Effects of potassium additive on the activity of Ru catalyst for acetylene hydrochlorination

Jin, Yunhe; Li, Guangbi; Zhang, Jinli; Pu, Yanfeng; Li, Wei

doi:10.1039/c5ra03466c

Cited by 45 publications

(35 citation statements)

References 33 publications

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“…In addition, for the spent catalysts, Figure 5 shows the H 2 -TPR profiles of the synthesized catalysts. The broad peak appeared in the range of 400-800 • C in fresh bare AC relates with the methanation of functional groups (Figure 5a) [18,33]. As mentioned in our previous work, it can be seen that there appear three reduction peaks located at ca.…”

Section: The Coking Deposition On the Catalystsmentioning

confidence: 67%

Synthesis of Vinyl Chloride Monomer over Carbon-Supported Tris-(Triphenylphosphine) Ruthenium Dichloride Catalysts

Zhang

Man

et al. 2018

Catalysts

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A series of catalysts, including Ru/AC, φ-P-Ru/AC, φ-P-Ru/AC-HCl, and φ-P-Ru/AC-HNO 3 , were prepared and evaluated for the hydrochlorination reaction of acetylene. The test results reveal that the φ-P-Ru/AC-HNO 3 catalyst shows superior catalytic performance with an initial acetylene conversion of 97.2% and a relative increment of 87.0% within 48 h in comparison with that of the traditional RuCl 3 catalyst. The substitution of inorganic RuCl 3 precursor by organic φ-P-Ru complex species in the catalysts results in more active species and tends to confine them in the micro-pores; the modification of carbon support by nitric acid in φ-P-Ru catalyst may produce an interaction between the functional groups on modified support and Ru species, which is favorable to anchor and then reduce the loss of active species during the reaction, further increasing the amount of dominating Ru species, and greatly improving the reactants adsorption ability on the catalysts, thus enhancing the performance of the resultant catalysts. The as-prepared φ-P-Ru catalysts are shown to be promising mercury-free candidates for the synthesis of vinyl chloride monomer.

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Section: The Coking Deposition On the Catalystsmentioning

confidence: 67%

Synthesis of Vinyl Chloride Monomer over Carbon-Supported Tris-(Triphenylphosphine) Ruthenium Dichloride Catalysts

Zhang

Man

et al. 2018

Catalysts

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“…The Ru-in-CNT catalyst exhibits an activity that is 50% higher than the Ru particles located on the CNT exterior walls, and acetylene conversion is as high as 95%. To further investigate the Ru-based catalysts, an effective approach is to add K 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 in this reaction [51]. The improved conversion of acetylene can be comprehensively attributed to the increased RuO 2 content, the dispersion of catalysts and the enhancement of the interaction between the product C 2 H 3 Cl and the Ru-based catalysts.…”

Section: Ru-based Catalystsmentioning

confidence: 99%

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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“…have found that the active component of RuO 2 is key for improving the catalytic performance of Ru‐based catalysts via oxidative treatment . Identical conclusions that RuO 2 species acts as the active component have also been drawn by other researchers ,,,. There is a slight difference between the ruthenium component before and after adding DMPU in the XPS results.…”

Section: Resultsmentioning

confidence: 54%

“…reported that 1 %Ru/SAC catalyst showed acetylene conversion of 85 % under 170 °C, and C 2 H 2 GHSV of 180 h −1 . Subsequently, some bimetallic or trimetallic catalysts by introducing the second metal chloride, such as Cu, Co and K, have been developed to improve the activity and stability of the Ru‐based catalysts ,. Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

Achieving Efficient and Low Content Ru‐Based Catalyst for Acetylene Hydrochlorination Based on N,N’‐Dimethylpropyleneurea

Wang

et al. 2018

ChemCatChem

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A new Ru-based catalyst system based on N,N'-Dimethylpropyleneurea (DMPU) was developed for the acetylene hydrochlorination reaction in this study. The optimal 1 % Ru-10 %DMPU/AC catalyst exhibits the best activity with the acetylene conversion of 87.6 % under 170 8C and the GHSV (C 2 H 2 ) of 900 h À1 . Additionally, the Ru-10 %DMPU/AC with lower Ru content (0.2 wt%) displayed excellent activity and stability with acetylene conversion of 81.3 % after 200 h under the conditions of 170 8C and C 2 H 2 GHSV of 180 h À1 . The character-ization results indicate that the presence of DMPU could improve the dispersion of the catalytic species and provide full protection to prevent the sintering of the ruthenium particles and to inhibit the reduction of active ruthenium oxide component. Moreover, the catalytic property, characterizations and theoretical calculation results reveal that the ability to adsorb and activate HCl reactant with the addition of DMPU via its strong hydrogen bonding plays a significant role on the high stability of the Ru-DMPU/AC catalyst system.

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Effects of potassium additive on the activity of Ru catalyst for acetylene hydrochlorination

Abstract: K additive can improve the catalytic activity of Ru-based catalysts through promoting the formation of more active RuO2 species and enhancing the reactant adsorption and product desorption.

Cited by 45 publications

References 33 publications

Synthesis of Vinyl Chloride Monomer over Carbon-Supported Tris-(Triphenylphosphine) Ruthenium Dichloride Catalysts

Synthesis of Vinyl Chloride Monomer over Carbon-Supported Tris-(Triphenylphosphine) Ruthenium Dichloride Catalysts

Development of a Heterogeneous Non-Mercury Catalyst for Acetylene Hydrochlorination

Achieving Efficient and Low Content Ru‐Based Catalyst for Acetylene Hydrochlorination Based on N,N’‐Dimethylpropyleneurea

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