Studies of silica-supported metal chloride catalysts for the vapor-phase hydrochlorination of acetylene

Smith, D. Moody; Walsh, PH; Slager, T. L.

doi:10.1016/0021-9517(68)90018-3

Cited by 58 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, exploring a low cost catalyst Figure 1 displays the catalytic performances of these Ru-based catalysts for the acetylene hydrochlorination reaction. It can be seen that the NH 4 Cl/AC catalyst exhibits a catalytic activity which is as low as the support AC. The result indicates that the NH 4 Cl species has no catalytic activity for this reaction.…”

Section: Introductionmentioning

confidence: 98%

“…It can be seen that the NH 4 Cl/AC catalyst exhibits a catalytic activity which is as low as the support AC. The result indicates that the NH 4 Cl species has no catalytic activity for this reaction. The RuCl 3 /AC catalyst shows an initial acetylene conversion of 78.8%, and decreases to 68.2% after 48 h reaction ( Figure 1a).…”

Section: Introductionmentioning

confidence: 98%

“…The result suggests that the Ru species in the complex (NH 4 ) 2 RuCl 6 /AC catalyst exist mainly in the form of high valence ruthenium. Additionally, the higher reduction temperature of the Ru 4+ species in the (NH 4 ) 2 RuCl 6 /AC catalyst suggests that the presence of NH 4 + cation can stabilize the Ru 4+ species and inhibit its reduction to metallic Ru.…”

Section: The Dispersion Of Active Speciesmentioning

confidence: 99%

“…The result indicates that the carbon deposition on the surface of the catalyst occurs during the reaction owing to the polymerization of C 2 H 2 and VCM. This is the reason why the catalytic activities of the RuCl 3 /AC and (NH 4 TG analysis is used to show the amount of coke deposited on the used catalysts to explain the reason for the deactivation of catalysts. Figure 2 shows the TG analysis profiles of the both fresh and used RuCl 3 /AC and (NH 4 ) 2 RuCl 6 /AC catalysts.…”

Section: Catalyst Texture Propertiesmentioning

confidence: 99%

“…In 1968, Smith et al carried out a series of silica-supported metal chloride catalysts for acetylene hydrochlorination, and concluded that catalytic activity could be correlated with the electron affinity of the metallic cation [4]. Next, in 1975, Shinoda studied over 20 types of metal chlorides for acetylene hydrochlorination reaction [5].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Hydrochlorination of Acetylene Catalyzed by an Activated Carbon-Supported Ammonium Hexachlororuthenate Complex

Gao

Zhang

et al. 2017

Catalysts

View full text Add to dashboard Cite

Ammonium hexachlororuthenate ((NH 4 ) 2 RuCl 6 ) complex was used as a catalyst precursor and coconut activated carbon (AC) was used as the support in the preparation process of the Ru-based catalyst. (NH 4 ) 2 RuCl 6 /AC catalyst was prepared via an incipient wetness impregnation method and assessed in an acetylene hydrochlorination reaction. Meanwhile, the (NH 4 ) 2 RuCl 6 /AC catalyst was analyzed with low-temperature N 2 adsorption/desorption, thermogravimetry (TG), transmission electron microscopy (TEM), temperature programmed reduction (TPR), X-ray photoelectron spectra (XPS), and temperature programmed desorption (TPD) techniques. Catalytic performance test results show that the (NH 4 ) 2 RuCl 6 /AC catalyst exhibits a superior catalytic activity with the highest acetylene conversion of 90.5% under the conditions of 170 • C and an acetylene gas hourly space velocity of 180 h −1 . The characterization results illustrate that the presence of the NH 4 + cation can inhibit coke deposition as well as the agglomeration of ruthenium particles, and it can also enhance the adsorption ability for reactant HCl, hence improving the catalytic activity and stability.

show abstract

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Section: The Dispersion Of Active Speciesmentioning

confidence: 99%

Section: Catalyst Texture Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hydrochlorination of Acetylene Catalyzed by an Activated Carbon-Supported Ammonium Hexachlororuthenate Complex

Gao

Zhang

et al. 2017

Catalysts

View full text Add to dashboard Cite

show abstract

Reaction‐Induced Formation of Stable Mononuclear Cu(I)Cl Species on Carbon for Low‐Footprint Vinyl Chloride Production

et al. 2023

View full text Add to dashboard Cite

Copper catalysts are attractive candidates for Hg-free vinyl chloride monomer (VCM) production via acetylene hydrochlorination due to their non-toxic nature and high stability. However, the optimal architecture for Cu-based catalysts at the nanoscale is not yet fully understood. To address this gap, the metal precursor and the annealing temperature are modified to prepare copper nanoparticles or single atoms, either in chlorinated or ligand-free form, on an unmodified carbon support. Evaluation in the reaction reveals a remarkable convergence of the performance of all materials to the stable VCM productivity of the single-atom catalyst. In-depth characterization by advanced microscopy, quasi in situ and operando spectroscopy, and simulations uncover a reaction-induced formation of low-valent, single atom Cu(I)Cl site motif, regardless of the initial nanostructure. Various surface oxygen groups promote nanoparticle redispersion by stabilizing single-atom CuCl x species. The anchoring site structure does not strongly influence the acetylene adsorption energy or the crucial role they play in stabilizing key reaction intermediates. A life-cycle assessment demonstrates the potential environmental benefits of copper catalysts over state-of-the-art alternatives. This work contributes to a better understanding of optimal metal speciation and highlights the sustainability of Cu-based catalysts for VCM production.

show abstract

Enhanced Catalytic Performance of Palladium‐Based Catalysts Modified With the Dibenzofuran Ligand for Acetylene Hydrochlorination

Ali,

Wang,

Yan

et al. 2024

Applied Organom Chemis

View full text Add to dashboard Cite

A new palladium‐based catalyst system modified with dibenzofuran (DBF) was developed for acetylene hydrochlorination. The optimal Pd‐DBF/SAC catalyst with the 0.5 wt% Pd loading and the 15 wt% DBF loading exhibits an elevated performance of 99.9% acetylene conversion and 99.9% vinyl chloride selectivity for more than 400 h. Characterization analysis and density functional theory (DFT) simulations revealed that the presence of oxygen‐containing DBF species of the Pd‐DBF/SAC catalyst prevents the reduction and loss of Pd species, inhibits the carbon deposition and enhances the HCl adsorbability, resulting in superior catalytic activity and stability for acetylene hydrochlorination.

show abstract

Studies of silica-supported metal chloride catalysts for the vapor-phase hydrochlorination of acetylene

Cited by 58 publications

References 11 publications

Hydrochlorination of Acetylene Catalyzed by an Activated Carbon-Supported Ammonium Hexachlororuthenate Complex

Hydrochlorination of Acetylene Catalyzed by an Activated Carbon-Supported Ammonium Hexachlororuthenate Complex

Reaction‐Induced Formation of Stable Mononuclear Cu(I)Cl Species on Carbon for Low‐Footprint Vinyl Chloride Production

Enhanced Catalytic Performance of Palladium‐Based Catalysts Modified With the Dibenzofuran Ligand for Acetylene Hydrochlorination

Contact Info

Product

Resources

About