Recent Advances in Cobalt and Related Catalysts: From Catalyst Preparation to Catalytic Performance

Vakros, John

doi:10.3390/catal11040420

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Over the years, attempts have been made to develop a safer and greener synthesis route for TPA, including the elimination of purification steps via a new spray concept (Li et al, 2013), development and use of new types of homogeneous catalysts involving bromide salts of manganese, cobalt and copper (Holiday et al, 1998;Pérez et al, 2011), N-hydroxyimide (Falcon et al, 2010), heterogeneous cobalt-based catalysts (Xu et al, 2020;Vakros, 2021) and application of high-temperature liquid water to replace AcOH solvent (Dunn & Savage, 2002;Fraga-Dubreuil & Poliakoff, 2006).…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Conditions on Catalytic Hydrothermal Oxidation of p-Xylene to Terephthalic Acid

Yeop¹,

Ismail²,

Daud³

2022

JST

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This study investigates the influence of hydrothermal process conditions on the yield of terephthalic acid (TPA). Deionised water was employed as a green reaction medium substitute for acetic acid solvent widely used in the Amoco oxidation process for TPA production. Utilising the unique properties of water at elevated temperature and pressure, TPA was synthesised from p-xylene under subcritical (250 °C, 300 °C and 350 °C) and supercritical (400 °C) water conditions in a 10 mL micro-bomb batch reactor. Process conditions, including hydrogen peroxide (H2O2) oxidant concentrations, manganese bromide (MnBr2) catalyst and water loadings, were varied at a fixed reaction time of 60 minutes. The p-xylene conversion and TPA yield were determined using high-performance liquid chromatography (HPLC). In addition, the presence of chemical functional groups and chemical compositions of the reaction products were examined using Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometer (GC-MS), respectively. It was found that an optimum TPA yield of 94.56% was observed at 350°C with hydrogen peroxide, deionised water and manganese bromide catalyst set at 1.5 mL, 2.5 mL, and 2 mL, respectively. Other major reaction products identified were p-tolualdehyde and 1,4-hydroxymethyl benzaldehyde.

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Section: Introductionmentioning

confidence: 99%

Effect of Process Conditions on Catalytic Hydrothermal Oxidation of p-Xylene to Terephthalic Acid

Yeop¹,

Ismail²,

Daud³

2022

JST

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Catalytic conversion of biomass and plastic waste to alternative aviation fuels: A review

Aghamiri,

Lahijani

2024

Biomass and Bioenergy

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Recent Advances in Cobalt and Related Catalysts: From Catalyst Preparation to Catalytic Performance

Abstract: In our days cobalt, Co, and related catalysts are very attractive because they exhibit a lot of advantages like low cost and high activity in a significant variety of different applications[...]

Cited by 2 publications

References 6 publications

Effect of Process Conditions on Catalytic Hydrothermal Oxidation of p-Xylene to Terephthalic Acid

Effect of Process Conditions on Catalytic Hydrothermal Oxidation of p-Xylene to Terephthalic Acid

Catalytic conversion of biomass and plastic waste to alternative aviation fuels: A review

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