Catalytic removal of trichloroethylene from water over palladium loaded microporous and hierarchical zeolites

Śrębowata, Anna; Tarach, Karolina A.; Girman, Vladimír; Góra‐Marek, Kinga

doi:10.1016/j.apcatb.2015.08.025

Cited by 41 publications

(29 citation statements)

References 60 publications

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“…The deposits containing chlorine (m/z 36, HCl liberation) were not observed during the aqueousphase hydrodechlorination. Our results are in agreement with earlier data concerning similar results obtained for Ni/C ST-A and Ni-Pd/C catalysts after the aqueous phase reaction with TCE [31].…”

Section: Tph Resultssupporting

confidence: 83%

“…Zhou et al [29] postulated the volcano type of the relationship between the hydrodechlorination activity and metal particles size. On the other hand, recently published results of the aqueous phase hydrodechlorination of chloroorganic compounds indicate the beneficial role of the small metal particles on overall activity of the metallic catalysts [26,30,31]. Our results showed that the aqueous phase hydrodechlorination of 1,1,2-trichloroethene is structurally sensitive, and large nickel particles (*30 nm) are the most active for this reaction under the studied conditions.…”

Section: Catalytic Activitymentioning

confidence: 50%

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Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

Kowalewski

Kamińska

Słowik

et al. 2017

Reac Kinet Mech Cat

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Active carbon supported nickel catalysts prepared with nickel(II) nitrate and nickel(II) chloride precursors after reduction at 673 or 1173 K were investigated in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene (TCE). These nickel catalysts facilitate the purification of water via decomposing TCE, but their catalytic properties depend on the chemistry of the nickel precursor used for Ni/C synthesis and pretreatment conditions. The chemistry of precursor catalysts affects the particle size, which in turn is correlated with catalytic activity. We observed the highest activity for Ni/C with the largest nickel particles. The application of high temperature reduction of nickel precursors increases the activity and minimizes the differences between the catalytic properties of the samples prepared from different salts.

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Section: Tph Resultssupporting

confidence: 83%

Section: Catalytic Activitymentioning

confidence: 50%

Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

Kowalewski

Kamińska

Słowik

et al. 2017

Reac Kinet Mech Cat

Self Cite

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“…Pd-Containing hierarchical ZSM-5 zeolites have been explored in hydrodechlorination of trichloroethylene in the aqueous phase, showing enhanced catalytic performance compared to the use of a pure microporous zeolite sample. 327 Hierarchical ZSM-5 zeolites, containing iron, have been tested in H 2 O 2 decomposition reactions in the absence and presence of an iron-complexing agent, as well as in oxidation of low and high molecular weight organic compounds by H 2 O 2 , noting that the presence of secondary porosity in the zeolite resulted in a significant improvement of the catalyst properties. 328…”

Section: Industrial Processesmentioning

confidence: 99%

From 3D to 2D zeolite catalytic materials

et al. 2018

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Research activities and recent developments in the area of three-dimensional zeolites and their two-dimensional analogues are reviewed. Zeolites are the most important industrial heterogeneous catalysts with numerous applications. However, they suffer from limited pore sizes not allowing penetration of sterically demanding molecules to their channel systems and to active sites. We briefly highlight here the synthesis, properties and catalytic potential of three-dimensional zeolites followed by a discussion of hierarchical zeolites combining micro- and mesoporosity. The final part is devoted to two-dimensional analogues developed recently. Novel bottom-up and top-down synthetic approaches for two-dimensional zeolites, their properties, and catalytic performances are thoroughly discussed in this review.

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“…As the NPs are isolated from others NPs due to their encapsulation on the zeolite cages and different channels, the catalytic activity can be improved, as well as the stability [20]. Due to this, zeolites are commonly used in liquid phase hydrodechlorination reactions [13,21,22], however, fewer studies have been applied to gas phase HDC [23][24][25][26]. In those gas-phase studies, conversion usually decreased after a few hours on stream, high selectivities to methane were obtained, and/or very low reactant inlet concentrations (below 100 ppm) were used [23,27,28].…”

mentioning

confidence: 99%

Promoting Light Hydrocarbons Yield by Catalytic Hydrodechlorination of Residual Chloromethanes Using Palladium Supported on Zeolite Catalysts

et al. 2020

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Gas catalytic hydrodechlorination (HDC) of trichloromethane (TCM) and dichloromethane (DCM) was analyzed using Pd (1 wt.%) on different zeolites as catalysts. The aim of this study was to know the surface properties of the catalysts and reaction conditions that promote the yield to light hydrocarbons in this reaction. Five different zeolite supports were used from three commercial zeolites (KL, L-type; NaY, Faujasite; H-MOR, Mordenite). KL and NaY were submitted to ionic exchange treatments in order to increase their acidity and analyze the effect of the acidity in the activity and selectivity of the HDC reaction. Exchanged zeolites (HL and HY) showed the highest Pd dispersion due to their higher surface acidity. The best TCM/DCM conversion and selectivity to light hydrocarbons was obtained using the two non-exchanged zeolite-catalysts, KL and NaY. Low surface acidity seems to be the key aspect to promote the formation of light hydrocarbons. The formation of these products is favored at high reaction temperatures and low H2: chloromethane ratios. KL showed the highest selectivity to olefins (60%), although with a lower dechlorination degree. Non-exchanged NaY catalyst showed high selectivity to paraffins (70% and 95% for the HDC of DCM and TCM, respectively).

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Catalytic removal of trichloroethylene from water over palladium loaded microporous and hierarchical zeolites

Cited by 41 publications

References 60 publications

Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

Effect of metal precursor and pretreatment conditions on the catalytic activity of Ni/C in the aqueous phase hydrodechlorination of 1,1,2-trichloroethene

From 3D to 2D zeolite catalytic materials

Promoting Light Hydrocarbons Yield by Catalytic Hydrodechlorination of Residual Chloromethanes Using Palladium Supported on Zeolite Catalysts

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