Preventing Agglomeration of CuO-Based Oxygen Carriers for Chemical Looping Applications
نویسندگان
چکیده
Chemical looping combustion (CLC) is a promising alternative to the conventional combustion-based, fossil fuel conversion processes. In CLC, solid oxygen carrier used transfer from air carbonaceous fuel. This indirect route allows for effective CO2 capture because sequestrable stream of inherently produced without any need energy-intensive separation. From thermodynamic point view, CuO arguably one most candidates CLC. However, main challenge associated with use CLC its structural instability at typical operating temperatures chemical processes, leading severe thermal sintering and agglomeration. To minimize irreversible microstructural changes during operation, commonly stabilized by high Tammann temperature ceramic, example, Al2O3, MgAl2O4, so forth. it has been observed that support does not always provide resistance work aims identifying descriptors can be characterize accurately agglomeration tendency CuO-based carriers. carriers supported on different metal oxides were synthesized using Pechini method. The cyclic redox stability materials evaluated both thermo-gravimetric analyzer lab-scale fluidized bed reactor 900 °C 10 vol % H2 in N2 as re-oxidation. order study diffusion Cu(O) reactions, well-defined model surfaces comprising thin films Cu/CuO two supports, namely, ZrO2 MgO, prepared via magnetron sputtering. Energy-dispersive X-ray spectroscopy focused ion beam-cut cross-sections revealed Cu atoms have diffuse outward through material under conditions. inhibits movement Cu(O), is, avoiding presence low melting surface, found highest resistance. MgO was possess such characteristics.
منابع مشابه
Effect of support on reactivity and selectivity of Ni- based oxygen carriers for Chemical-Looping Combustion
Different Ni-based oxygen carriers were prepared by dry impregnation using -Al2O3 as support. The reactivity, selectivity during methane combustion, attrition rate and agglomeration behaviour of the oxygen carriers were measured and analyzed in a termogravimetric analyzer and in a batch fluidized bed during multicycle reductionoxidation tests. * Manuscript
متن کاملCharacterization of a Sol-gel Derived CuO/CuAl2O4 Oxygen Carrier for Chemical Looping Combustion (CLC) and Chemical Looping with Oxygen Uncoupling (CLOU) of Gaseous Fuels
متن کامل
Effect of gas composition in Chemical-Looping Combustion with copper based oxygen carriers: Fate of sulphur
Chemical-Looping Combustion (CLC) is an emerging technology for CO2 capture because separation of this gas from the other flue gas components is inherent to the process and thus no energy is expended for the separation. Natural or refinery gas can
متن کاملSolid waste management of a chemical-looping combustion plant using Cu-based oxygen carriers.
Waste management generated from a Chemical-Looping Combustion (CLC) plant using copper-based materials is analyzed by two ways: the recovery and recycling of the used material and the disposal of the waste. A copper recovery process coupled to the CLC plant is proposed to avoid the loss of active material generated by elutriation from the system. Solid residues obtained from a 10 kWth CLC proto...
متن کاملOptimization of Hydrogen Production by Chemical-Looping Auto- Thermal Reforming Working with Ni-based Oxygen-Carriers
Chemical-Looping auto-thermal Reforming (CLRa) is a new process for hydrogen production from natural gas that uses the same principles as Chemical-Looping Combustion (CLC). The main difference with CLC is that the desired product is syngas (H2 + CO) instead of CO2 + H2O. For that, in the CLRa process the air to fuel ratio is kept low to prevent the complete oxidation of the fuel. The major adva...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ACS Sustainable Chemistry & Engineering
سال: 2021
ISSN: ['2168-0485']
DOI: https://doi.org/10.1021/acssuschemeng.1c00560