A thermogravimetric study of CoTiO 3 as oxygen carrier for chemical looping combustion

Hwang, Jong Ha; Son, Eun Nam; Lee, Roosse; Kim, Soo Hyun; Baek, Jeom-In; Ryu, Ho Jung; Lee, Kitae; Sohn, Jung Min

doi:10.1016/j.cattod.2017.09.060

Cited by 28 publications

(19 citation statements)

References 23 publications

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“…TPR analysis of the cobalt titanate sample results in a narrow H2 consumption peak in the same temperature range (450-780 °C) as reported for perovskite-type CoTiO3 (Figure 3). 47 The profile of the calcined Co1+xAl2-xO4 sample indicates reduction within a wide temperature range when compared to the bulk-sized CoAl2O4 sample (ΔT = 350 °C vs. 120 °C; Figure S5). This reduction behaviour may suggest the reduction of an inhomogeneous phase, i.e.…”

Section: Figurementioning

confidence: 99%

Synthesis, characterisation and water–gas shift activity of nano-particulate mixed-metal (Al, Ti) cobalt oxides

et al. 2019

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Section: Figurementioning

confidence: 99%

Synthesis, characterisation and water–gas shift activity of nano-particulate mixed-metal (Al, Ti) cobalt oxides

et al. 2019

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“…Global energy demand, which resulted from the industrial revolution, has led to an increase in the consumption of fossil fuels as energy sources. 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 ).…”

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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“…In previous research works, different transition metals have been investigated as OCs, e.g., Ni 6, Cu 7, Co 8, Fe 9, and Mn 10. The activity of OCs is depending on the type of metal oxide used for the CLC process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Metal Oxide‐based Oxygen Carriers Supported with CeO₂ and γ‐Al₂O₃ for Chemical Looping Combustion

et al. 2021

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The development of efficient oxygen carriers (OCs) in chemical looping combustion (CLC) exhibited tremendous achievement considering inherent CO2 capture. The selectivity of CO2 in the CLC process depends on the performance of employed OCs during multiple redox cycles. Different types of OCs were prepared, including 5wt%Ni/5wt%Ce/γ‐Al2O3, 5wt%La/5wt%Ce/γ‐Al2O3, and 5wt%Pr/5wt%Ce/γ‐Al2O3, using the wet impregnation method and characterized by scanning electron microscopy/energy‐dispersive X‐ray spectroscopy, temperature‐programmed reduction, and thermogravimetric analysis (TGA). The redox reactivity of OCs was investigated through TGA and tubular furnace reactor. The as‐prepared OCs revealed higher thermal stability along with excellent oxygen capacity. Pr/Ce/γ‐Al2O3‐based OCs showed moderate oxygen capacity, which may increase by the addition of active metals.

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A thermogravimetric study of CoTiO 3 as oxygen carrier for chemical looping combustion

Cited by 28 publications

References 23 publications

Synthesis, characterisation and water–gas shift activity of nano-particulate mixed-metal (Al, Ti) cobalt oxides

Synthesis, characterisation and water–gas shift activity of nano-particulate mixed-metal (Al, Ti) cobalt oxides

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

Preparation of Metal Oxide‐based Oxygen Carriers Supported with CeO₂ and γ‐Al₂O₃ for Chemical Looping Combustion

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A thermogravimetric study of CoTiO 3 as oxygen carrier for chemical looping combustion

Cited by 28 publications

References 23 publications

Synthesis, characterisation and water–gas shift activity of nano-particulate mixed-metal (Al, Ti) cobalt oxides

Synthesis, characterisation and water–gas shift activity of nano-particulate mixed-metal (Al, Ti) cobalt oxides

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

Preparation of Metal Oxide‐based Oxygen Carriers Supported with CeO2 and γ‐Al2O3 for Chemical Looping Combustion

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

Preparation of Metal Oxide‐based Oxygen Carriers Supported with CeO₂ and γ‐Al₂O₃ for Chemical Looping Combustion