Preparation of Novel Oxygen Carriers Supported by Ti, Zr-Shelled γ-Alumina for Chemical Looping Combustion of Methane
Artikel i vetenskaplig tidskrift, 2020

Highly stabilized mesoporous core-shell-structured oxygen carriers (OCs) were fabricated by a repetitive coating process of alumina supports using the mesopore-forming surfactant assembly method. The wet coating strategy, along with the sol-gel process, was used for the synthesis of mesoporous material-shelled OCs with various shell compositions (i.e., zirconia, titania). The cyclic performance of the synthesized OCs during chemical looping combustion (CLC) was investigated in a thermogravimetric analyzer (TGA). The mesoporous-shelled OCs demonstrated significantly better performance compared to the OCs without mesoporous shells. The synthesized OCs with a mesoporous zirconia/titania shell reveal a unique oxygen capacity of 100% based on active metal oxide for supported NiO and Fe2O3. Also, the synthesized OCs showed no activity loss after 10 cycles. This was attributed to the exceptional core-shell coating strategy, in which the thermally stable mesoporous Zr/Ti layers prevent the sintering and over-reaction of the active metal oxide crystals with the alumina support.

Författare

Davood Karami

University of Calgary

Amir H Soleimani Salim

Chalmers, Rymd-, geo- och miljövetenskap, Energiteknik, Energiteknik 2

University of Calgary

Mohammad Hashem Sedghkerdar

Persian Gulf University

Nader Mahinpey

University of Calgary

Industrial & Engineering Chemistry Research

0888-5885 (ISSN) 1520-5045 (eISSN)

Vol. 59 7 3221-3228

Ämneskategorier

Oorganisk kemi

Materialkemi

DOI

10.1021/acs.iecr.9b06832

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Senast uppdaterat

2020-03-18