In situ gasification chemical looping combustion of a coal using the binary oxygen carrier natural anhydrite ore and natural iron ore

Zheng, Mianping; Shen, Laihong; Feng, Xiaoqiong

doi:10.1016/j.enconman.2014.03.079

Cited by 47 publications

(33 citation statements)

References 42 publications

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“…One main concern with CaSO 4 CLC operation is low fuel conversions (Ding et al, 2011;Zheng et al, 2014). However many studies found that increasing the fuel reactor temperature conversions can be improved to reasonable levels (Song et al, 2008a;Zheng et al, 2014;Zhang et al, 2013). The downside to this increase in operating temperatures is that the emission of H 2 S and SO 2 gas from the OC become unavoidable.…”

Section: Natural Gypsum Oxygen Carriermentioning

confidence: 99%

“…It has been proved that CaSO 4 /CaS is an effective oxygen carrier in a CLC system (Moghtaderi, 2012). One main concern with CaSO 4 CLC operation is low fuel conversions (Ding et al, 2011;Zheng et al, 2014). However many studies found that increasing the fuel reactor temperature conversions can be improved to reasonable levels (Song et al, 2008a;Zheng et al, 2014;Zhang et al, 2013).…”

Section: Natural Gypsum Oxygen Carriermentioning

confidence: 99%

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Use of natural ores as oxygen carriers in chemical looping combustion: A review

Matzen

Pinkerton

Wang

et al. 2017

International Journal of Greenhouse Gas Control

115

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Chemical looping combustion (CLC) has gained considerable ground in energy production due to its inherent carbon capture with a minimal energy penalty. The choice of metal oxide used as an oxygen carrier (OC) in CLC has a substantial weight on the overall efficiency of energy production as well as the ultimate cost per MW. While much work has gone into manufacturing synthetic OCs with high fuel conversions, harsh operating conditions and process limitations cause some unavoidable loss of the oxygen carrier. With low production costs and minimal conditioning required, natural ores have grown in interest as cheap alternative oxygen carriers. This work provides a substantial literature review of recent works studying the use of natural ores in CLC. Iron-based, manganesebased, copper-based and calcium based ores were found to be the main ores researched, along with mixtures of these ores and natural ores with minor additional compounds. Typical parameters have been collected for each study including; fuel conversion, stability, physical characteristics, and carbon capture efficiency. Natural ores are compared with purified metal oxides to highlight strengths and weaknesses of each ore and recommendations for future studies are made.

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Section: Natural Gypsum Oxygen Carriermentioning

confidence: 99%

Section: Natural Gypsum Oxygen Carriermentioning

confidence: 99%

Use of natural ores as oxygen carriers in chemical looping combustion: A review

Matzen

Pinkerton

Wang

et al. 2017

International Journal of Greenhouse Gas Control

115

View full text Add to dashboard Cite

show abstract

“…Mei et al (2014) conducted studies and suggested that Fe 2 O 3 /Al 2 O 3 prepared by sol-gel was a highly reactive oxygen carrier for iG-CLC. The kinetic behavior and thermodynamics of the reduction of the binary oxygen carrier (CaSO 4 -Fe 2 O 3 ) by coal under steam atmosphere were investigated by Zheng et al (2014). Abada et al (2013) validated a mathematical model for a fuel reactor against experimental results obtained in a 100-kW CLC unit (using ilmenite as oxygen carrier) when reactor temperature, solid circulation flow rate, or solids inventory are varied.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of in situ gasification-chemical looping combustion (iG-CLC) of Indian coal

Suresh

Menon

Kodali

et al. 2015

Environ Sci Pollut Res

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Chemical looping combustion (CLC) is an inherent CO capture technology. It is gaining much interest in recent years mainly because of its potential in addressing climate change problems associated with CO emissions from power plants. A typical chemical looping combustion unit consists of two reactors-fuel reactor, where oxidation of fuel occurs with the help of oxygen available in the form of metal oxides and, air reactor, where the reduced metal oxides are regenerated by the inflow of air. These oxides are then sent back to the fuel reactor and the cycle continues. The product gas from the fuel reactor contains a concentrated stream of CO which can be readily stored in various forms or used for any other applications. This unique feature of inherent CO capture makes the technology more promising to combat the global climate changes. Various types of CLC units have been discussed in literature depending on the type of fuel burnt. For solid fuel combustion three main varieties of CLC units exist namely: syngas CLC, in situ gasification-CLC (iG-CLC) and chemical looping with oxygen uncoupling (CLOU). In this paper, theoretical studies on the iG-CLC unit burning Indian coal are presented. Gibbs free energy minimization technique is employed to determine the composition of flue gas and oxygen carrier of an iG-CLC unit using FeO, CuO, and mixed carrier-FeO and CuO as oxygen carriers. The effect of temperature, suitability of oxygen carriers, and oxygen carrier circulation rate on the performance of a CLC unit for Indian coal are studied and presented. These results are analyzed in order to foresee the operating conditions at which economic and smooth operation of the unit is expected.

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“…The CaSO 4 -based oxygen carrier has high reduction reactivity and stability in a longtime reduction and oxidation test (Song et al 2008b(Song et al , 2008c. However, a fraction of gas sulfides are produced during the periodic shifts between CaSO 4 reduction and CaS oxidization ( (Zheng, Shen, and Feng 2014). Besides, commercial powder and sols (Al 2 O 3 powder, Al 2 O 3 colloidal sol, ZrO 2 colloidal sol, and SiO 2 colloidal sol) as binders are applied in improving the mechanical strength of CaSO 4 oxygen carrier .…”

Section: Introductionmentioning

confidence: 99%

In Situ Gasification Chemical Looping Combustion of Coal Using the Mixed Oxygen Carrier of Natural Anhydrite Ore and Calcined Limestone

Zheng

Shen

2016

International Journal of Chemical Reactor Engineering

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The utilization of CaSO 4 -based oxygen carrier suffers the deactivation problem caused by sulphur loss. To capture the gas sulphides and to improve the stability of CaSO 4 oxygen carrier, calcined limestone was introduced into the fuel reactor of Chemical Looping Combustion (CLC). Kinetic behaviors and thermodynamics of the combined process of coal gasification and oxygen carrier reduction using the mixed oxygen carrier CaSO 4 -CaO under different atmospheres were investigated. The effects of reaction temperature, gasification intermediate, and molar ratio of CaO to CaSO 4 on gas sulphide emissions, CO 2 generation, and distribution of other gas emissions and characterization of solid products are taken into account. It is found the CaO-based additive evidently suppressed the sulphur emissions, and improved both chemical reaction rate and CO 2 generation efficiency. The sulfation products, both CaS and CaSO 4 , can be used as oxygen carrier later. The optimum reaction parameters are evaluated and obtained in terms of gas sulphide emissions, CO 2 capture, other gas releases and maintenance of oxygen transfer capability.

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In situ gasification chemical looping combustion of a coal using the binary oxygen carrier natural anhydrite ore and natural iron ore

Cited by 47 publications

References 42 publications

Use of natural ores as oxygen carriers in chemical looping combustion: A review

Use of natural ores as oxygen carriers in chemical looping combustion: A review

Thermodynamic analysis of in situ gasification-chemical looping combustion (iG-CLC) of Indian coal

In Situ Gasification Chemical Looping Combustion of Coal Using the Mixed Oxygen Carrier of Natural Anhydrite Ore and Calcined Limestone

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