Liquid-phase oxidation of cyclohexane using CoAPO-5 as the catalyst

Lin, Shiow-Shyung; Weng, Hung‐Shan

doi:10.1016/0926-860x(93)80254-n

Cited by 94 publications

(20 citation statements)

References 21 publications

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“…Liu and Weng [9] first reported the use of CoAPO-5 as heterogeneous catalysts for cyclohexane oxidation in acetic acid as solvent. Unfortunately, further investigations [10] revealed that unavoidable leaching of cobalt from the framework with the use of acetic acid contributed to the observed results.…”

Section: Introductionmentioning

confidence: 99%

Characterization of metal-containing molecular sieves and their catalytic properties in the selective oxidation of cyclohexane

Tian

Liu

et al. 2004

Catalysis Today

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Section: Introductionmentioning

confidence: 99%

Characterization of metal-containing molecular sieves and their catalytic properties in the selective oxidation of cyclohexane

Tian

Liu

et al. 2004

Catalysis Today

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“…Online analysis of the sample during the oxidation may help addressing this issue. Previous works have implemented online analysis during hydrocarbon oxidation using different reactors such as stirred reactors 16,17 or autoclaves 18 . These reactors allow the monitoring of the oxidation products in both the liquid and the gas phases at a higher sampling frequency.…”

Section: Discussionmentioning

confidence: 99%

Original Experimental Approach for Assessing Transport Fuel Stability

Bacha¹,

Amara²,

Fortunato³

et al. 2016

JoVE

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The study of fuel oxidation stability is an important issue for the development of future fuels. Diesel and kerosene fuel systems have undergone several technological changes to fulfill environmental and economic requirements. These developments have resulted in increasingly severe operating conditions whose suitability for conventional and alternative fuels needs to be addressed. For example, fatty acid methyl esters (FAMEs) introduced as biodiesel are more prone to oxidation and may lead to deposit formation. Although several methods exist to evaluate fuel stability (induction period, peroxides, acids, and insolubles), no technique allows one to monitor the real-time oxidation mechanism and to measure the formation of oxidation intermediates that may lead to deposit formation. In this article, we developed an advanced oxidation procedure (AOP) based on two existing reactors. This procedure allows the simulation of different oxidation conditions and the monitoring of the oxidation progress by the means of macroscopic parameters, such as total acid number (TAN) and advanced analytical methods like gas chromatography coupled to mass spectrometry (GC-MS) and Fourier Transform Infrared -Attenuated Total Reflection (FTIR-ATR). We successfully applied AOP to gain an in-depth understanding of the oxidation kinetics of a model molecule (methyl oleate) and commercial diesel and biodiesel fuels. These developments represent a key strategy for fuel quality monitoring during logistics and on-board utilization.

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“…The catalytic wet air oxidation of organics is widely acknowledged to proceed via a free-radical chain reaction mechanism Lin et al, 2003;Lin and Weng, 1994;Rivas et al, 1998) and the condition of stationary free radical concentration is usually assumed (Chang et al, 2002; Catalytic wet air oxidation of phenol Weng, 1993). The critical nanocatalyst concentration phenomenon as observed in this work, is one of the characteristics of free radical chain reaction, in which a slight change in nanocatalyst loading (active phase loading and nanocatalyst loading in reactor) induces a noticeable change in the rate of process (Sadana, 1979).…”

Section: Reaction Network Of Phenol Oxidation Over Synthesized Nanocamentioning

confidence: 99%

Catalytic wet air oxidation of phenol over ultrasound-assisted synthesized Ni/CeO2–ZrO2 nanocatalyst used in wastewater treatment

Parvas

Haghighi

Allahyari

2019

Arabian Journal of Chemistry

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Non-noble metal Ni with different loadings was coated on precipitated CeO 2 -ZrO 2 support by the sonochemistry method and examined for catalytic wet air oxidation of phenol. The structure of the nanocatalysts was determined by BET, FESEM, XRD, and FTIR analyses. The results showed non-uniform morphology of the nanocatalyst at lower Ni contents changed to homogenous morphology with spherical nano particles at higher Ni contents. While the size of NiO crystals remained constant with rising Ni content, the crystallinity of NiO significantly increased. If the crystallinity of NiO was 100% in 20% wt Ni/CeO 2 -ZrO 2 , the crystallinity of NiO in 5% wt Ni was found to be 41.13%. The average particle size in Ni(15%)/CeO 2 -ZrO 2 was 77 nm in which 85.71% of particle diameters were less than 100 nm. Catalytic wet air oxidation of phenol with different Ni loadings indicated improvement of phenol destruction at higher amounts of active phase. Removal of phenol increased with increasing catalyst loading from 4 to 9.0 g/l but further increase to 10 g/l declined the catalyst reactivity. ª 2014 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

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Liquid-phase oxidation of cyclohexane using CoAPO-5 as the catalyst

Cited by 94 publications

References 21 publications

Characterization of metal-containing molecular sieves and their catalytic properties in the selective oxidation of cyclohexane

Characterization of metal-containing molecular sieves and their catalytic properties in the selective oxidation of cyclohexane

Original Experimental Approach for Assessing Transport Fuel Stability

Catalytic wet air oxidation of phenol over ultrasound-assisted synthesized Ni/CeO2–ZrO2 nanocatalyst used in wastewater treatment

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