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Applicability of Nickel-Based Catalytic Systems for Hydrodehalogenation of Recalcitrant Halogenated Aromatic Compounds. Catalysts 2021. [DOI: 10.3390/catal11121465] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
This review summarizes recent applications of nickel as a nonprecious metal catalyst in hydrodehalogenation (HDH) reactions of halogenated aromatic compounds (Ar–Xs). Nickel-based HDH catalysts were developed for reductive treatment of both waste containing concentrated Ar–Xs (mainly polychlorinated benzenes) and for wastewater contaminated with Ar–Xs. Ni-catalyzed HDH enables the production of corresponding nonhalogenated aromatic products (Ar–Hs), which are principally further applicable/recyclable and/or Ar–Hs, which are much more biodegradable and can be mineralized during aerobic wastewater treatment. Developed HDH methods enable the utilization of both gaseous hydrogen via the direct HDH process or other chemical reductants as a source of hydrogen utilized in the transfer of the hydrodehalogenation process. This review highlights recent and major developments in Ni-catalyzed hydrodehalogenation topic since 1990.
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The effect of crystal facet (3 1 2) exposure intensity of Ni12P5 nanoparticle on its hydrodechlorination catalytic activity. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2019.107595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Yuan G, Bai J, Lu S, Ren L, Gao B, Mei J, Ma Y, Chen X, Zhang L. MOFs-Assisting Synthesis 3D Ni 12
P 5
Catalyst for Hydrodechlorination of Trichloroethylene. ChemistrySelect 2019. [DOI: 10.1002/slct.201803443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Guojun Yuan
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Jianliang Bai
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Shaoxiang Lu
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Lili Ren
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Bingying Gao
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Jing Mei
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Yusha Ma
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Xu Chen
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Lu Zhang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
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Ning X, Lu Y, Fu H, Wan H, Xu Z, Zheng S. Template-Mediated Ni(II) Dispersion in Mesoporous SiO 2 for Preparation of Highly Dispersed Ni Catalysts: Influence of Template Type. ACS APPLIED MATERIALS & INTERFACES 2017; 9:19335-19344. [PMID: 28498654 DOI: 10.1021/acsami.7b04100] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Supported Ni catalysts on three mesoporous SiO2 supports (i.e., SBA-15, MCM-41, and HMS) were prepared using a solid-state reaction between Ni(NO3)2 and organic template-occluded mesoporous SiO2. For comparison, supported Ni catalysts on mesoporous SiO2 synthesized by the conventional impregnation method were also included. The catalysts were characterized by scanning electron microscopy, X-ray diffraction, UV-vis diffuse reflectance spectroscopy, N2 adsorption, X-ray photoelectron spectroscopy, H2 temperature-programmed reduction, transmission electron microscopy, and transmission electron microscopy-energy-dispersive X-ray. The catalytic properties of the catalysts were evaluated using gas-phase catalytic hydrodechlorination of 1,2-dichloroethane. The results showed that upon grinding Ni(NO3)2 with template-occluded mesoporous SiO2, strong coordination between Ni2+ and dodecylamine was identified in the Ni(NO3)2-HMS system. Additionally, the results of H2 temperature-programmed reduction revealed that NiO in calcined NiO/HMS was reduced at higher temperature than those in calcined NiO/SBA-15 and NiO/MCM-41, reflecting the presence of a strong interaction between NiO and mesoporous SiO2 in NiO/HMS. Consistently, the average particle sizes of metallic Ni were found to be 2.7, 3.4, and 9.6 nm in H2-reduced Ni/HMS, Ni/SBA-15, and Ni/MCM-41, respectively, indicative of a much higher Ni dispersion in Ni/HMS. For the catalytic hydrodechlorination of 1,2-dichloroethane, Ni/MCM-41 synthesized by the solid-state reaction method exhibited a catalytic activity similar to that prepared by the impregnation method, while higher catalytic activities were observed on Ni/HMS and Ni/SBA-15 than on their counterparts prepared by the impregnation method. Furthermore, a higher conversion was identified on Ni/HMS than on Ni/SBA-15 and Ni/MCM-41, highlighting the importance of template type for the preparation of highly dispersed metal catalysts on mesoporous SiO2.
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Affiliation(s)
- Xin Ning
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Yiyuan Lu
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Heyun Fu
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Haiqin Wan
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Zhaoyi Xu
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Shourong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
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Cecilia JA, Infantes-Molina A, Rodríguez-Castellón E. Hydrodechlorination of polychlorinated molecules using transition metal phosphide catalysts. JOURNAL OF HAZARDOUS MATERIALS 2015; 296:112-119. [PMID: 25913677 DOI: 10.1016/j.jhazmat.2015.04.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 03/08/2015] [Accepted: 04/08/2015] [Indexed: 06/04/2023]
Abstract
Ni2P and CoP catalysts (5 wt.% of metal) supported on a commercial SiO2 were tested in the gas phase catalytic hydrodechlorination (HDCl) of mono (chlorobenzene-ClB) and polychlorobenzenes (PCBs) (1,2- dichlorobenzene (1,2-DClB), 1,3-dichlorobenzene (1,3-DClB), 1,4-dichlorobenzene (1,4-DClB), and 1,2,4-trichlorobenzene (1,2,4-TClB)) at atmospheric pressure. It was investigated how the number and position of chlorine atoms in the molecule influence the HDCl activity. The prepared catalysts were characterized by X-ray diffraction (XRD), CO chemisorption, N2 adsorption-desorption at -196°C, and X-ray photoelectron spectroscopy (XPS). Characterization results indicated better active phase dispersion and greater amount of P on the Ni2P catalyst surface. Catalytic results showed that the Ni2P was more active and stable in this type of reactions. The hydrodechlorination activity decreased by increasing the number of chlorine atoms in the molecule and chlorine substituents in close proximity. The observed trend in the HDCl activity was: ClB>1,4-DClB>1,3-DClB>1,2-DClB>1,2,4-TClB. The exception was the catalytic response after 24h on stream observed for the Ni2P in the HDCl reaction of 1,2,4-TClB, which was equal to that observed for the 1,4-DClB molecule, and also yielding benzene as the main reaction product.
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Affiliation(s)
- J A Cecilia
- Departamento de Química Inorgánica, Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain
| | - A Infantes-Molina
- Departamento de Química Inorgánica, Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
| | - E Rodríguez-Castellón
- Departamento de Química Inorgánica, Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain
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Śrębowata A, Kamińska II, Giziński D, Wideł D, Oszczudłowski J. Remarkable effect of soft-templating synthesis procedure on catalytic properties of mesoporous carbon supported Ni in hydrodechlorination of trichloroethylene in liquid phase. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.11.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chen J, Guo T, Li K, Sun L. A facile approach to enhancing activity of Ni2P/SiO2 catalyst for hydrodechlorination of chlorobenzene: promoting effect of water and oxygen. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00044k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Ni2P/SiO2 activity for the hydrodechlorination of chlorobenzene was remarkably enhanced by the treatment with H2O or O2.
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Affiliation(s)
- Jixiang Chen
- Tianjin Key Laboratory of Applied Catalysis Science and Technology
- Department of Catalysis Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Ti Guo
- Tianjin Key Laboratory of Applied Catalysis Science and Technology
- Department of Catalysis Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Kelun Li
- Tianjin Key Laboratory of Applied Catalysis Science and Technology
- Department of Catalysis Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
| | - Lingmin Sun
- Tianjin Key Laboratory of Applied Catalysis Science and Technology
- Department of Catalysis Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
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Li M, Hao Y, Cárdenas-Lizana F, Yiu HHP, Keane MA. ‘‘Hydrogen-Free’’ Hydrogenation of Nitrobenzene Over Cu/SiO2 Via Coupling with 2-Butanol Dehydrogenation. Top Catal 2014. [DOI: 10.1007/s11244-014-0354-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Effect of H2S pre-treatment on structure and activity of Ni2P/SiO2 catalyst for hydrodechlorination of chlorobenzene. CHINESE JOURNAL OF CATALYSIS 2013. [DOI: 10.1016/s1872-2067(12)60595-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Grause G, Karakita D, Ishibashi J, Kameda T, Bhaskar T, Yoshioka T. TG-MS investigation of brominated products from the degradation of brominated flame retardants in high-impact polystyrene. CHEMOSPHERE 2011; 85:368-373. [PMID: 21764419 DOI: 10.1016/j.chemosphere.2011.06.104] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 06/17/2011] [Accepted: 06/23/2011] [Indexed: 05/31/2023]
Abstract
The thermal degradation of flame retardant containing high-impact polystyrene (HIPS-Br), one of the most commonly employed plastics in electric and electronic appliances, was examined by thermogravimetry coupled with mass spectroscopy (TG-MS) in order to understand the threat that is posed by the release of hazardous brominated compounds. The HIPS samples contained decabromodiphenylether (DPE) and decabromodibenzyl (DDB) as the flame retardants as well as Sb2O3 as the synergist. The largest number of brominated compounds was obtained in the presence of DPE and Sb2O3 and DDB without Sb2O3. From the degradation of DPE, brominated benzenes, phenols, diphenylethers, and dibenzofurans were identified, and from the degradation of DDB, brominated benzenes, dibenzyls, and phenanthrenes were formed. The interaction between the flame retardant and the polymer matrix resulted in α-bromoethylbenzene. The formation of brominated dibenzodioxins was not observed, probably, due to the low phenol concentration in the polymer melt. No other report has, to our knowledge, ever reported on the formation of brominated phenanthrenes from flame retardants. Because they share similar steric features, it may well be that brominated phenanthrenes are similar in their carcinogen and mutagen potential to dibenzofurans and dibenzodioxins. A plausible mechanism for the formation of the observed compounds is presented, and the role of the synergist is considered.
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Affiliation(s)
- Guido Grause
- Graduate School of Environmental Studies, Tohoku University, Aramaki Aza Aoba 6-6-11, Aoba-ku Sendai 980-8579, Japan.
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13
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Solvent effects in the catalytic hydrotreament of haloaromatics over Pd/Al2O3 in water+organic mixtures. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2010.03.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Lee AF, Prabhakaran V, Wilson K. Surface X-ray studies of catalytic clean technologies. Chem Commun (Camb) 2010; 46:3827-42. [DOI: 10.1039/c002853c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Veriansyah B, Choi HM, Lee YW, Kang JW, Kim JD, Kim J. Continuous catalytic hydrodechlorination of polychlorinated biphenyls (PCBs) in transformer oil. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2009; 44:1538-1544. [PMID: 20183511 DOI: 10.1080/10934520903263421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Continuous catalytic hydrodechlorination of polychlorinated biphenyls (PCBs) in the presence of transformer oils was carried out in a fixed bed reactor using a 57.6 wt% Ni on silicon oxide-aluminum oxide (SiO(2)-Al(2)O(3)) catalyst. Reaction temperatures ranging 150-300 degrees C, PCBs concentrations ranging 50-200 ppm, and reaction times ranging 1-8 h were tested. At a higher reaction temperature or at a lower PCBs concentration, catalytic activity was higher and complete dechlorination of PCBs resulted even at long reaction time. Catalyst regeneration using hexane and 0.1 M sodium hydroxide (NaOH) was effective to restore the catalytic activity. Fresh, spent and regenerated catalysts were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. XRD analysis revealed growth of Ni crystallite size of the spent and the regenerated catalysts. XPS analysis showed that a considerable amount of chlorine and carbon species were deposited on the surface of the spent catalyst, which may play a role in the catalysts deactivation.
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Affiliation(s)
- Bambang Veriansyah
- Energy and Environmental Research Division, Korea Institute of Science and Technology, Seoul, Korea
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17
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Keane M, Gómez-Quero S, Cárdenas-Lizana F, Shen W. Alumina-Supported Ni-Au: Surface Synergistic Effects in Catalytic Hydrodechlorination. ChemCatChem 2009. [DOI: 10.1002/cctc.200900070] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Legawiec-Jarzyna M, Juszczyk W, Bonarowska M, Kaszkur Z, Kępiński L, Kowalczyk Z, Karpiński Z. Hydrodechlorination of CCl4 on Pt–Au/Al2O3 Catalysts. Top Catal 2009. [DOI: 10.1007/s11244-009-9258-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Chen J, Zhou J, Wang R, Zhang J. Preparation, Characterization, and Performance of HMS-Supported Ni Catalysts for Hydrodechlorination of Chorobenzene. Ind Eng Chem Res 2009. [DOI: 10.1021/ie801792h] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jixiang Chen
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jianjun Zhou
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Rijie Wang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jiyan Zhang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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Abstract
Waste not, want not: The increase in waste polymer generation, which continues to exceed recycle, represents a critical environmental burden. However, plastic waste may be viewed as a potential resource and, with the correct treatment, can serve as hydrocarbon raw material or as fuel oil, as described in this Minireview.Effective waste management must address waste reduction, reuse, recovery, and recycle. The consumption of plastics continues to grow, and, while plastic recycle has seen a significant increase since the early 1990s, consumption still far exceeds recycle. However, waste plastic can be viewed as a potential resource and can serve, with the correct treatment, as hydrocarbon raw material or as fuel oil. This Minireview considers the role of catalysis in waste polymer reprocessing and provides a critical overview of the existing waste plastic treatment technologies. Thermal pyrolysis results in a random scissioning of the polymer chains, generating products with varying molecular weights. Catalytic degradation provides control over the product composition/distribution and serves to lower significantly the degradation temperature. Incineration of waste PVC is very energy demanding and can result in the formation of toxic chloro emissions. The efficacy of a catalytic transformation of PVC is also discussed.
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Affiliation(s)
- Mark A Keane
- Chemical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK.
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21
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One Pot Synthesis of Imines from Aromatic Nitro Compounds with a Novel Ni/SiO2 Magnetic Catalyst. Catal Letters 2008. [DOI: 10.1007/s10562-008-9774-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ding E, Jujjuri S, Sturgeon M, Shore SG, Keane MA. Novel one step preparation of silica supported Pd/Sr and Pd/Ba catalysts via an organometallic precursor: Application in hydrodechlorination and hydrogenation. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.07.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Liu X, Chen J, Zhang J. Hydrodechlorination of Chlorobenzene over Silica-Supported Nickel Phosphide Catalysts. Ind Eng Chem Res 2008. [DOI: 10.1021/ie7017542] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xuguang Liu
- Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P.R. China
| | - Jixiang Chen
- Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P.R. China
| | - Jiyan Zhang
- Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P.R. China
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A Green Reduction of Aromatic Nitro Compounds to Aromatic Amines Over a Novel Ni/SiO2 Catalyst Passivated with a Gas Mixture. Catal Letters 2008. [DOI: 10.1007/s10562-008-9452-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Gas-phase Hydrodechlorination of Chlorobenzene Over Silica-supported Ni2P Catalysts Prepared Under Different Reduction Conditions. Catal Letters 2007. [DOI: 10.1007/s10562-007-9363-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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Liu X, Chen J, Zhang J. A novel catalyst for gas phase hydrodechlorination of chlorobenzene: Silica supported Ni3P. CATAL COMMUN 2007. [DOI: 10.1016/j.catcom.2007.03.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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A characterization of Ln-Pd/SiO2 (Ln=La, Ce, Sm, Eu, Gd and Yb): Correlation of surface chemistry with hydrogenolysis activity. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.03.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Hydrodechlorination of 1,2-dichloroethane on active carbon supported palladium–nickel catalysts. Catal Today 2007. [DOI: 10.1016/j.cattod.2007.02.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Synthesis and high performance of ceria supported nickel catalysts for hydrodechlorination reaction. CATAL COMMUN 2006. [DOI: 10.1016/j.catcom.2006.04.013] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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30
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Keane MA, Jacobs G, Patterson PM. Ni/SiO2 promoted growth of carbon nanofibers from chlorobenzene: Characterization of the active metal sites. J Colloid Interface Sci 2006; 302:576-88. [PMID: 16860817 DOI: 10.1016/j.jcis.2006.06.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2006] [Revised: 06/16/2006] [Accepted: 06/29/2006] [Indexed: 11/26/2022]
Abstract
The temporal changes to supported Ni sites during the growth of graphitic carbon nanofibers (GCNs) via the decomposition of chlorobenzene over Ni/SiO2 at 873 K have been investigated. The reaction of chlorobenzene with hydrogen also generated benzene, via catalytic hydrodechlorination, as the principal competing reaction. Reaction selectivity was found to be time dependent with a switch from a preferential hydrodechlorination to a predominant decomposition that generated an increasingly more structured carbon product over prolonged time-on-stream. These findings are discussed in terms of Cl/catalyst interaction(s) leading to metal site restructuring, the latter manifest in a sintering and faceting of the Ni metal particles. The pressure exerted on the metal/support interface due to fiber formation was of sufficient magnitude to extract the Ni particle from the support; the occurrence of an entrapped Ni particle at the fiber tip is a feature common to the majority of GCNs with the incorporation of Ni fragments along the length of the GCN. Metal site restructuring has been probed by temperature-programmed reduction of the passivated samples, H2 chemisorption/temperature-programmed desorption (TPD) and XANES/EXAFS analyses. This restructuring serves to enhance destructive chemisorption and/or facilitate carbon diffusion to generate the resultant GCN. The nature of the carbonaceous product has been characterized by a combination of TEM-EDX, SEM, XRD and temperature-programmed oxidation (TPO).
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Affiliation(s)
- Mark A Keane
- Chemical Engineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK.
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Kim P, Kim H, Joo JB, Kim W, Song IK, Yi J. Effect of nickel precursor on the catalytic performance of Ni/Al2O3 catalysts in the hydrodechlorination of 1,1,2-trichloroethane. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2006.04.061] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Kim P, Joo J, Kim H, Kim W, Kim Y, Song I, Yi J. Preparation of Mesoporous Ni–alumina Catalyst by One-step Sol–gel Method: Control of Textural Properties and Catalytic Application to the Hydrodechlorination of o-dichlorobenzene. Catal Letters 2005. [DOI: 10.1007/s10562-005-7949-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Yuan G, Lopez JL, Louis C, Delannoy L, Keane MA. Remarkable hydrodechlorination activity over silica supported nickel/gold catalysts. CATAL COMMUN 2005. [DOI: 10.1016/j.catcom.2005.05.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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34
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C–X bond reactivity in the catalytic hydrodehalogenation of haloarenes over unsupported and silica supported Ni. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.molcata.2004.08.038] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Screening of Pd and Ni supported on sol–gel derived oxides for dichloromethane hydrodechlorination. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.08.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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