Ultra-thin (~1 μm) Pd–Cu membrane reactor for coupling CO2 hydrogenation and propane dehydrogenation applications

Pati, Subhasis; Ashok, Jangam; Dewangan, Nikita; Chen, Tanjia; Kawi, Sibudjing

doi:10.1016/j.memsci.2019.117496

Cited by 67 publications

(30 citation statements)

References 46 publications

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“…Propylene is one of the most important feedstocks in the global economy for the production of various chemicals and fuels 1–4 . The worldwide increasing demand of propylene together with the increasing availability of propane from clean energy source as shale gas has spurred interest in on‐purpose production of propylene via direct dehydrogenation 5–9 .…”

Section: Introductionmentioning

confidence: 99%

PtZn intermetallic nanoalloy encapsulated in silicalite‐1 for propane dehydrogenation

Zhang

Zhai

et al. 2021

AIChE Journal

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Propane dehydrogenation (PDH) is one of the most effective methods to produce propylene. But the industrial Pt‐based catalysts often suffer from short‐term stability under the high temperature reaction environment (500–700°C) via sintering and coke deposition. Herein, stable PDH reaction in high propylene yield has been achieved by the confinement of Pt–Zn intermetallic alloys (IMAs) in the channels of silicalite‐1. Single‐site Zn in the MFI framework was found to play a key role on assisting and stabilizing the PtZn IMAs for efficient PDH. By the cooperative action of the spatial confined PtZn IMAs and the lattice confined framework Zn, high propylene selectivity (>99%) without obvious deactivation was realized on the as‐developed catalyst (PtZn@S‐1) under 600°C even after 90 h. The low deactivation constant (0.003 h−1) was 6 times lower than that of the industrial PtSn catalyst.

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Section: Introductionmentioning

confidence: 99%

PtZn intermetallic nanoalloy encapsulated in silicalite‐1 for propane dehydrogenation

Zhang

Zhai

et al. 2021

AIChE Journal

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“…One side of the hollow fiber was coated with a layer of Pd 57 Cu 43 alloy and served as both a H 2 membrane and a propane dehydrogenation catalyst, whereas the other side of the membrane was loaded with 10 % Ni/Ce x Zr 1-x O 2 , which served as a CO 2 methanation catalyst, as depicted in Figure 10a. [174] The membrane reactor achieved higher CO 2 conversion (76 %) than an equivalent fixed bed reactor ( � 72 %) at 350°C. The hydrogen consumed by the methanation reaction enhanced the flux across the membrane, giving rise to a hydrogen recovery rate of up to 75 %.…”

Section: Membrane Reactorsmentioning

confidence: 93%

“…demonstrated this concept using a bifunctional membrane reactor, fabricated from an Al 2 O 3 hollow‐fiber substrate. One side of the hollow fiber was coated with a layer of Pd 57 Cu 43 alloy and served as both a H 2 membrane and a propane dehydrogenation catalyst, whereas the other side of the membrane was loaded with 10 % Ni/Ce x Zr 1‐ x O 2 , which served as a CO 2 methanation catalyst, as depicted in Figure 10a [174] . The membrane reactor achieved higher CO 2 conversion (76 %) than an equivalent fixed bed reactor (≈72 %) at 350 °C.…”

Section: Reaction Engineering Approachesmentioning

confidence: 99%

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

et al. 2020

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Decarbonizing the chemical industry will eventually entail using CO 2 as a feedstock for chemical synthesis. However, many chemical syntheses involve CO 2 reduction using inputs such as renewable hydrogen. In this review, chemical processes are discussed that use CO 2 as an oxidant for upgrading hydrocarbon feedstocks. The captured CO 2 is inherently reduced by the hydrocarbon co-reactants without consuming molecular hydrogen or renewable electricity. This CO 2 utilization approach can be potentially applied to synthesize eight emission-intensive molecules, including olefins and epoxides. Catalytic systems and reactor concepts are discussed that can overcome practical challenges, such as thermodynamic limitations, overoxidation, coking, and heat management. Under the best-case scenario, these hydrogen-free CO 2 reduction processes have a combined CO 2 abatement potential of approximately 1 gigatons per year and avoid the consumption of 1.24 PWh renewable electricity, based on current market demand and supply.

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“…However, major concerns regarding CO 2 capture and storage lie in separation efficiency, operation costs, and long-term stability [4,5]. In comparison, transformation of cheap and abundant CO 2 to value-added products (e.g., CH 4 , CH 3 OH, C 2 -C 4 hydrocarbons) via hydrogenation has drawn tremendous attentions [1,[6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In some works, CO 2 splitting (dissociation) and reversed water-gas shift (RWGS) are considered a kind of hydrogenation process; however, a reaction involving both C-O bond breaking and C-H bond formation will be mainly covered in this review, such as methanation (Equation ( 1)) and methanol production (Equation ( 2)).…”

Section: Introductionmentioning

confidence: 99%

Dielectric Barrier Discharge Plasma-Assisted Catalytic CO2 Hydrogenation: Synergy of Catalyst and Plasma

Gao

Liang

et al. 2022

Catalysts

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CO2 hydrogenation is an effective way to convert CO2 to value-added chemicals (e.g., CH4 and CH3OH). As a thermal catalytic process, it suffers from dissatisfactory catalytic performances (low conversion/selectivity and poor stability) and high energy input. By utilizing the dielectric barrier discharge (DBD) technology, the catalyst and plasma could generate a synergy, activating the whole process in a mild condition, and enhancing the conversion efficiency of CO2 and selectivity of targeted product. In this review, a comprehensive summary of the applications of DBD plasma in catalytic CO2 hydrogenation is provided in detail. Moreover, the state-of-the-art design of the reactor and optimization of reaction parameters are discussed. Furthermore, several mechanisms based on simulations and experiments are provided. In the end, the existing challenges of this hybrid system and corresponding solutions are proposed.

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Ultra-thin (~1 μm) Pd–Cu membrane reactor for coupling CO2 hydrogenation and propane dehydrogenation applications

Cited by 67 publications

References 46 publications

PtZn intermetallic nanoalloy encapsulated in silicalite‐1 for propane dehydrogenation

PtZn intermetallic nanoalloy encapsulated in silicalite‐1 for propane dehydrogenation

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

Dielectric Barrier Discharge Plasma-Assisted Catalytic CO2 Hydrogenation: Synergy of Catalyst and Plasma

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Ultra-thin (~1 μm) Pd–Cu membrane reactor for coupling CO2 hydrogenation and propane dehydrogenation applications

Cited by 67 publications

References 46 publications

PtZn intermetallic nanoalloy encapsulated in silicalite‐1 for propane dehydrogenation

PtZn intermetallic nanoalloy encapsulated in silicalite‐1 for propane dehydrogenation

Synthesizing High‐Volume Chemicals from CO2 without Direct H2 Input

Dielectric Barrier Discharge Plasma-Assisted Catalytic CO2 Hydrogenation: Synergy of Catalyst and Plasma

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Product

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Ultra-thin (~1 μm) Pd–Cu membrane reactor for coupling CO2 hydrogenation and propane dehydrogenation applications

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input