/desorption of CB and O2. When the desorption temperatures of CB and O2 got closer to the CB combustion temperature, the CB conversion could be increased to a higher level. CB combustion on CrCe/AlFe-PILC catalyst was determined using a Langmuir–Hinshelwood mechanism. Adsorption/desorption/oxidation properties were critical to design highly efficient catalysts for CB degradation. Besides, CrCe/AlFe-PILC also displayed good durability for CB combustion, whether in a humid environment or in the presence of volatile organic compound (VOC), making the catalyst an excellent material for eliminating chlorinated VOCs.

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Kinetics and mechanism study on catalytic oxidation of chlorobenzene over V2O5/TiO2 catalysts

Cited by 96 publications

References 46 publications

Catalytic decomposition of gaseous PCDD/Fs over V2O5/TiO2-CNTs catalyst: Effect of NO and NH3 addition

Catalytic decomposition of gaseous PCDD/Fs over V2O5/TiO2-CNTs catalyst: Effect of NO and NH3 addition

Catalytic Degradation of Ortho-Chlorophenol Using Activated Carbon Modified by Different Methods

Study of Catalytic Combustion of Chlorobenzene and Temperature Programmed Reactions over CrCeOx/AlFe Pillared Clay Catalysts

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