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Preparation of Metal Oxide‐based Oxygen Carriers Supported with CeO 2 and γ ‐Al 2 O 3 for Chemical Looping Combustion
Author(s) -
Qasim Muhammad,
Ayoub Muhammad,
Aqsha Aqsha,
Zulfiqar Muhammad
Publication year - 2021
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000438
Subject(s) - thermogravimetric analysis , chemical looping combustion , oxygen , combustion , redox , oxide , thermal stability , scanning electron microscope , metal , reactivity (psychology) , chemistry , nuclear chemistry , materials science , chemical stability , inorganic chemistry , metallurgy , organic chemistry , alternative medicine , medicine , pathology , composite material
The development of efficient oxygen carriers (OCs) in chemical looping combustion (CLC) exhibited tremendous achievement considering inherent CO 2 capture. The selectivity of CO 2 in the CLC process depends on the performance of employed OCs during multiple redox cycles. Different types of OCs were prepared, including 5wt%Ni/5wt%Ce/ γ ‐Al 2 O 3 , 5wt%La/5wt%Ce/ γ ‐Al 2 O 3 , and 5wt%Pr/5wt%Ce/ γ ‐Al 2 O 3 , using the wet impregnation method and characterized by scanning electron microscopy/energy‐dispersive X‐ray spectroscopy, temperature‐programmed reduction, and thermogravimetric analysis (TGA). The redox reactivity of OCs was investigated through TGA and tubular furnace reactor. The as‐prepared OCs revealed higher thermal stability along with excellent oxygen capacity. Pr/Ce/ γ ‐Al 2 O 3 ‐based OCs showed moderate oxygen capacity, which may increase by the addition of active metals.