Catalytic hydrodechlorination of chlorobenzene over supported palladium catalyst in buffered medium

Nangoi, Inna M.; Kiyohara, Pedro Kunihiko; Rossi, Liane M.

doi:10.1016/j.apcatb.2010.07.008

Cited by 15 publications

(10 citation statements)

References 43 publications

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“…Pd nanocatalysts have been used in the hydrodechlorination and oxidation of chlorobenzene and chlorinated VOCs. [21][22][23][24][25][26][27][28][29][30] The catalytic properties of Pd particles combined with ZnO would improve the sensitivity and sensing selectivity toward chlorobenzene; however, the aggregation and growth of Pd particles need to be controlled. The dispersion and stability of Pd loaded on or doped in ZnO are important for improved gas-sensing performance.…”

Section: Introductionmentioning

confidence: 99%

Well-dispersed Pd nanoparticles on porous ZnO nanoplates via surface ion exchange for chlorobenzene-selective sensor

Feng

Gao

et al. 2019

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Well-dispersed Pd nanoparticles on porous ZnO nanoplates via surface ion exchange for chlorobenzene-selective sensor

Feng

Gao

et al. 2019

RSC Adv.

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“…In a typical HDC procedure, 10 mL of buffer solution was spiked with 100 ppm chlorobenzenes, and 50 mg of supported Pt catalyst RHA-Pt, or 50 mg of RHA-Ti was added [2]. The mixture was magnetically stirred at 100 rpm with a stirring bar and after the desired time (2 h, 16 h, 24 h), the samples reaction mixtures were collected, and separated by 1.5 mL heptane for 5 min.…”

Section: Catalytic Hydrodechlorination (Hdc) By Conventionalmentioning

confidence: 99%

“…For example, COCs are used as anesthetics, pesticides and herbicides, fungicides, dyes, pharmaceuticals, plant growth regulators, heat-transfer medium, and industrial solvents and are byproducts of several industries (e.g., oil refining, paper industry, plastics or adhesives manufacturing, etc.) [1][2][3][4][5][6]. The importance of these chlorinated chemicals lies in the fact that chlorine bonds strongly to other elements, and this makes chlorine an important ingredient and precursor in building new compounds.…”

Section: Introductionmentioning

confidence: 99%

“…For example, palladium, ruthenium, rhodium, iridium, rhenium, titanium, platinum, and Raney nickel [2, 28-30] were used as catalysts. Where alumina, activated carbon [2], Ni-Mo/ C [5], and silica are among the catalyst supports for the most commonly used ones in the HDC reactions, the catalytic activity of HDC does not only depend on the size of the metals but also on the nature of the support and the preparation method of the support [31]. Rice husk (RH) is an agricultural waste and the ash contains about 92-95% silica (SiO 2 ).…”

Section: Introductionmentioning

confidence: 99%

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Rice Husk Supported Catalysts for Degradation of Chlorobenzenes in Capillary Microreactor

Thabet

Basheer

Maung

et al. 2015

Journal of Nanomaterials

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Chlorinated organic pollutants are persistent, toxic, and ubiquitously distributed environmental contaminants. These compounds are highly bioaccumulative and adversely affect the ozone layer in the atmosphere. As such, their widespread usage is a major cause of environmental and health concern. Therefore, it is important to detoxify such compounds by environment friendly methods. In this work, rice husk supported platinum (RHA-Pt) and titanium (RHA-Ti) catalysts were used, for the first time, to investigate the detoxification of chlorobenzenes in a glass capillary microreactor. High potential (in kV range) was applied to a reaction mixture containing buffer solution in the presence of catalyst. Due to high potential, hydroxyl and hydrogen radicals were produced, and the reaction was monitored by gas chromatography-mass spectrometry. The main advantage of this capillary reactor is the in situ generation of hydrogen for the detoxification of chlorobenzene. Various experimental conditions influencing detoxification were optimized. Reaction performance of capillary microreactor was compared with conventional catalysis. Only 20 min is sufficient to completely detoxify chlorobenzene in capillary microreactor compared to 24 h reaction time in conventional catalytic method. The capillary microreactor is simple, easy to use, and suitable for the detoxification of a wide range of chlorinated organic pollutants.

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“…HDC reaction of chlorobenzene was satisfactory with > 99% conversion in NaOH/water or alcohols and Et 3 N/water or buffered medium. 82 In order to better understand the influence of the ligands grafted on the support surfaces, our group performed an experiment in which pre-formed Pd NPs were deposited on silica supports functionalized with amine and ethylenediamine groups (unpublished results). A great influence on the reaction rates depending on the functional group grafted on the surface of the support was observed, even though the Pd NPs have the same size (prepared in the same batch).…”

Section: Palladium Catalystsmentioning

confidence: 99%

Recent advances in the development of magnetically recoverable metal nanoparticle catalysts

Rossi¹,

Garcia²,

Vono³

2012

J. Braz. Chem. Soc.

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O objetivo deste Account é fornecer uma visão geral de nossas atividades atuais de pesquisa, as quais envolvem a síntese e modificação de nanomateriais superparamagnéticos para aplicação na área de separação magnética e catálise. Primeiramente, uma introdução ao magnetismo e à separação magnética é feita. Em seguida, estratégias sintéticas que têm sido desenvolvidas para gerar nanopartículas superparamagnéticas revestidas esfericamente por sílica e outros óxidos, com destaque a sistemas bem caracterizados e preparados por metodologias que geram amostras de elevada qualidade e que, a princípio, podem ser produzidas em maior escala, são discutidas. Uma série de catalisadores magneticamente recuperáveis preparados em nosso grupo de pesquisa pela combinação única de suportes superparamagnéticos e nanopartículas metálicas é destacada. Este Account é concluído com observações pessoais e perspectivas neste campo de pesquisa.The aim of this Account is to provide an overview of our current research activities on the design and modification of superparamagnetic nanomaterials for application in the field of magnetic separation and catalysis. First, an introduction of magnetism and magnetic separation is done. Then, the synthetic strategies that have been developed for generating superparamagnetic nanoparticles spherically coated by silica and other oxides, with a focus on well characterized systems prepared by methods that generate samples of high quality and easy to scale-up, are discussed. A set of magnetically recoverable catalysts prepared in our research group by the unique combination of superparamagnetic supports and metal nanoparticles is highlighted. This Account is concluded with personal remarks and perspectives on this research field.

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Catalytic hydrodechlorination of chlorobenzene over supported palladium catalyst in buffered medium

Cited by 15 publications

References 43 publications

Well-dispersed Pd nanoparticles on porous ZnO nanoplates via surface ion exchange for chlorobenzene-selective sensor

Well-dispersed Pd nanoparticles on porous ZnO nanoplates via surface ion exchange for chlorobenzene-selective sensor

Rice Husk Supported Catalysts for Degradation of Chlorobenzenes in Capillary Microreactor

Recent advances in the development of magnetically recoverable metal nanoparticle catalysts

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