Chemical Looping Combustion of Methane Using a Copper-based Oxygen Carrier in a 150 kW Reactor System

Langørgen, Øyvind; Saanum, Inge; Haugen, Nils Erland L.

doi:10.1016/j.egypro.2017.03.1177

Cited by 33 publications

(21 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, complete combustion was not achieved with these particles in circulating fluidized bed conditions, when maximum CH 4 conversion values of 70-80 % with solids inventory values in the 200-400 kg/MW th interval [14]. But near complete CH 4 conversion has been achieved with 120 kg/MW th in the fuel reactor when the particle size of impregnated materials was limited below 200 m [16].…”

Section: Introductionmentioning

confidence: 97%

“…These units can be classified depending on the fluid dynamic characteristics of the fuel reactor. Thus, 10 kW th CLC units located at ICB-CSIC [10,11] and IFP [12] were designed for bubbling fluidized bed conditions in the fuel reactor, while the fuel reactor in the 120 kW th unit and TUV [13][14][15] and 150 kW th unit at SINTEF [16] were circulating fluidized beds. Recently, the 120 kW th CLC unit at TUV has been modified to include a wider section in the bottom part of the reactor, but maintaining the circulation of solids in a narrow riser above the bottom bed [17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Relevance of plant design on CLC process performance using a Cu-based oxygen carrier

Abad

Gayán

Diego

et al. 2018

Fuel Processing Technology

View full text Add to dashboard Cite

Previously validated mathematical CLC models were used to simulate the process performance of CLC methane combustion using an impregnated Cu-based material and to analyse the effect of the fuel reactor design; being either a bubbling fluidized bed or a circulating fluidized bed. The CLC models considered both the fluid dynamic of the fluidized beds at the specific regime and the corresponding kinetics of oxygen carrier reduction. From the model outputs, the performance of the different systems was assessed by calculating the methane conversion in the fuel reactor. Main results highlights that the selection of a suitable particle size of the oxygen carrier and cross section area are key factors to achieve complete combustion with low solids inventory in the fuel reactor. In addition, the growing of bubbles should be limited in order to achieve high CH 4 conversion with low solids inventory values, mainly in the bubbling regime with low cross section areas. Complete combustion was predicted with solids inventory in the fuel reactor of 250 kg/MW th (1 m 2 /MW and particle size of 0.25 mm) or 125 kg/MW th (0.2 m 2 /MW and a particle size of 0.15 mm) in the bubbling and turbulent regime, respectively. Considering the pressure drop related to these conditions, conclusions for the optimization design of a CLC unit using the impregnated material are drawn based on the results of the modelling and simulation.

show abstract

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Relevance of plant design on CLC process performance using a Cu-based oxygen carrier

Abad

Gayán

Diego

et al. 2018

Fuel Processing Technology

View full text Add to dashboard Cite

show abstract

“…CO 2 treatment systems combining conversion with capture in a cost-efficient manner are particularly attractive toward commercialization. On the capture side, reduction of the cost of CO 2 separation processes could be implemented by focusing on (i) improving the efficiency of the capture materials [6,7,[68][69][70] and (ii) optimizing process design and reducing the cost of equipment [71][72][73][74][75]. In addition, considerable time and financial investments are needed in order to develop the relevant cost-effective technologies to enhance the production of chemicals, while reducing the associated costs of the used systems.…”

Section: Chemical Loopingmentioning

confidence: 99%

Perovskites in the Energy Grid and CO2 Conversion: Current Context and Future Directions

et al. 2020

View full text Add to dashboard Cite

CO2 emissions from the consumption of fossil fuels are continuously increasing, thus impacting Earth’s climate. In this context, intensive research efforts are being dedicated to develop materials that can effectively reduce CO2 levels in the atmosphere and convert CO2 into value-added chemicals and fuels, thus contributing to sustainable energy and meeting the increase in energy demand. The development of clean energy by conversion technologies is of high priority to circumvent these challenges. Among the various methods that include photoelectrochemical, high-temperature conversion, electrocatalytic, biocatalytic, and organocatalytic reactions, photocatalytic CO2 reduction has received great attention because of its potential to efficiently reduce the level of CO2 in the atmosphere by converting it into fuels and value-added chemicals. Among the reported CO2 conversion catalysts, perovskite oxides catalyze redox reactions and exhibit high catalytic activity, stability, long charge diffusion lengths, compositional flexibility, and tunable band gap and band edge. This review focuses on recent advances and future prospects in the design and performance of perovskites for CO2 conversion, particularly emphasizing on the structure of the catalysts, defect engineering and interface tuning at the nanoscale, and conversion technologies and rational approaches for enhancing CO2 transformation to value-added chemicals and chemical feedstocks.

show abstract

“…When the reactor temperatures were above 1073 K, the pilot burners, the loop seals, and lifter were shifted from air to CO 2 in order to achieve the full CLC model. After the reactor system was in full CLC mode, the fludization gas was shifted to nitrogen for the rest of the experiment . The experimental results which were used in the model validation in section were obtained by averaging 30 min when the system showed a stable performance after the fluidization gas was switched to nitrogen.…”

Section: Pilot Unitmentioning

confidence: 99%

Modeling and Simulation of Chemical Looping Combustion Using a Copper-Based Oxygen Carrier in a Double-Loop Circulating Fluidized Bed Reactor System

Zhang

Langørgen

Saanum

et al. 2017

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

In this work, a CFD simulator has been developed for a novel double loop circulating fluidized bed (DLCFB) reactor which is used for chemical looping combustion process. The simulator is implemented in an in-house code including the kinetic theory of granular flow and reaction models. Methane is used as fuel and copper oxide based particles used as oxygen carrier. The process is configured with an air reactor and a fuel reactor. The two reactors are modelled and solved by a sequential approach. The connection between the two reactors is realized through time-dependent inlet and outlet boundary conditions. The model is validated with the experimental data obtained in the current work. At a thermal input of 100 kW the methane conversion of 98 % was achieved. For the cases studied in this work, temperature is the most important factor 1 for the reactor performance, followed by the gas velocity and methane concentration of fuel. The increase of the methane concentration could decrease the methane conversion which is due to the decrease of specific inventory. As the gas velocity is increased, the residence time and the degree of gas-solid contact decreases, causing a decrease in reactor performance. Besides the effect of the single factor, the combination effect of the gas velocity and methane concentration is also important to the reactor performance.

show abstract

Chemical Looping Combustion of Methane Using a Copper-based Oxygen Carrier in a 150 kW Reactor System

Cited by 33 publications

References 9 publications

Relevance of plant design on CLC process performance using a Cu-based oxygen carrier

Relevance of plant design on CLC process performance using a Cu-based oxygen carrier

Perovskites in the Energy Grid and CO2 Conversion: Current Context and Future Directions

Modeling and Simulation of Chemical Looping Combustion Using a Copper-Based Oxygen Carrier in a Double-Loop Circulating Fluidized Bed Reactor System

Contact Info

Product

Resources

About