Process Intensification via Membrane Reactors, the DEMCAMER Project

Gallucci, Fausto; Medrano, J.A.; Roses, Leonardo; Brunetti, Adele; Barbieri, Giuseppe; Viviente, J.L.

doi:10.3390/pr4020016

Cited by 14 publications

(8 citation statements)

References 38 publications

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“…In their report for the DEMCAMER project, Gallucci et al 79 studied MIEC stability from a mechanical perspective. They attempted to create a prototype for an OCM membrane reactor consisting of Mn−Na−W/SiO 2 catalyst packed inside a hollow fiber BaCo x Fe y Zr z O 3-δ dense membrane and scale it up to a system consisting of 20 membrane achieved a methane conversion of 55% with a C 2 yield of 22%.…”

Section: Comparison Of Ocm Operation Modes (Co-feed Vs Distributed Fe...mentioning

confidence: 99%

“…The employment of oxygen membranes has a number of advantages. For example, it intensifies the process for both air separation and OCM reaction being conducted in a single unit and consequently simplifies upstream processing . It also aids to conduct OCM reaction in a much safer environment, where methane and oxygen gas phase reactions are eliminated .…”

Section: Technology Status and Challengesmentioning

confidence: 99%

“…For example, it intensifies the process for both air separation and OCM reaction being conducted in a single unit and consequently simplifies upstream processing. 79 It also aids to conduct OCM reaction in a much safer environment, where methane and oxygen gas phase reactions are eliminated. 80 This configuration also helps achieve higher conversion by allowing feeding oxygen in a safe manner.…”

Section: ■ Introductionmentioning

confidence: 99%

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Divide to Conquer: On the Use of Distributed Feed Strategies in Oxidative Coupling of Methane

Alahmadi,

Bavykina,

Morlanes

et al. 2023

Ind. Eng. Chem. Res.

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The oxidative coupling of methane (OCM) represents a promising method for the direct conversion of methane into ethylene, the most highly sought-after olefin in the petrochemical market. Nevertheless, the adoption of the OCM in industrial applications has been hampered by inherent chemical and engineering challenges. As a result, research endeavors have been directed toward developing innovative strategies to enhance the performance of the OCM process. This review offers a comprehensive overview of the challenges faced by the OCM, which has led to research exploring the use of a distributed feed policy. In this approach, methane and oxygen (the reactants for the OCM) are introduced separately, either through multiple oxygen injection points in the case of packed-bed reactors or into two distinct compartments in the case of membrane reactors. Additionally, we present an overview of the various types of membranes utilized in this context. More particularly, we focus on the use of mixed-ionic-electronic-conducting (MIEC) membranes to address the challenges of OCM. Due to their unique ionic conductive properties, MIEC membranes help to increase the overall efficiency of the OCM process. For example, an MIEC membrane intensifies the process for both air separation and the OCM reaction being conducted in a single unit, consequently simplifying upstream processing. It also aids in conducting the OCM reaction in a much safer environment, where gas-phase reactions of methane and oxygen are eliminated. With oxygen being a limited reactant in the OCM, this configuration also helps achieve higher methane conversion by allowing the safe feeding of more oxygen. Additionally, higher selectivity can be achieved by suppressing gas-phase reactions. In this case, oxygen is directly available in the catalyst zone. Finally, this review investigates the chemical and mechanical stability of MIEC membranes for OCM applications, and we conclude with important remarks and outlooks.

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Section: Comparison Of Ocm Operation Modes (Co-feed Vs Distributed Fe...mentioning

confidence: 99%

Section: Technology Status and Challengesmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Divide to Conquer: On the Use of Distributed Feed Strategies in Oxidative Coupling of Methane

Alahmadi,

Bavykina,

Morlanes

et al. 2023

Ind. Eng. Chem. Res.

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“…Thus, process intensification is needed to overcome some disadvantages of the established plant designs and can lead to a more sustainable and energy effective overall process [9]. Numerous research activities in the field of process intensification are related to membrane reactors [10,11]. Membrane reactors can provide distribution or extraction of intermediates, reactants, or products to assure a more advantages concentration and temperature regime than conventional reactor designs [12].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Model-Based Description of the Total Process of Periodic Deactivation and Regeneration of a VOx Catalyst for Selective Dehydrogenation of Propane

2020

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This study intends to provide insights into various aspects related to the reaction kinetics of the VOx catalyzed propane dehydrogenation including main and side reactions and, in particular, catalyst deactivation and regeneration, which can be hardly found in combination in current literature. To kinetically describe the complex reaction network, a reduced model was fitted to lab scale experiments performed in a fixed bed reactor. Additionally, thermogravimetric analysis (TGA) was applied to investigate the coking behavior of the catalyst under defined conditions considering propane and propene as precursors for coke formation. Propene was identified to be the main coke precursor, which agrees with results of experiments using a segmented fixed bed reactor (FBR). A mechanistic multilayer-monolayer coke growth model was developed to mathematically describe the catalyst coking. Samples from long-term deactivation experiments in an FBR were used for regeneration experiments with oxygen to gasify the coke deposits in a TGA. A power law approach was able to describe the regeneration behavior well. Finally, the results of periodic experiments consisting of several deactivation and regeneration cycles verified the long-term stability of the catalyst and confirmed the validity of the derived and parametrized kinetic models for deactivation and regeneration, which will allow model-based process development and optimization.

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“…Among the different membrane reactors reported in the scientific literature [1,2,3], the palladium-based ones are the most commonly used when hydrogen is the product to be separated [4,5,6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Application of Pd-Based Membrane Reactors: An Industrial Perspective

Palo¹,

Salladini

Morico

et al. 2018

Membranes

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The development of a chemical industry characterized by resource efficiency, in particular with reference to energy use, is becoming a major issue and driver for the achievement of a sustainable chemical production. From an industrial point of view, several application areas, where energy saving and CO2 emissions still represent a major concern, can take benefit from the application of membrane reactors. On this basis, different markets for membrane reactors are analyzed in this paper, and their technical feasibility is verified by proper experimentation at pilot level relevant to the following processes: (i) pure hydrogen production; (ii) synthetic fuels production; (iii) chemicals production. The main outcomes of operations in the selected research lines are reported and discussed, together with the key obstacles to overcome.

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Process Intensification via Membrane Reactors, the DEMCAMER Project

Cited by 14 publications

References 38 publications

Divide to Conquer: On the Use of Distributed Feed Strategies in Oxidative Coupling of Methane

Divide to Conquer: On the Use of Distributed Feed Strategies in Oxidative Coupling of Methane

Analysis and Model-Based Description of the Total Process of Periodic Deactivation and Regeneration of a VOx Catalyst for Selective Dehydrogenation of Propane

Application of Pd-Based Membrane Reactors: An Industrial Perspective

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