Numerical and experimental analysis for simulating fuel reactor in chemical looping combustor system

Ismail, Tamer M.; Ding, Lu; Ramzy, Khaled; El-Salam, M. Abd

doi:10.1007/s40789-020-00351-y

Cited by 12 publications

(5 citation statements)

References 39 publications

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“…Studies with copper ore as an oxygen carrier investigating its agglomeration behavior were summarized in a review work [8], but recently, few reports can be found using copper ore as an oxygen carrier. A reason might be the limited accessibility of copper ore since it is less available and more expensive than iron ore and manganese ore [18][19][20]. On the contrary, iron ore is more available, more abundant, high-temperature resistant, and less expensive.…”

Section: Introductionmentioning

confidence: 99%

Selecting and Testing of Cement-Bonded Magnetite and Chalcopyrite as Oxygen Carrier for Chemical-Looping Combustion

Zheng

Mei

et al. 2022

Energies

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Combining iron and copper ores can generate an oxygen carrier that has a synergic effect of high temperature resistance and high reactivity. In this work, typical cements available in the market were studied as binders to bind magnetite and chalcopyrite to develop a suitable oxygen carrier for chemical-looping combustion (CLC). A first selection step suggested that an aluminate cement, namely CA70, could favor the generation of oxygen carrier particles having good crushing strength, good particle yield, and high reactivity. The CA70-bonded oxygen carrier was then subjected to cyclic tests with CH4, CO, and H2 in reduction and in air oxidation at temperatures of 850, 900, and 950 °C with gas concentrations of 5, 10, 15, and 20% in a batch-fluidized bed reactor. The increase in temperature promoted the fuel conversion. At 950 °C, the conversions of CH4 and CO reached up to 80.4% and 99.2%, respectively. During more than 30 cycles, the oxygen carrier kept a similar reactivity to the fresh carrier and maintained its composition and physical properties. The oxygen transport capacity was maintained at 21–23%, and the phases were CuO, Fe2O3, Al2O3, and minor CaS. In the used sample, some grains were observed, but the morphology was not greatly changed. Agglomeration was absent during all the cycles, except for the deep reduction with H2.

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Section: Introductionmentioning

confidence: 99%

Selecting and Testing of Cement-Bonded Magnetite and Chalcopyrite as Oxygen Carrier for Chemical-Looping Combustion

Zheng

Mei

et al. 2022

Energies

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“…The gas phase is treated as a continuum, whose transport equations are formulated as follows , where τ g is the viscous stress tensor of the gas and S sg represents the momentum transfer between the gas and solid phases, which is formulated as follows where V c and V p, i are the volumes of the computational cell and particle i , respectively. In addition, the k –ε model is adopted to resolve the turbulence and has found extensive application in simulating full-loop CLC and other intricate systems − because of its reasonable prediction accuracy and low computational cost.…”

Section: Mathematical Modelsmentioning

confidence: 99%

Three-Dimensional Full-Loop Simulation of Gas–Solid Flow Behaviors in a Chemical Looping Gasification System with a Two-Staged Fuel Reactor

Wang,

Ku,

Lin

2024

Energy Fuels

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The structure of the fuel reactor (FR) has a considerable influence on the performance of chemical looping gasification (CLG) of solid fuels. In this work, a three-dimensional multiphase particle-in-cell method was constructed and applied to investigate the gas−solid flow behaviors in a full-loop CLG system with a novel two-staged FR. After model verification against experimental data, the flow characteristics, pressure drop, solid circulation rate, spout incoherence, and particle attrition were systematically explored under different operating conditions. The results show that increasing the FR inlet gas velocity and initial spouted bed height generally increases the pressure drop across the FR. Moreover, different parameter values noticeably influence the solid circulation rates at the FR particle outlet and the rectangular channel connecting the two fluidized beds. The spout incoherence appears in the two-staged FR during continuous operation, and increasing the initial spouted bed height decreases the dominant frequency of particle blockage. Additionally, a larger FR inlet gas velocity and initial spouted bed height or a smaller rectangular channel width intensify the particle attrition in the spouted bed of the FR and lead to a higher peak attrition rate. All of these observations and findings provide valuable guidance for the design and optimization of the two-stage FR and the full-loop CLG process.

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“…In this paper, the mixed pyrolysis incineration process of solid waste in a counter-flow rotary kiln with a processing capacity of 40 t/d was simulated using Aspen plus software (Ismail, et al 2020b), the temperature distribution and concentration distribution of various substances in the rotary kiln were simulated using Fluent software (Ismail, et al 2020a;Liu and Yang 2015;Siripaiboon, et al 2020). The factors affecting the incineration performance of counterflow rotary kilns were investigated in depth.…”

Section: Introductionmentioning

confidence: 99%

Simulation Research on 40t/d Counter-flow Rotary Kiln Incineration System

Yang¹,

Kong²,

Zeng³

et al. 2021

Preprint

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In this paper, a counter-flow rotary kiln incineration system with a processing capacity of 40 t/d of an environmental protection company in Jiangsu Province was used as the research object, and the mixed pyrolysis model and computational fluid dynamics（CFD）model of the counter-flow rotary kiln incineration system were established using Aspen plus and Fluent software. The influence of the operating temperature of the rotary kiln, the heating value of solid waste, the operating load of the rotary kiln, and the primary air volume and primary air speed on the operating effect of the rotary kiln were explored. Operating temperature, primary air volume and wind speed can all have a greater impact on the incineration performance of the counterflow rotary kiln. When the operating temperature of the counter-flow rotary kiln is greater than 800 o C, the hazardous waste heat value is not less than 1500 kcal/kg, and the primary wind speed is 1.5 m/s, the operating effect of the counter-flow rotary kiln incineration system is the best. The simulation results can provide theoretical guidance for the design and optimal operation of the counterflow rotary kiln incineration system.

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Numerical and experimental analysis for simulating fuel reactor in chemical looping combustor system

Cited by 12 publications

References 39 publications

Selecting and Testing of Cement-Bonded Magnetite and Chalcopyrite as Oxygen Carrier for Chemical-Looping Combustion

Selecting and Testing of Cement-Bonded Magnetite and Chalcopyrite as Oxygen Carrier for Chemical-Looping Combustion

Three-Dimensional Full-Loop Simulation of Gas–Solid Flow Behaviors in a Chemical Looping Gasification System with a Two-Staged Fuel Reactor

Simulation Research on 40t/d Counter-flow Rotary Kiln Incineration System

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