Development of a model for an industrial acetylene hydrogenation reactor using plant data – Part I

Rijo, Bruna; Lemos, F.; Fonseca, Isabel; Vilelas, André

doi:10.1016/j.cej.2019.122390

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…Noticeably, the E a values decrease in the sequence PdAg/M-Al 2 O 3 -24 > PdAg/M-Al 2 O 3 -18 > PdAg/M-Al 2 O 3 -12 > PdAg/Al 2 O 3 , which indicates the highly dispersed active sites are facilitated to reduce E a . This can be ascribed to the isolated Pd sites brought by the highly dispersed nanoparticles, which reduce the activation barrier and contribute to the increase of hydrogenation activity. , …”

Section: Resultsmentioning

confidence: 99%

“…The selective acetylene hydrogenation to ethylene over the catalysts is the most attractive method for solving the above problem. In this process, acetylene must be reduced to less than 5 ppm, while the ethylene cannot be significantly hydrogenated. , Therefore, it is important to fabricate acetylene hydrogenation catalysts that can achieve high selectivities under high conversion . Our group fabricated a high-performance selective acetylene hydrogenation catalyst with higher dispersion by using NiTi layered doubl hydroxide (NiTi-LDH) as the support.…”

Section: Introductionmentioning

confidence: 99%

“…47 This can be ascribed to the isolated Pd sites brought by the highly dispersed nanoparticles, which reduce the activation barrier and contribute to the increase of hydrogenation activity. 18,29 The selectivities toward ethane of the four catalysts are shown in Figure 5C. For all catalysts, the selectivity toward ethane decreases with the reaction temperature increase.…”

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confidence: 99%

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Array Modified Molded Alumina Supported PdAg Catalyst for Selective Acetylene Hydrogenation: Intrinsic Kinetics Enhancement and Thermal Effect Optimization

Cai

Wang

et al. 2021

Ind. Eng. Chem. Res.

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High temperature calcined spherical alumina material with macroporous structure is widely used in the typical strong exothermic industrial catalytic process due to its good heat transfer ability. Aiming at the problem that its low surface area limits the dispersion of active metals, an in situ growth method is applied to fabricate an alumina array on spherical alumina, while maintaining the heat transfer advantages. Taking the as-obtained modified alumina as support, a highly dispersed PdAg catalyst for selective hydrogenation of acetylene is synthesized, which exhibits a remarkable enhanced intrinsic activity. Moreover, when the conversion of acetylene reaches 90%, the selectivity toward ethylene still remains 89%. Preferred selectivity is assigned to more isolated Pd sites as well as high electronic density, which facilitates the desorption of the resulting ethylene. More importantly, the array modified catalyst exhibits good structural stability and resistance to carbon deposition. From one aspect, the decrease of the heat production rate over a single active site is conducive to reducing the reaction heat accumulation, thereby avoiding the formation of hot spots over the catalyst, which is a necessary condition for the endothermic reaction of carbon deposition. From another point of view, both the new generated outer opening pore structure and the original macroporous structure of the molded alumina are beneficial for the heat transfer.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Array Modified Molded Alumina Supported PdAg Catalyst for Selective Acetylene Hydrogenation: Intrinsic Kinetics Enhancement and Thermal Effect Optimization

Cai

Wang

et al. 2021

Ind. Eng. Chem. Res.

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“…The mathematical models for selective hydrogenation of acetylene hydrocarbons are described in [11][12][13]. Some kinetic models for selective propylene and methylacetylene hydrogenation reactions on industrial catalyst G-55A (Süd-Chemie) were proposed in [11].…”

Section: Introductionmentioning

confidence: 99%

“…Some kinetic models for selective propylene and methylacetylene hydrogenation reactions on industrial catalyst G-55A (Süd-Chemie) were proposed in [11]. The model of an industrial acetylene hydrogenation reaction for mixture of front-end type was developed in [12]. The optimization of an industrial methylacetylene and propanediene hydrogenation reactor was performed in [13].…”

Section: Introductionmentioning

confidence: 99%

Studying the Selective Methylacetylene Hydrogenation Reaction in Methylacetylene–Propylene Mixtures on Palladium Oxide Nanocatalysts

Писаренко

Ponomaryov

Pisarenko³

2021

Theor Found Chem Eng

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The mechanism and kinetics of the selective catalytic methylacetylene hydrogenation reaction in propane-propylene gas mixtures were studied until the complete consumption of methylacetylene in them on the Pd nanocatalyst (Pd/α-Al 2 O 3 ) promoted by metals from Groups I, II, and VI of Mendeleev's Periodic Table at a Pd content of 0.05 wt %. The experiments were performed in an isothermic plug flow reactor of 100 cm 3 in volume and a bench polytropic reactor of 8 dm 3 in volume. The experiments were carried out by varying the feedstock hourly space velocity from 2000 to 3000 h -1 , the reaction mixture temperature from 303 to 420 K, and the molar hydrogen/methylacetylene ratio from 1.5 to 3.0. Overall, 40 experiments in the isothermic flow-type reactor and 30 experiments in the bench polytropic reactor were carried out. Based on the results of laboratory experiments, a stagewise mechanism was proposed for this catalytic reaction, and the kinetic model corresponding to this mechanism was constructed. The model constants were estimated by the least-squares technique. For the studied reaction, the selective region where there was no methylacetylene, and the propylene concentration in the outlet flow was higher than in the initial flow of reagents, was determined.

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Promotion of Mg(OH)2 in Cu-Based Catalysts for Selective Hydrogenation of Acetylene

Liu,

Zeng,

et al. 2024

Catal Lett

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Development of a model for an industrial acetylene hydrogenation reactor using plant data – Part I

Cited by 7 publications

References 27 publications

Array Modified Molded Alumina Supported PdAg Catalyst for Selective Acetylene Hydrogenation: Intrinsic Kinetics Enhancement and Thermal Effect Optimization

Array Modified Molded Alumina Supported PdAg Catalyst for Selective Acetylene Hydrogenation: Intrinsic Kinetics Enhancement and Thermal Effect Optimization

Studying the Selective Methylacetylene Hydrogenation Reaction in Methylacetylene–Propylene Mixtures on Palladium Oxide Nanocatalysts

Promotion of Mg(OH)2 in Cu-Based Catalysts for Selective Hydrogenation of Acetylene

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