The role of heat transfer on the feasibility of a packed-bed membrane reactor for propane dehydrogenation

Dittrich, Christoph

doi:10.1016/j.cej.2019.122492

Cited by 19 publications

(8 citation statements)

References 42 publications

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“…[180] The analysis by Dittrich suggests that heat supply is the rate-limiting factor for propane dehydrogenation in commercial-scale membrane reactors. [181] To address the heat demand by alkane dehydrogenation, Brune et al proposed a hybrid system, in which endothermic dehydrogenation reactions and the exothermic O 2 -ODH reactions are conducted on different sides of a membrane, to make the overall process thermal-neutral. [182]…”

Section: àmentioning

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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Section: àmentioning

confidence: 99%

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

et al. 2020

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“…2,3,7 The selective removal of H 2 molecules, for instance in membrane reactors, can significantly enhance the equilibrium conversion and improve the efficiency of the downstream separation section of PDH processes. 8,9 The residual hydrogen can further be combusted to heat the dehydrogenation reactor, potentially eliminating the need for an additional fuel source. 10 Moreover, the design and discovery of active and stable catalysts play a key role in reducing the energy required in PDH processes.…”

Section: Introductionmentioning

confidence: 99%

Multiscale modeling reveals aluminum nitride as an efficient propane dehydrogenation catalyst

Abdelgaid

Miu

Xuan

et al. 2023

Catal. Sci. Technol.

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“…In this context, the NIPHD model is able to predict the main characteristics of the SRM method’s dynamic performance in PBMR [ 17 ]. In addition, the system of NPDEs represents a strong tool for facilitating the project, optimization, and PBMR reformer’s control [ 3 , 18 , 19 , 20 ]. The numerical solution of the system of NPDEs has been a great challenge due to the numerical stability.…”

Section: Introductionmentioning

confidence: 99%

Thermochemical Performance Analysis of the Steam Reforming of Methane in a Fixed Bed Membrane Reformer: A Modelling and Simulation Study

Medeiros¹,

Dias²,

Silva³

et al. 2020

Membranes

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Pd-based membrane reformers have been substantially studied in the past as a promising reformer to produce high-purity H2 from thermochemical conversion of methane (CH4). A variety of research approaches have been taken in the experimental and theoretical fields. The main objective of this work is a theoretical modelling to describe the process variables of the Steam Reforming of Methane (SRM) method on the Pd-based membrane reformer. These process variables describe the specific aims of each equation of the mathematical model characterizing the performance from reformer. The simulated results of the mole fractions of components (MFCs) at the outlet of the Fixed Bed Reformer (FBR) and Packed-Bed Membrane Reformer (PBMR) have been validated. When the H2O/CH4 ratio decreases in PBMR, the Endothermic Reaction Temperature (ERT) is notably increased (998.32 K) at the outlet of the PBMR’s reaction zone. On the other hand, when the H2O/CH4 ratio increases in PBMR, the ERT is remarkably decreased (827.83 K) at the outlet of the PBMR’s reaction zone. An increase of the spatial velocity (Ssp) indicates a reduction in the residence time of reactant molecules inside PBMR and, thus, a decrease of the ERT and conversion of CH4. In contrast, a reduction of the Ssp shows an increase of the residence time of reactant molecules within PBMR and, therefore, a rise of the ERT and conversion of CH4. An increase of the H2O/CH4 ratio raises the conversion rate (CR) of CH4 due to the reduction of the coke content on the catalyst particles. Conversely, a reduction of the H2O/CH4 ratio decreases the CR of CH4 owing to the increase of the coke content on the catalyst particles. Contrary to the CR of CH4, the consumption-based yield (CBY) of H2 sharply decreases with the increase of the H2O/CH4 ratio. An increase of the ERT raises the thermochemical energy storage efficiency (ηtese) from 68.96% (ERT = 1023 K), 63.21% (ERT = 973 K), and 48.12% (ERT = 723 K). The chemical energy, sensible heat, and heat loss reached values of 384.96 W, 151.68 W, and 249.73 W at 973 K. The selectivity of H2 presents higher amounts in the gaseous mixture that varies from 60.98 to 73.18 while CH4 showed lower values ranging from 1.41 to 2.06. Our work is limited to the SRM method. In terms of future uses of this method, new works can be undertaken using novel materials (open-cell foams) and the physical-mathematical model (two-dimensional and three-dimensional) to evaluate the concentration polarization inside membrane reactors.

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The role of heat transfer on the feasibility of a packed-bed membrane reactor for propane dehydrogenation

Cited by 19 publications

References 42 publications

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

Multiscale modeling reveals aluminum nitride as an efficient propane dehydrogenation catalyst

Thermochemical Performance Analysis of the Steam Reforming of Methane in a Fixed Bed Membrane Reformer: A Modelling and Simulation Study

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The role of heat transfer on the feasibility of a packed-bed membrane reactor for propane dehydrogenation

Cited by 19 publications

References 42 publications

Synthesizing High‐Volume Chemicals from CO2 without Direct H2 Input

Synthesizing High‐Volume Chemicals from CO2 without Direct H2 Input

Multiscale modeling reveals aluminum nitride as an efficient propane dehydrogenation catalyst

Thermochemical Performance Analysis of the Steam Reforming of Methane in a Fixed Bed Membrane Reformer: A Modelling and Simulation Study

Contact Info

Product

Resources

About

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input

Synthesizing High‐Volume Chemicals from CO₂ without Direct H₂ Input