Non-mercury catalytic acetylene hydrochlorination over spherical activated-carbon-supported Au–Co(III)–Cu(II) catalysts

Zhang, Haiyang; Dai, Bin; Li, Wei; Wang, Xugen; Zhang, Jinli; Gu, Junjie

doi:10.1016/j.jcat.2014.05.005

Cited by 110 publications

(64 citation statements)

References 38 publications

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“…Conte et al attempted to enhance the gold dispersion and improve the stability of its higher oxidation state by the addition of a second metal (Pd, Pt, Ru, Ir, Rh) [27]. Although the results of these synthesized bimetal catalysts are not satisfactory, they concluded that (1) Au-Pd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 catalysts, including AuCu [28], AuLa [29], AuBa [30], AuNi [31], AuCs [32,33], AuBi [14], AuTiO 2 [34], and AuCoCu [35], were synthesized and applied to acetylene hydrochlorination by different laboratories, and the results are listed in Table 2.…”

Section: Au-based Catalystsmentioning

confidence: 99%

“…2 shows, an approximate 99.7% conversion of acetylene with a selectivity above 99.9% for VCM was obtained over the Au-Co(III)-Cu(II) catalysts with sphere active carbon (SAC) as support. Acetylene conversion then decreased gradually to 48.1% after 270 h. Then, a gas hourly space velocity (GHSV) of C 2 H 2 was adjusted to 30 h -1 , and this change increased the acetylene conversion to 99.7% within 15 h. Therefore, the lifetime of the ternary catalyst was longer than 6513 h [35]. The rate-determining step of acetylene hydrochlorination was the adsorption of HCl.…”

Section: Au-based Catalystsmentioning

confidence: 99%

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Development of a Heterogeneous Non-Mercury Catalyst for Acetylene Hydrochlorination

et al. 2015

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Due to the toxicity of mercury catalysts, a non-mercury heterogeneous catalyst for acetylene hydrochlorination has been widely investigated. In this review, we introduce the development of Au-based catalysts, Ru-based catalysts, other metal catalysts and a carbon nitride catalyst. The effect of the promoter and the carbon support property on the catalytic performance of the AuCl 3 catalyst is discussed in detail and the potential application of other catalysts is also reviewed on the basis of experimental and theoretical studies. At present, it is predicted that an Au-based catalyst may be the optimal candidate catalyst for industrial application in the production of polyvinyl chloride from calcium carbide, but other catalysts should still be further investigated to improve their catalytic performance and their cost advantages.

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Section: Au-based Catalystsmentioning

confidence: 99%

Section: Au-based Catalystsmentioning

confidence: 99%

Development of a Heterogeneous Non-Mercury Catalyst for Acetylene Hydrochlorination

et al. 2015

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“…30 Over 1Au4Cs I /AC catalysts, the maximum conversion of acetylene was 94% and there was only 5% C 2 H 2 conversion loss after 50 h running under the reaction conditions of C 2 H 2 with an hourly space velocity of 740 h -1 . In a more recent report, Dai et al 31 proposed novel Au- 10 Co(III)-Cu(II) trimetallic structured catalysts, and they assessed them for their ability to promote acetylene hydrochlorination. The long-term stability observed in this work indicates that the ternary Au1Co(III)3Cu(II)1/SAC catalyst can maintain high catalytic activity for at least 6513 h at a low GHSV(C 2 H 2 ) of 30 h -1 .…”

Section: Introductionmentioning

confidence: 99%

Activated carbon supported ternary gold–cesium(i)–indium(iii) catalyst for the hydrochlorination of acetylene

Zhao

Zhang

et al. 2015

Catal. Sci. Technol.

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Commercialization of acetylene hydrochlorination using AuCl 3 catalysts has been impeded by its poor stability. We have been studying CsCl as a promoter, which can improve acetylene hydrochlorination activity as well as have resistance to catalytic deactivation. In III -added to the Au-Cs I /AC catalysts worked as efficient catalysts for the hydrochlorination of acetylene to vinyl chloride. A 10 series of trimetallic catalysts (1AuxIn III 4Cs I /AC with x = 0.5, 1, 2, 3) were prepared and assessed for their ability to promote hydrochlorination of acetylene. The enhancement of stability observed for Au/In III /Cs I weight ratio of 1:1:4 was particularly remarkable. It delivered a stable performance within the conversion of acetylene, reaching more than 92.8% and there was only 3.7% C 2 H 2 conversion loss after 50 h running under the reaction conditions of temperature 180 °C and C 2 H 2 hourly space velocity of 1480 h -1 . 15 Moreover, the 1Au1In III 4Cs I /AC catalyst delivered a stable performance with an estimated lifetime exceeding 6520 h at C 2 H 2 hourly space velocity of 50 h -1 . H 2 -TPR, TEM, HCl-TPD, C 2 H 2 -TPD, XPS and TGA techniques were further applied to reveal the structural information on the Au-In III -Cs I /AC catalysts. The results reveal that the addition of InCl 3 increased the electron density of Au 3+ species via electron transfer from In atoms to Au 3+ center can increase the adsorption of hydrogen chloride and therefore 20 improve the catalytic stability. These results demonstrate that the addition of metal additives CsCl and InCl 3 results in a synergistic effect to enhance the activity and the stability of Au-based catalysts. The excellent catalytic performance of the 1Au1In III 4Cs I /AC catalyst demonstrated its potential as an alternative to mercury chloride catalysts for acetylene hydrochlorination.

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“…168 Dai and Zhang found the addition of Co(III) could significantly inhibit carbon deposition and improve stability of the gold catalysts. 169,170 XPS analysis demonstrated that there was a considerable amount of cationic gold species (16.6% Au 3+ and 18.4% of Au + ) in the fresh AuCo(III) catalyst, and the content of the cationic gold species in the used catalyst (12.5% Au 3+ and 27.3% Au + ) remained constant, which indicated that the addition of Co(III) inhibited the reduction of the cationic gold into Au(0). 169 The similar effect was also observed in Wei and Luo's work.…”

Section: Alkyne Activationmentioning

confidence: 97%

Organic Synthesis Catalyzed by Supported Gold Nanoparticles

Liu¹,

Knight²,

Hutchings³

2015

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

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Non-mercury catalytic acetylene hydrochlorination over spherical activated-carbon-supported Au–Co(III)–Cu(II) catalysts

Cited by 110 publications

References 38 publications

Development of a Heterogeneous Non-Mercury Catalyst for Acetylene Hydrochlorination

Development of a Heterogeneous Non-Mercury Catalyst for Acetylene Hydrochlorination

Activated carbon supported ternary gold–cesium(i)–indium(iii) catalyst for the hydrochlorination of acetylene

Organic Synthesis Catalyzed by Supported Gold Nanoparticles

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