Preparation, characterization and kinetic behavior of supported copper oxide catalysts on almond shell-based activated carbon for oxidation of toluene in air

Zabihi, Mohammad; Shayegan, Jalal; Fahimirad, Mahdi; Khorasheh, Farhad

doi:10.1007/s10934-014-9877-5

Cited by 22 publications

(11 citation statements)

References 75 publications

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“…Fig.17a indicates that addition of lanthanum and copper oxides to the alumina support reduces the catalyst activity for complete oxidation of toluene despite the surface modification caused by simultaneous addition of lanthanum and copper. Activity of copper oxide for total oxidation of toluene is higher than other metal oxides as reported in the literature [4]. Compared with other La-Cu/AlSE bimetallic catalysts, therefore, La2-Cu6/AlSE had the highest activity for oxidation of toluene in the humid air.…”

Section: Characterization Of Bimetallic Catalystsmentioning

confidence: 57%

“…Studies reported in the open literature suggest the negative effect of feed humidity on the catalyst activity. Water vapor is an end product in the oxidation of VOCs and could also be present in a humid feed [4]. It has been reported that the conversion of toluene decreased with increasing relative humidity in the feed due to the competition between water vapor, carbon dioxide, and toluene for adsorption on the metal oxides [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Oxidation of toluene in humid air by metal oxides supported on γ-alumina

Esmaeilirad

Zabihi

Shayegan

et al. 2017

Journal of Hazardous Materials

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Monometallic and bimetallic supported metal oxides catalysts on γ-alumina were prepared by heterogeneous deposition-precipitation. The γ-alumina used as a support was synthesized by the sol-gel and the co-precipitation methods. Supports and catalysts were characterized by Brunauer-Emmett-Teller (BET) surface area, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The performance of the prepared catalysts was studied for total oxidation of toluene in air at different relative humidity and oxidation temperatures. Efficiency of bimetallic catalysts for deep oxidation of toluene was higher than copper oxide supported on γ-alumina. Although increasing the lanthanum, cobalt, and nickel loading on the support led to a modified catalyst surface and morphology, the catalytic activity of bimetallic catalysts decreased with increasing lanthanum, cobalt, and nickel content due to the reduced amount of copper oxide which has a higher activity for oxidation of volatile organic compounds. The γ-alumina prepared by the sol-gel method using ethanol as a solvent (AlSE) was the best support and La-Cu/AlSE had the best performance (toluene removal efficiency >90%). In addition, the presence of water vapor in the feed had a negative effect on toluene conversion.

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Section: Characterization Of Bimetallic Catalystsmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Oxidation of toluene in humid air by metal oxides supported on γ-alumina

Esmaeilirad

Zabihi

Shayegan

et al. 2017

Journal of Hazardous Materials

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“…Thus, there is a need to develop economically viable techniques to effectively remove these pollutants. Catalytic oxidation is recognized as one of the most effective methods to reduce the atmospheric concentrations of VOCs [29][30][31]. Among the various approaches, catalytic oxidation is the most promising for this purpose due to advantages, which include high efficiency, low operating temperature, and no secondary pollution.…”

Section: Catalytic Oxidation Of Volatile Organic Compoundsmentioning

confidence: 99%

Degradation of Volatile Organic Compounds with Catalysts-Containing Zeolite and Ordered Mesoporous Silica

Schwanke¹,

Balzer²,

Pergher³

2017

Handbook of Ecomaterials

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This chapter will show the general concepts of catalytic systems applied to reduction of atmospheric pollutants. The catalytic oxidation of volatile organic compounds (VOCs) is considered the most efficient strategy for the degradation to CO 2 and H 2 O using low energy costs without creating further toxic byproducts. The used catalysts are noble or transition metals, which are supported on matrices with high surface area, which play a key role to decrease the amount of expensive noble metals and contribute to the performance of the catalytic system. Zeolites and ordered mesoporous silica materials are a class of porous materials extensively used as catalysts and supports due to their unique properties such as high surface area, well-defined pores, and morphological control. Here, the general approaches about catalytic oxidation of VOCs combined with zeolite and ordered mesoporous silica as supports are discussed.

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“…The performance of the catalyst toward the oxidation of VOCs depends on the physicochemical properties and morphology of the catalysts, the operating conditions, and the type and composition of the inlet gas stream [67][68][69]. Esmaeilirad et al, [70] have suggested that humidity could negatively affect the catalyst activity and the decomposition of the VOCs.…”

Section: Introductionmentioning

confidence: 99%

Moderate Temperature Treatment of Gas-Phase Volatile Organic Toluene Using NiO and NiO–TiO2 Nano-catalysts: Characterization and Kinetic Behaviors

Almomani

Bhosale

Khraisheh

2020

Waste Biomass Valor

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For the first time, the potential of Ni/NiO and NiO–TiO2 nano-catalysts for the oxidation of toluene under moderate temperatures was investigated. The nano-catalysts were prepared using the solution combustion synthesis method (SCSM) and the effect of the composition of nano-catalysts, the inlet toluene concentration $$([\text{C}_{7} {\text{H}}_{8}]_{in})$$ ( [ C 7 H 8 ] in ) , the relative humidity (RH), and the temperature on the percentage of toluene conversion ($$\% {\text{TN}}_{Conv.} )$$ % TN C o n v . ) were subsequently examined. Results revealed that the nano-catalysts synthesized with a low fuel-to-metal ratio produced pure NiO, which has significant catalytic activity toward the conversion of toluene. Conversely, the high fuel-to-metal ratio generated a nano-catalysts that contains a mixture of Ni/NiO or pure Ni with low activity toward the conversion of toluene. Adding NiO to TiO2 increased the surface area of the catalyst, augmented the catalyst active sites, enhanced the oxidation of toluene, and increased CO2 selectivity ($${\text{S}}_{{{\text{CO}}_{2} }}$$ S CO 2 ). NiO and NiO–TiO2 nano-catalysts exhibited higher reaction rates, significant catalyst turnover frequency, and low activation energy. The obtained results revealed that the SCSM is a promising synthesis method for producing NiO or NiO–TiO2 nano-catalysts, which can be employed successfully for the removal of toluene from gas streams. Graphic Abstract

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Preparation, characterization and kinetic behavior of supported copper oxide catalysts on almond shell-based activated carbon for oxidation of toluene in air

Cited by 22 publications

References 75 publications

Oxidation of toluene in humid air by metal oxides supported on γ-alumina

Oxidation of toluene in humid air by metal oxides supported on γ-alumina

Degradation of Volatile Organic Compounds with Catalysts-Containing Zeolite and Ordered Mesoporous Silica

Moderate Temperature Treatment of Gas-Phase Volatile Organic Toluene Using NiO and NiO–TiO2 Nano-catalysts: Characterization and Kinetic Behaviors

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