Chemical looping technology in CHP (combined heat and power) and CCHP (combined cooling heating and power) systems: A critical review

Rajabi, Majid; Mehrpooya, Mehdi; Zhao, Haibo; Huang, Zhen

doi:10.1016/j.apenergy.2019.113544

Cited by 61 publications

(10 citation statements)

References 144 publications

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“…For CO 2 capture from flue gas, a well-established monoethanolamine scrubbing technology could be used, however, it will increase the cost of electricity (COE) by more than 50% [15]. Chemical looping combustion (CLC) is a promising second-generation oxy-fuel combustion technique and has been highlighted as the R&D focus in the European Strategic Energy Plan (SET-Plan) [14,[16][17][18]. The CLC system mainly consists of a reducer/fuel reactor and a combustor/air reactor, between which oxygen carriers are circulated to convey both heat and oxygen.…”

Section: Chemical Looping Conceptmentioning

confidence: 99%

Chemical looping reforming: process fundamentals and oxygen carriers

et al. 2022

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Chemical looping reforming (CLR) provides a viable process intensification approach for clean and efficient syngas production from carbonaceous fuel with inherent gas–gas separation. The rational design of metal oxide-based oxygen carriers and the scale-up of associated CLR reactor systems play important roles in CLR process development. This review first introduces the concept and advantages of CLR as well as its historical development. The process fundamentals, including basic schemes, reaction stoichiometry, thermodynamics, kinetics and reactor system design, are reviewed. The integral approach for CLR process development is illustrated, showing that the design and compatibility of oxygen carriers and reactor systems are critical for CLR performance. The reaction principle during the reduction of oxygen carriers is discussed, followed by strategies for improving the redox reactivity and stability. We further review and discuss the latest exciting advances on this subject with the purpose of illustrating factors that govern fundamental mechanisms in the redox reaction chemistry of oxygen carriers and their design principles for sustained chemical looping reactor applications. It is expected that these new advances will inspire more effective oxygen carriers and efficient reactor systems for the development and deployment of various CLR processes.

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Section: Chemical Looping Conceptmentioning

confidence: 99%

Chemical looping reforming: process fundamentals and oxygen carriers

et al. 2022

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“…Although extensive research has been carried out to develop alternative, environmentally friendly energy sources, fossil fuels are still expected to play an important role, with an estimated annual increase of 1.4% on average through 2035 . Therefore, efficient and economically viable carbon dioxide capture, storage, and utilization technologies are highly desirable. − In terms of CO 2 utilization, converting CO 2 to CO, an important building block in the chemical industry, offers the opportunity to produce a variety of value-added products . However, breaking the CO bond in CO 2 is highly energy-intensive .…”

Section: Introductionmentioning

confidence: 99%

LaNi_xFe_1–xO_3−δ as a Robust Redox Catalyst for CO₂ Splitting and Methane Partial Oxidation

et al. 2021

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The current study reports LaNi0.5Fe0.5O3−δ as a robust redox catalyst for CO2 splitting and methane partial oxidation at relatively low temperatures (∼700 °C) in the context of a hybrid redox process. Specifically, perovskite-structured LaNi x Fe1–x O3−δ (LNFs) with nine different compositions (x = 0.05–0.5) were prepared and investigated. Among the samples evaluated, LaNi0.4Fe0.6O3−δ and LaNi0.5Fe0.5O3−δ showed superior redox performance, with ∼90% CO2 and methane conversions and >90% syngas selectivity. The standalone LNFs also demonstrated performance comparable to that of LNF promoted by mixed conductive Ce0.85Gd0.1Cu0.05O2−δ (CGCO). Long-term testing of LaNi0.5Fe0.5O3−δ indicated that the redox catalyst gradually loses its activity over repeated redox cycles, amounting to approximately 0.02% activity loss each cycle, averaged over 500 cycles. This gradual deactivation was found to be reversible by deep oxidation with air. Further characterizations indicated that the loss of activity resulted from a slow accumulation of iron carbide (Fe3C and Fe5C2) phases, which cannot be effectively removed during the CO2 splitting step. Reoxidation with air removed the carbide phases, increased the availability of Fe for the redox reactions via solid-state reactions with La2O3, and decreased the average crystallite size of La2O3. Reactivating the redox catalyst periodically, e.g., once every 40 cycles, was shown to be highly effective, as confirmed by operating the redox catalyst over 900 cumulative cycles while maintaining satisfactory redox performance.

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“…1 Most of the world's energy supply comes from fossil fuels (85%) such as coal, natural gas, and petroleum followed by renewable resources. 2 The consumption of fossil fuels produces greenhouse gases (GHGs), namely, carbon dioxide (CO 2 ) along with pollutants such as nitrogen oxides (NO x ) and sulfur oxides (SO x ). The significant impact of the high amount of CO 2 is the increase in the severity of global warming.…”

Section: Introductionmentioning

confidence: 99%

“…Global energy demand, which resulted from the industrial revolution, has led to an increase in the consumption of fossil fuels as energy sources . Most of the world’s energy supply comes from fossil fuels (85%) such as coal, natural gas, and petroleum followed by renewable resources . The consumption of fossil fuels produces greenhouse gases (GHGs), namely, carbon dioxide (CO 2 ) along with pollutants such as nitrogen oxides (NO x ) and sulfur oxides (SO x ).…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Ni/γ-Al₂O₃ Prepared via Ultrasonic Irradiation and Impregnation Approaches as an Oxygen Carrier in Chemical Looping Combustion

Ghazali

Aqsha

Komiyama

et al. 2021

Ind. Eng. Chem. Res.

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With the recent advancement of the chemical looping combustion (CLC) industry, the development of materials with high stability, high oxidation and reduction rate, and high oxygen transport capacity (OTC) has become a research hotspot. In this paper, the behavior of nickel oxide (NiO) as an oxygen carrier (OC) has been analyzed using thermogravimetric analysis. The influences of the preparation methods and Ni composition have been evaluated to develop Ni-based carriers with high reduction and oxidation rates over 10 redox cycles without changes in the chemical and structural properties. It has been observed that the carriers prepared by the ultrasound irradiation method showed excellent stability and higher reduction and oxidation rate (less than 1–3 min) during multiple redox cycles. However, their OTC values were lower than those of impregnated carriers. It was found that, in the ultrasound irradiation method, the 15NA (15 wt % Ni loading supported with gamma alumina) OC exhibited the highest OTC (3.17%) while 5NA (5 wt % nickel loading supported with gamma alumina) exhibited the lowest OTC (1.34%). A similar trend was observed for the impregnated OC, where 15NA exhibited the highest OTC value (3.67%), whereas 5NA exhibited the lowest OTC value (1.38%). Overall, the carriers prepared via the impregnation method possessed a high value of OTC at approximately 3.67% while the carriers prepared by ultrasound irradiation possessed an OTC value of 3.17%. In terms of physicochemical properties, the carriers prepared using the ultrasound irradiation approach possessed comparatively lower oxidation and reduction temperatures, smaller particle size, higher specific surface area, and more uniform metal distribution on the support. These findings suggested that the Ni-based OC prepared by ultrasound irradiation is a good candidate for CLC reactions.

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Chemical looping technology in CHP (combined heat and power) and CCHP (combined cooling heating and power) systems: A critical review

Cited by 61 publications

References 144 publications

Chemical looping reforming: process fundamentals and oxygen carriers

Chemical looping reforming: process fundamentals and oxygen carriers

LaNi_xFe_1–xO_3−δ as a Robust Redox Catalyst for CO₂ Splitting and Methane Partial Oxidation

Comparative Study on Ni/γ-Al₂O₃ Prepared via Ultrasonic Irradiation and Impregnation Approaches as an Oxygen Carrier in Chemical Looping Combustion

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Chemical looping technology in CHP (combined heat and power) and CCHP (combined cooling heating and power) systems: A critical review

Cited by 61 publications

References 144 publications

Chemical looping reforming: process fundamentals and oxygen carriers

Chemical looping reforming: process fundamentals and oxygen carriers

LaNixFe1–xO3−δ as a Robust Redox Catalyst for CO2 Splitting and Methane Partial Oxidation

Comparative Study on Ni/γ-Al2O3 Prepared via Ultrasonic Irradiation and Impregnation Approaches as an Oxygen Carrier in Chemical Looping Combustion

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Product

Resources

About

LaNi_xFe_1–xO_3−δ as a Robust Redox Catalyst for CO₂ Splitting and Methane Partial Oxidation

Comparative Study on Ni/γ-Al₂O₃ Prepared via Ultrasonic Irradiation and Impregnation Approaches as an Oxygen Carrier in Chemical Looping Combustion