Robocasting of 3D printed and sintered ceria scaffold structures with hierarchical porosity for solar thermochemical fuel production from the splitting of CO<sub>2</sub>

Ben–Arfa, Basam A.E.; Abanades, Stéphane; Salvado, Isabel M. Miranda; Ferreira, J.M.F.; Pullar, Robert C.

doi:10.1039/d2nr00393g

Cited by 13 publications

(5 citation statements)

References 38 publications

(54 reference statements)

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“…All the pastes elucidate a characteristic aspect of shear thinning behavior confirmed by an exponential decline of the viscosity at increasing shear rate from even low values (<10 s –1 ). The shear-thinning behavior is a key requirement in the automatized fabrication process, particularly robocasting where the pastes located in very small orifices are subjected to high shear stresses. , Further, it provides an overview on paste flowability response whether it is steady or irregular at different share rate values. The viscosity marked higher values in all the pastes compared to the standalone gelling agent solution of PCNF + PEI (∼40 Pa s for zeolite@P and ZIF-67@P, 90 Pa s for ZIF-8@P).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO₂ Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Lamnini,

Boukayouht,

Ouzrour

et al. 2024

Langmuir

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This study involves the synthesis and comparison of zeolitic imidazolate frameworks (ZIFs), specifically ZIF-8 and ZIF-67 pristine with a commercial zeolite, emphasizing their CO 2 affinity and sorption capability. To overcome challenges persisting in the handling and integration of these materials into industrial adsorption processes, particularly when limited to microcrystalline fine powders, we present herein an innovative manufacturing method to produce standalone monolithic supports. This process involves pseudoplastic paste formulations utilizing polyethylenimine (PEI) as a coagulant and locally fabricated phosphorylated cellulose nanofiber (PCNF) as a binding agent. Rheological investigation was conducted to anticipate the required shaping and design by means of paste flowability, consistency, and stiffness. XRD and FTIR results confirm the preservation of crystalline structure and the occurrence of amine functionalization associated with the presence of PEI, respectively. The proposed method significantly enhances the CO 2 adsorption performance of the produced ZIF-8 monolith in comparison with that reached when using the pristine material, achieving a capacity of 1.25−2 mmol• g −1 at 30 °C under dry conditions in a pressure range of 1−13 bar, respectively. In other words, this work clearly highlights an effective applicability of the ZIF-8 monolith as an innovative sorbent for further designing CO 2 capture industrial setups.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO₂ Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Lamnini,

Boukayouht,

Ouzrour

et al. 2024

Langmuir

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“…The hierarchically ordered channeled structures were manufactured by the DIW technique, [13][14][15][16] where a ceria-based paste (ink) is extruded in layers at room temperature. DIW of large, crackfree structures require colloidal pastes with a high concentration of particles to minimize shrinkage [17,18] and tailored rheological properties to enable proper extrusion and bonding between printed layers while preventing shape distortion.…”

Section: Three-dimensional Printing By Direct Ink Writingmentioning

confidence: 99%

Solar‐Driven Redox Splitting of CO₂ Using 3D‐Printed Hierarchically Channeled Ceria Structures

Sas Brunser,

Bargardi,

Libanori

et al. 2023

Adv Materials Inter

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Fuel produced from CO2 and H2O using solar energy can contribute to making aviation more sustainable. Particularly attractive is the thermochemical production pathway via a ceria‐based redox cycle, which uses the entire solar spectrum as the source of high‐temperature process heat to directly produce a syngas mixture suitable for synthetizing kerosene. However, its solar‐to‐fuel energy efficiency is hindered by the inadequate isotropic topology of the ceria porous structure, which fails to absorb the incident concentrated solar radiation within its entire volume. This study presents the design and 3D‐print of hierarchically channeled structures of pure ceria by direct ink writing (DIW) to enable volumetric radiative absorption while maintaining high effective densities required for maximizing the fuel yield. The complex interplay between radiative heat transfer and thermochemical reaction is investigated in a solar thermogravimetric analyzer with samples exposed to high‐flux irradiation, mimicking realistic operation of solar reactors. Channeled structures with a stepwise optical thickness achieve a higher and more uniform temperature profile compared to that of state‐of‐art isotropic structures, doubling the volume‐specific fuel yield for the same solar flux input. Thermomechanical stability of the ceria graded structures, DIW‐printed using a novel ink formulation with optimal rheological behavior, is validated by performing 100 consecutive redox cycles.

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“…Mn-doped ceria was synthesized and then coated on MPSZ ceramic foam at 30% mass for solar testing in thermochemical cycles [119], showing an improved O 2 and H 2 release compared to pristine ceria coated on ceramic foam, despite a strong deactivation after several cycles and the low stability of the material. Ordered ceria structures prepared by the replication of optimized scaffolds obtained from additive manufacturing or robocasting were considered [120]. The design of hierarchically ordered structures with porosity gradient was performed [121] for higher radiation penetration compared to reticulated structures with uniform porosity.…”

Section: Ceria-based Cyclesmentioning

confidence: 99%

A Review of Oxygen Carrier Materials and Related Thermochemical Redox Processes for Concentrating Solar Thermal Applications

Abanades

2023

Materials

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Redox materials have been investigated for various thermochemical processing applications including solar fuel production (hydrogen, syngas), ammonia synthesis, thermochemical energy storage, and air separation/oxygen pumping, while involving concentrated solar energy as the high-temperature process heat source for solid–gas reactions. Accordingly, these materials can be processed in two-step redox cycles for thermochemical fuel production from H2O and CO2 splitting. In such cycles, the metal oxide is first thermally reduced when heated under concentrated solar energy. Then, the reduced material is re-oxidized with either H2O or CO2 to produce H2 or CO. The mixture forms syngas that can be used for the synthesis of various hydrocarbon fuels. An alternative process involves redox systems of metal oxides/nitrides for ammonia synthesis from N2 and H2O based on chemical looping cycles. A metal nitride reacts with steam to form ammonia and the corresponding metal oxide. The latter is then recycled in a nitridation reaction with N2 and a reducer. In another process, redox systems can be processed in reversible endothermal/exothermal reactions for solar thermochemical energy storage at high temperature. The reduction corresponds to the heat charge while the reverse oxidation with air leads to the heat discharge for supplying process heat to a downstream process. Similar reversible redox reactions can finally be used for oxygen separation from air, which results in separate flows of O2 and N2 that can be both valorized, or thermochemical oxygen pumping to absorb residual oxygen. This review deals with the different redox materials involving stoichiometric or non-stoichiometric materials applied to solar fuel production (H2, syngas, ammonia), thermochemical energy storage, and thermochemical air separation or gas purification. The most relevant chemical looping reactions and the best performing materials acting as the oxygen carriers are identified and described, as well as the chemical reactors suitable for solar energy absorption, conversion, and storage.

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Robocasting of 3D printed and sintered ceria scaffold structures with hierarchical porosity for solar thermochemical fuel production from the splitting of CO₂

Abstract: We report the first ever robocast (additive manufacturing / 3D printing) sintered ceria scaffolds, and explore their use for the production of renewable fuels via solar thermochemical fuel production (STFP,...

Cited by 13 publications

References 38 publications

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO₂ Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO₂ Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Solar‐Driven Redox Splitting of CO₂ Using 3D‐Printed Hierarchically Channeled Ceria Structures

A Review of Oxygen Carrier Materials and Related Thermochemical Redox Processes for Concentrating Solar Thermal Applications

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Robocasting of 3D printed and sintered ceria scaffold structures with hierarchical porosity for solar thermochemical fuel production from the splitting of CO2

Abstract: We report the first ever robocast (additive manufacturing / 3D printing) sintered ceria scaffolds, and explore their use for the production of renewable fuels via solar thermochemical fuel production (STFP,...

Cited by 13 publications

References 38 publications

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO2 Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO2 Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Solar‐Driven Redox Splitting of CO2 Using 3D‐Printed Hierarchically Channeled Ceria Structures

A Review of Oxygen Carrier Materials and Related Thermochemical Redox Processes for Concentrating Solar Thermal Applications

Contact Info

Product

Resources

About

Robocasting of 3D printed and sintered ceria scaffold structures with hierarchical porosity for solar thermochemical fuel production from the splitting of CO₂

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO₂ Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Fabrication of Highly Efficient ZIF-8@PEI Monoliths for CO₂ Capture Using Phosphorylated Cellulose Nanofiber as a Binder

Solar‐Driven Redox Splitting of CO₂ Using 3D‐Printed Hierarchically Channeled Ceria Structures