Replacement reaction-based synthesis of supported palladium catalysts with atomic dispersion for catalytic removal of benzene

2018 ◽  
Vol 6 (35) ◽  
pp. 17032-17039 ◽  
Author(s):  
Linlin Xu ◽  
Dong Chen ◽  
Jianglan Qu ◽  
Liyang Wang ◽  
Jiayi Tang ◽  
...  
Keyword(s):  
Palladium Catalysts ◽  
Catalytic Performance ◽  
Replacement Reaction ◽  
Pd Catalysts ◽  
Supported Palladium Catalysts ◽  
Supported Pd Catalysts ◽  
Supported Palladium ◽  
Catalytic Removal ◽  
Oxidation Of Benzene ◽  
Supported Pd

Supported Pd catalysts with atomic dispersion in CuO show high catalytic performance for the oxidation of benzene at mild temperatures.

Aerobic oxidation of cyclohexanones to phenols and aryl ethers over supported Pd catalysts

2015 ◽  
Vol 2 (6) ◽  
pp. 654-660 ◽  
Author(s):  
Zhenzhong Zhang ◽  
Taishin Hashiguchi ◽  
Tamao Ishida ◽  
Akiyuki Hamasaki ◽  
Tetsuo Honma ◽  
...  
Keyword(s):  
Palladium Catalysts ◽  
Aerobic Oxidation ◽  
Pd Catalysts ◽  
Supported Palladium Catalysts ◽  
Supported Pd Catalysts ◽  
Supported Palladium ◽  
Aryl Ethers ◽  
Supported Pd

ZrO2 supported palladium catalysts promoted the aerobic oxidation of cyclohexanones to give phenols and aryl ethers.

scholarly journals Altervalent cation-doped MCM-41 supported palladium catalysts and their catalytic properties

2011 ◽  
Vol 76 (6) ◽  
pp. 923-932 ◽  
Author(s):  
Haihui Jiang ◽  
Ligang Gai ◽  
Yan Tian
Keyword(s):  
Electron Microscopy ◽  
Palladium Catalysts ◽  
Xrd Analysis ◽  
Molar Ratio ◽  
Pd Catalysts ◽  
Transmission Electron ◽  
Supported Pd Catalysts ◽  
Supported Palladium ◽  
Mcm 41 ◽  
Supported Pd

Metal cation-doped MCM-41 (M-MCM-41, M=Al, Ce, Co, V, or Zr) supported Pd catalysts (Pd/M-MCM-41) were prepared by a solution-based reduction method. The catalysts were characterized by Xray diffraction (XRD) analysis, infrared spectroscopy (IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and further evaluated by selective hydrogenation of parachloronitrobenzene (p-CNB) in anhydrous ethanol. The metal cationcontaining Pd catalysts can efficiently enhance the selectivity for parachloroaniline (p-CAN). The highest selectivity of 96.5 % in the molar distribution for p-CNB to p-CAN was acquired over Pd (1.8 wt. %)/VMCM- 41 (Si/V=30, molar ratio) catalyst, and the corresponding turnover frequency (TOF) was 1.24?10-2 mol p-CNB mol-1 Pd s-1. Water molecules adsorbed by the support have important effects on both the catalytic activity of the sample and the selectivity for p-CAN. A water molecule-mediated catalytic hydrogenation is discussed.

scholarly journals Liquid-phase Hydrogenation of Phenol to Cyclohexanone over Supported Palladium Catalysts

2016 ◽  
Vol 11 (3) ◽  
pp. 354 ◽  
Author(s):  
Lihui Fan ◽  
Luyang Zhang ◽  
Yanming Shen ◽  
Dongbin Liu ◽  
Nasarul Wahab ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Palladium Catalysts ◽  
Pd Nanoparticles ◽  
Moderate Amount ◽  
Supported Palladium Catalysts ◽  
Phenol Hydrogenation ◽  
Liquid Phase Hydrogenation ◽  
Supported Palladium ◽  
Phenol Conversion ◽  
Supported Pd

<p>The ZSM-5, g-Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub> and MgO supported Pd-catalysts were prepared for the phenol hydrogenation to cyclohexanone in liquid-phase. The natures of these catalysts were characterized by XRD, N<sub>2</sub> adsorption-desorption analysis, H<sub>2</sub>-TPR, CO<sub>2</sub>-TPD and NH<sub>3</sub>-TPD. The catalytic performance of the supported Pd-catalyst for phenol hydrogenation to cyclohexanone is closely related to nature of the support and the size of Pd nanoparticles. The Pd/MgO catalyst which possesses higher basicity shows higher cyclohexanone selectivity, but lower phenol conversion owing to the lower specific surface area. The Pd/SiO<sub>2</sub> catalyst prepared by precipitation gives higher cyclohexanone selectivity and phenol conversion, due to the moderate amount of Lewis acidic sites, and the smaller size and higher dispersion of Pd nanoparticles on the surface. Under the reaction temperature of 135 <sup>o</sup>C and H<sub>2</sub> pressure of 1 MPa, after reacting for 3.5 h, the phenol conversion of 71.62% and the cyclohexanone selectivity of 90.77% can be obtained over 0.5 wt% Pd/SiO<sub>2</sub> catalyst. Copyright © 2016 BCREC GROUP. All rights reserved</p><p><em>Received: 7<sup>th</sup> March 2016; Revised: 13<sup>rd</sup> May 2016; Accepted: 7<sup>th</sup> June 2016</em></p><p><strong>How to Cite:</strong> Fan, L., Zhang, L., Shen, Y., Liu, D., Wahab, N., Hasan, M.M. (2016). Liquid-phase Hydrogenation of Phenol to Cyclohexanone over Supported Palladium Catalysts. <em>Bulletin of Chemical Reaction Engineering &amp; Catalysis</em>, 11 (3): 354-362 (doi: 10.9767/bcrec.11.3.575.354-362)</p><p><strong>Permalink/DOI</strong>: <a href="http://doi.org/10.9767/bcrec.11.3.575.354-362">http://doi.org/10.9767/bcrec.11.3.575.354-362</a></p>

The influences of preparation methods on the structure and catalytic performance of single-wall carbon nanotubes supported palladium catalysts in nitrocyclohexane hydrogenation

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22863-22868 ◽  
Author(s):  
Sihua Liu ◽  
Fang Hao ◽  
Pingle Liu ◽  
He'an Luo
Keyword(s):  
Carbon Nanotubes ◽  
Palladium Catalysts ◽  
Catalytic Performance ◽  
Single Wall Carbon Nanotubes ◽  
Preparation Methods ◽  
Single Wall Carbon ◽  
Supported Palladium Catalysts ◽  
Supported Palladium

Preparation methods on the structure and catalytic performance of single-wall carbon nanotubes supported palladium catalysts.

Phenol In Situ Hydrogenation with Carbon Nanotube-Supported Pd Catalyst

2014 ◽  
Vol 934 ◽  
pp. 60-64 ◽  
Author(s):  
Ling Niao Kong ◽  
Ya Ru Huang ◽  
Yin Jun Fang
Keyword(s):  
Activated Carbon ◽  
Carbon Nanotube ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Pd Catalyst ◽  
Pd Catalysts ◽  
Metal Precursor ◽  
Supported Pd Catalysts ◽  
Supported Pd

Carbon nanotube (CNT) and activated carbon (AC)-supported Pd catalysts have been prepared by impregnation and reduction-precipitation method using chloropalladate acid as metal precursor. The catalytic performance for phenol in-situ hydrogenation was evaluated under 493 K, 3.5MPa. The results show that Pd/CNTs catalyst has higher selective for phenol in-situ hydrogenation to cyclohexanone. The catalysts have been characterised by CO-TPD and TEM. The mesoporosity structure and inner hollow cavities of Pd/CNTs catalyst are responsible for the distinguished properties.

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