Design of choline chloride modified USY zeolites for palladium-catalyzed acetylene hydrochlorination

Long, Zeqing; Wang, Lu; Yan, Honggao; Si, Jianxin; Zhang, Meng; Wang, Jide; Zhao, Liang; Yang, Chao; Wu, Ren‐Jang

doi:10.1039/d2ra01142e

Cited by 9 publications

(5 citation statements)

References 81 publications

(126 reference statements)

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“…72 In addition, several works report the enhanced lifetime of Pd NPs with the modifications of different promoters such as B 35 and organic amines. 76,77 In addition to the depressed accumulation of coke deposits, the retention of Pd 2+ from reduction to Pd 0 was also claimed to be crucial for the enhanced stability performance. 35,75 In fact, the Pd 2+ /Pd 0 pair might directly participate in the hydrochlorination cycle as has been proposed by Xing and the co-workers (Figure 7).…”

Section: Palladium-based Catalystsmentioning

confidence: 99%

“…It was later claimed that abundant IL droplets containing NPs can be generated under the reactant flow which might serve as microreactors for the catalysis; meanwhile the low-viscosity organic phase enabled the rapid mass transfer of the substances . In addition, several works report the enhanced lifetime of Pd NPs with the modifications of different promoters such as B and organic amines. , In addition to the depressed accumulation of coke deposits, the retention of Pd 2+ from reduction to Pd 0 was also claimed to be crucial for the enhanced stability performance. , In fact, the Pd 2+ /Pd 0 pair might directly participate in the hydrochlorination cycle as has been proposed by Xing and the co-workers (Figure ). …”

Section: Precious-metal-based Single-atom Catalystsmentioning

confidence: 99%

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Advances in Single-Atom-Catalyzed Acetylene Hydrochlorination

Chen,

Wang,

Zhao

et al. 2024

ACS Catal.

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The growing demand for polyvinyl chloride (PVC) calls for a cleaner technology for its production. Nonetheless, acetylene hydrochlorination, an industrially relevant technology for the manufacture of vinyl chloride monomer of PVC, is hampered by the use of toxic and volatile mercury chloride catalysts that pose severe threads to human health and the environments. This stimulated numerous research studies in the past decades on hunting alternative candidates to replace the mercury catalysts. Among the large numbers of catalyst families, distinct single-atom metal catalysts have been predicted or demonstrated as promising catalytic systems in the hydrochlorination chemistry, thus stimulating a wave in the broader explorations of this distinctive catalyst group in the last five years. In this Review, we summarize the recent advances of singleatom catalysts in acetylene hydrochlorination with the focus on their synthesis methods, catalytic performance, and reaction mechanism. The catalyst categories include single metal atoms of Au, Pt, Pd, Ru, Cu, and Fe and diatomic systems. Perspectives on the challenges and directions for future development regarding the innovation of synthetic strategies, recognition of performance descriptors, and developments of on-site characterization techniques are provided.

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Section: Palladium-based Catalystsmentioning

confidence: 99%

Section: Precious-metal-based Single-atom Catalystsmentioning

confidence: 99%

Advances in Single-Atom-Catalyzed Acetylene Hydrochlorination

Chen,

Wang,

Zhao

et al. 2024

ACS Catal.

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show abstract

“…[71] In addition, several works report the enhanced lifetime of Pd NPs with the modifications of different promoters such as B [35] and organic amines. [75,76] In addition to the depressed accumulation of coke deposits, the retention of Pd 2+ from reduction to Pd 0 was also claimed to be crucial for the enhanced stability performance. [35,75] In fact, the Pd 2+ /Pd 0 pair might directly participate in the hydrochlorination cycle as has been proposed by Xing and the coworkers (Figure 7 ).…”

Section: Platinum-based Catalystsmentioning

confidence: 99%

Advances in Single-Atom-Catalyzed Acetylene Hydrochlorination

Chen,

Wang,

Zhao

et al. 2024

Preprint

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The growing demand of PVC calls for a more sustainable technology for its production. Nonetheless, acetylene hydrochlorination, an industrially relevant technology for the manufacture of vinyl chloride monomer of PVC, is hampered by the use of toxic and volatile mercury chloride catalysts that poses severe threads to human health and the environments. This stimulates numerous researches in the past decades on hunting alternative candidates to replace the mercury catalysts. Among the large numbers of catalyst fami-lies, distinct single-atom metal catalysts have been predicted or demonstrated as promising catalytic systems in the hydrochlorina-tion chemistry, thus stimulating a new wave in the broader explorations of this distinctive catalyst groups in the last five years. In this Review, we summarize the recent advances of single-atom catalysts in acetylene hydrochlorination with the focus on their syn-thesis methods, catalytic performance, and reaction mechanism. The catalyst categories include single metal atoms of Au, Pt, Pd, Ru, Cu, and Fe, and diatomic systems. Perspectives on the challenges and directions for future development regarding the innovation of synthetic strategy, recognition of performance descriptors, and developments of on-site characterization techniques are provided.

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“…The signing of the Minamata Convention has forced vinyl chloride monomer (VCM) producers to phase out the mercury catalyst by 2025 . Thus, many metal-based alternative catalysts have been studied, including gold, − platinum, palladium, − bismuth, ruthenium, − and copper, − and some precious metals, such as Au and Ru, have shown promising catalytic activity. However, AC-supported metal chloride catalysts can be easily deactivated by the coking and reduction of metallic species, e.g., Au 3+ to Au 0 .…”

Section: Introductionmentioning

confidence: 99%

Efficient Hydrochlorination of Acetylene by the Ag–Ru Bimetallic Catalyst in a Deep Eutectic Solvent

Shao,

Lu,

Meng

et al. 2024

Ind. Eng. Chem. Res.

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A series of Ag−Ru/AC bimetallic catalysts were synthesized for acetylene hydrochlorination using a deep eutectic solvent (DES) as the dispersant. Their structures were characterized using transmission electron microscopy (TEM), Xray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and temperature programmed desorption (TPD), and the catalytic performance was assessed at varying conditions. Among them, 5Ag-0.07Ru-10DES/AC showed the best catalytic performance, with 97.6% acetylene conversion at 180 °C, GHSV (C 2 H 2 ) = 180 h −1 , and V HCl /V Cd 2 Hd 2 = 1−1.25. DES promoted the dispersion of metal particles, enhanced the adsorption and reactivity of HCl, and reduced the coking of the catalyst. The interaction among 1-ethyl-3-methylimidazolium chloride ([Emim]Cl), reactants, and products was studied using density functional theory (DFT) calculations, the synergistic mechanism of the bimetallic catalyst was justified, and the influence of [Emim]Cl on the catalytic performance was revealed. This work provided a theoretical basis for the development of efficient nonmercury catalysts for acetylene hydrochlorination.

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Design of choline chloride modified USY zeolites for palladium-catalyzed acetylene hydrochlorination

Abstract: USY zeolites (USY) were applied to design and synthesize palladium-based heterogeneous catalysts for exploring an efficient non-mercuric catalyst for acetylene hydrochlorination.

Cited by 9 publications

References 81 publications

Advances in Single-Atom-Catalyzed Acetylene Hydrochlorination

Advances in Single-Atom-Catalyzed Acetylene Hydrochlorination

Advances in Single-Atom-Catalyzed Acetylene Hydrochlorination

Efficient Hydrochlorination of Acetylene by the Ag–Ru Bimetallic Catalyst in a Deep Eutectic Solvent

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