Chemical looping combustion of high-sulfur coal with NiFe2O4-combined oxygen carrier

Wang, Baowen; Gan, Xin; Song, Xiaoyong; Zhao, Haibo; Chen, Zheng

doi:10.1007/s10973-014-4074-y

Cited by 50 publications

(30 citation statements)

References 42 publications

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“…It is desirable that OC does not react/suffer from the possible impurities, both from the fuel and OC itself. The impurities involved in an interaction with the OC material and their potential harms should be considered in the view of their practical application in energy sector [8]. It is also known that Fe-based OCs are relatively resistant to poisoning.…”

Section: Phase Composition Datamentioning

confidence: 99%

“…Furthermore, to successfully implement CLC technology, huge amounts of cheap carriers are required. CLC literature data show that in the past the development of suitable synthetic oxygen carrier materials [6][7][8] was intensive, with special attention paid to diverse preparation methods and different chemical compositions. On the other hand, nowadays increasing research interest can be observed in naturally occurring materials f or CLC purposes.…”

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confidence: 99%

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Industrial wastewater treatment wastes used as oxygen carriers in energy generation processes

Ksepko

Klimontko

Kwiecińska

2019

J Therm Anal Calorim

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The paper contains the results of a study on a promising combustion technology known as chemical looping combustion (CLC). The main advantage of CLC is the production of a highly concentrated CO 2 stream without any energy penalty for its separation, together with NO x emissions reduction. The objective of this work was to examine novel oxygen carrier (OC) materials for their practical applications with gaseous fuel/air. We report a simple, economical and environmentally friendly method for the large-scale synthesis of OCs from wastes. The reactivity tests for OCs made from wastewater from a coking plant were performed in a thermogravimetric analyser. For selected temperatures, reduction-oxidation cycles were performed. The effect of temperature on the reaction rates, the effect of waste treatment and the oxygen transport capacity were determined. The waste material demonstrated good thermal stability and maintained its redox behaviour over cycling. ICP-OES and XRD data revealed these materials that contained beneficial amounts of Fe species and silicon oxide, which improved stability. The study showed that these waste materials are excellent examples of raw materials that can enable a decrease in OC production costs with the additional benefit of the practical management of post-wastewater sediments from coke oven wastewater plants.

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Section: Phase Composition Datamentioning

confidence: 99%

mentioning

confidence: 99%

Industrial wastewater treatment wastes used as oxygen carriers in energy generation processes

Ksepko

Klimontko

Kwiecińska

2019

J Therm Anal Calorim

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“…A perovskite-type oxide has the general formula ABO 3 , where Asite present calcium, barium, strontium or various rare earth metal ion to form 12 coordination with adjacent oxygen ions, and B-site can be cobalt, iron, or other transition metal ion. Due to their variable structure and chemical composition have great interest in many applications such as fuel cells, catalysts and chemical sensors [7e10].…”

Section: Introductionmentioning

confidence: 99%

Optimize process parameters of microwave-assisted EDTA method using orthogonal experiment for novel BaCoO 3−δ perovskite

Shen

Zheng

et al. 2016

Journal of Alloys and Compounds

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“…More recently, the literature has highlighted the potential use of more complex materials, such as perovskite-type oxides [7,8], spinel-type oxides [9][10][11][12], and mixed-metal oxides [4,13,14]. However, these studies were limited.…”

Section: Introductionmentioning

confidence: 99%

Studies on the redox reaction kinetics of selected, naturally occurring oxygen carrier

Ksepko

Babiński

Evdou

et al. 2015

J Therm Anal Calorim

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This paper presents the results of a chemicallooping combustion (CLC) study. The CLC technology is believed to be one of the most promising combustion technologies. The production of a concentrated CO 2 stream that is obtained after the water condensation without any loss of energy in its separation is one of the most crucial advantages of this technology. The objective of this work was to study the kinetics of both the reduction and oxidation reactions for naturally occurring oxygen carriers that show promising reactivity in CLC reactions, and might therefore be utilized as oxygen carrier materials. Kryvbas, a Fe-based ore, was selected for this analysis because it possessed sufficient concentrations of the active metal oxides (Fe oxide above 80 % and traces of Mn oxide) and a high melting temperature that was above 1500°C. Experiments were conducted under isothermal conditions within the temperature range of 750-950°C with multiple redox cycles using a thermogravimetric analyzer (TG). For the reduction and oxidation reactions, CH 4 (at different concentrations) and air were used, respectively. The sample showed promising results where a sufficient reactivity was observed with the fuel, and these results were reproducible. Both fresh material and samples that were used in multiple redox cycles were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy combined with X-ray Microanalysis (SEM-EDS) in order to detect any structural or morphological changes as well as to determine the stability of the ore in repetitive CLC cycles. Kinetic parameters, such as the activation energy, the preexponential factor, and the reaction model, were determined for the redox reactions. Models of the redox reactions were selected by using a model fitting method. The F1 model (volumetric) was a suitable model for the modeling of the Kryvbas ore reduction reaction kinetics. The calculated E a was equal to 42.00 kJ mol -1 , while the reaction order was determined to be equal to 1.98. The best fit for the oxidation reaction was obtained for the R3 model (shrinking core model). The oxidation (regeneration) reaction activation energy was equal to 16.70 kJ mol -1 , and the reaction order was determined to be equal to approximately 0.49.

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Chemical looping combustion of high-sulfur coal with NiFe2O4-combined oxygen carrier

Cited by 50 publications

References 42 publications

Industrial wastewater treatment wastes used as oxygen carriers in energy generation processes

Industrial wastewater treatment wastes used as oxygen carriers in energy generation processes

Optimize process parameters of microwave-assisted EDTA method using orthogonal experiment for novel BaCoO 3−δ perovskite

Studies on the redox reaction kinetics of selected, naturally occurring oxygen carrier

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