Hydrogen production with integrated CO 2  capture in a novel gas switching reforming reactor: Proof-of-concept

Wassie, SA Solomon; Gallucci, Fausto; Zaabout, Abdelghafour; Cloete, Schalk; Amini, Shahriar; Annaland, Martin van Sint

doi:10.1016/j.ijhydene.2017.04.227

Cited by 48 publications

(18 citation statements)

References 23 publications

(30 reference statements)

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“…Here, we show a disruptive approach to a fundamental process by integrating an electrically heated catalytic structure directly into a steam-methane reforming (SMR) reactor for hydrogen production. Intimate 15 contact between the electric heat source and the reaction site drives the reaction close to thermal equilibrium, increases catalyst utilization, and limits unwanted byproduct formation. The integrated design with small characteristic length scales allows compact reactor designs, potentially 100 times smaller than current reformer platforms.…”

Section: Title: Electrified Methane Reforming -A Compact Approach To mentioning

confidence: 99%

“…1A), and typically less than 2% of the furnace volume contains catalyst (5,8). Intrinsic catalytic activity is 15 typically not a limiting factor for industrial reforming (9). Instead, the low thermal conductivity combined with a strongly endothermic reaction creates steep temperature gradients across the catalyst, leading to poor catalyst utilization and increasing risk of detrimental carbon formation (10-12).…”

Section: Title: Electrified Methane Reforming -A Compact Approach To mentioning

confidence: 99%

“…There is no discernible temperature gradient across the reactor wall, a significant benefit compared with a fired reformer where the temperature difference between the inner and outer wall of the 15 tubular reactor can cause thermal stress, critical to mechanical strength and reactor lifetime (27).…”

Section: Fig 2 Lab-scale Resistance-heated Reformermentioning

confidence: 99%

“…A significant benefit of the resistance-heated design is the possibility for exceptionally compact 15 reactors (23). If we use the model developed in this work, for a single tube and extrapolate it to several parallel reformer tubes matching the capacity of an SMR, we find that a conventional 1100 m 3 side-fired reformer producing 2230 kmol H2/h can be replaced with a ca.…”

Section: Fig 2 Lab-scale Resistance-heated Reformermentioning

confidence: 99%

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Electrified methane reforming: A compact approach to greener industrial hydrogen production

Wismann

Engbæk

Vendelbo

et al. 2019

Science

362

237

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Electrification of conventionally fired chemical reactors has the potential to reduce CO2 emissions and provide flexible and compact heat generation. Here, we describe a disruptive approach to a fundamental process by integrating an electrically heated catalytic structure directly into a steam-methane–reforming (SMR) reactor for hydrogen production. Intimate contact between the electric heat source and the reaction site drives the reaction close to thermal equilibrium, increases catalyst utilization, and limits unwanted byproduct formation. The integrated design with small characteristic length scales allows compact reactor designs, potentially 100 times smaller than current reformer platforms. Electrification of SMR offers a strong platform for new reactor design, scale, and implementation opportunities. Implemented on a global scale, this could correspond to a reduction of nearly 1% of all CO2 emissions.

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Section: Title: Electrified Methane Reforming -A Compact Approach To mentioning

confidence: 99%

Section: Title: Electrified Methane Reforming -A Compact Approach To mentioning

confidence: 99%

Section: Fig 2 Lab-scale Resistance-heated Reformermentioning

confidence: 99%

Section: Fig 2 Lab-scale Resistance-heated Reformermentioning

confidence: 99%

See 2 more Smart Citations

Electrified methane reforming: A compact approach to greener industrial hydrogen production

Wismann

Engbæk

Vendelbo

et al. 2019

Science

362

237

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“…The process configuration incorporating the PBCLR reactors will be similar to the gas switching reforming (GSR) reactor concept previously investigated by the authors [16,17], with the main difference being the use of packed beds instead of fluidized beds. As in the GSR concept, a cluster of several dynamically operated PBCLR reactors will be required to create a steady state process unit.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Modeling of a Packed Bed Chemical Looping Reforming (PBCLR) Reactor

et al. 2017

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Packed bed reactors are broadly used in industry and are under consideration for novel reactor concepts such as packed bed chemical looping reforming (PBCLR). Mass and heat transfer limitations in and around the particles in packed bed reactors strongly affect the behavior of these units. This study employs a multiscale modeling methodology to simulate a PBCLR reactor. Specifically, small-scale particle-resolved direct numerical simulation is utilized to improve large-scale mass transfer models for use in an industrial scale 1D model. Existing intra-particle mass transfer models perform well for simple first order reactions, but several model enhancements were required to model the more complex steam methane reforming reaction system. Three specific aspects required enhanced modeling: the generation of additional gas volume by the reforming reactions, the lack of clear reaction orders in the equilibrium reactions, and the diffusion of multiple reactant species into the particle. Large-scale simulations of the PBCLR reactor with the enhanced 1D model showed that the highly reactive Ni-based catalyst/oxygen carrier employed allows for the use of large particle sizes and high gas flowrates, offering potential for process intensification.

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Effect of CO₂ adsorbents on the Ni‐based dual‐function materials for CO₂ capturing and in situ methanation

Chai

Leong

Wong

et al. 2020

J Chinese Chemical Soc

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The present work studied the effect of different carbon dioxide (CO2) adsorbents on Ni‐based dual‐function materials (DFMs) for the development of carbon capture and on‐site utilization in a reactor at isothermal condition. The DFMs containing Ni functioning as a methanation catalyst with various CO2 adsorbents (i.e., CaO, MgO, K2CO3, or Na2CO3) were prepared on γ‐Al2O3 through sequential impregnation. The result indicated that Ni‐Na2CO3/γ‐Al2O3 had the highest methanation capacity (i.e., 0.1783 mmol/g) and efficiency (i.e., 71.09%) in the CO2 adsorption–methanation test. The CO2 uptake and the subsequent methanation capacity of the Ni‐Na2CO3/γ‐Al2O3 increased to more than 24 times and more than 17 times, respectively, compared to Ni/γ‐Al2O3. The high methanation capacity was correlated to its highest amount of weak basic sites, substantial CO2 capture capacity and capture/release efficiency, and reactivity to H2 at a lower temperature, supported by CO2‐TPD, TGA analyses for adsorption or adsorption–desorption at the isothermal condition, and H2‐TPRea, respectively. A continuous cyclic CO2 adsorption–methanation was performed by using the Ni‐Na2CO3/γ‐Al2O3 and Ni‐CaO/γ‐Al2O3, showing that the CO2 adsorption capacity was stabilized from third cycle onward, whereas the methanation capacity was stabilized at all cycles, indicating the high stability of the DFMs for both CO2 adsorption and subsequent methanation. This work demonstrated successful synthesis of the Ni‐based, low‐cost, and stable DFMs with the ability to produce methane via the direct capture of CO2.

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Hydrogen production with integrated CO 2 capture in a novel gas switching reforming reactor: Proof-of-concept

Cited by 48 publications

References 23 publications

Electrified methane reforming: A compact approach to greener industrial hydrogen production

Electrified methane reforming: A compact approach to greener industrial hydrogen production

Multiscale Modeling of a Packed Bed Chemical Looping Reforming (PBCLR) Reactor

Effect of CO₂ adsorbents on the Ni‐based dual‐function materials for CO₂ capturing and in situ methanation

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Hydrogen production with integrated CO 2 capture in a novel gas switching reforming reactor: Proof-of-concept

Cited by 48 publications

References 23 publications

Electrified methane reforming: A compact approach to greener industrial hydrogen production

Electrified methane reforming: A compact approach to greener industrial hydrogen production

Multiscale Modeling of a Packed Bed Chemical Looping Reforming (PBCLR) Reactor

Effect of CO2 adsorbents on the Ni‐based dual‐function materials for CO2 capturing and in situ methanation

Contact Info

Product

Resources

About

Effect of CO₂ adsorbents on the Ni‐based dual‐function materials for CO₂ capturing and in situ methanation