Cu–Fe–Al–O mixed spinel oxides as oxygen carrier for chemical looping hydrogen generation. (17th April 2020)

• Record Type: Journal Article
• Authors: Cui, Dongxu; Qiu, Yu; Li, Min; Ma, Li; Zhang, Shuai; Zeng, Dewang; Xiao, Rui
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 21(2020)
• Page Start: 11908
• Page End: 11915
• Publication Date: 2020-04-17
• Subjects: Chemical looping -- Redox stability -- Hydrogen yield -- Sintering; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.02.145
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The reduction level for a metal oxides carrier determines the final hydrogen yield for a chemical looping hydrogen generation process. Nevertheless, when the oxygen carrier is reduced at a high level, the sintering of materials would be accelerated. In this paper, we prepare a Cu0·2 Fe0·8 (FeAl)Ox spinel material and investigate its hydrogen production performance. The results indicate that it exhibits a good redox stability even at reduction level of 0.75 during 20 cycles. In contrast, the deactivation of Fe2 O3 oxygen carrier can be obviously observed in the first few cycles. This enable the material with stable hydrogen production at a high yield about 7 mmol/g, which is 3.5 times higher than that of Fe2 O3 . Upon SEM and XRD characterization techniques, we find that the reason of the both good stability and high hydrogen yield is that the ability of spinel support to inhibit sintering of Cu and Fe active compositions. Highlights: A mixed spinel Cu0·2 Fe0·8 (FeAl)Ox material is synthesized as an oxygen carrier. It performs a good redox stability even at reduction level of 0.75 during 20 cycles. The spinel support can inhibit sintering of Cu and Fe active compositions.