Characteristics of SrCo_1-xFe_xO_3-δPerovskite Powders with Improved O₂/CO₂Production Performance for Oxyfuel Combustion

Abstract

Perovskite-type oxides are promising oxygen carriers in producing oxygen-enriched CO 2 gas stream for oxyfuel combustion. In this study, a new series of SrCo 1-x Fe x O 3-δ (x = 0.2, 0.4, 0.6, 0.8) was prepared and used to produce O 2 /CO 2 mixture gas. The phase, crystal structure, and morphological properties of SrCo 1-x Fe x O 3-δ were investigated through X-ray diffraction, specific surface area measurements, and environmental scanning electron microscopy. The oxygen desorption performance of SrCo 1-x Fe x O 3-δ was studied in a fixed-bed reactor system. Results showed that the different x values of SrCo 1-x Fe x O 3-δ have no obvious effects on crystalline structure. However, the oxygen desorption performance of SrCo 1-x Fe x O 3-δ is improved by Co doping. Moreover, SrCo 0.8 Fe 0.2 O 3-δ synthesized via a new EDTA method has a larger BET surface area (40.396 m 2 /g), smaller particle size (48.3 nm), and better oxygen production performance compared with that synthesized through a liquid citrate method.

Optimize process parameters of microwave-assisted EDTA method using orthogonal experiment for novel BaCoO 3−δ perovskite

“…This paper is an extension of two previous publication by Shen at al [1,2]. The previous study demonstrate that perovskite with smaller crystallite size and higher porosity obtained by the microwave-assisted EDTA synthesis method showed better oxygen production performance than those prepared by conventional EDTA method.…”

Experimental Study of O2-Enriched CO2 Production by BaCo0.8B0.2O3−δ (B=Ce, Al, Fe, Cu) Perovskites Sorbent for Marine Exhaust CO2 Capture Application

“…The perovskite powders were prepared using an ethylenediaminetetraacetic acid (EDTA)-citrate complex gel method [17]. The oxygen carriers in this study were prepared using nitrate forms such as Barium All the raw chemicals used were of analytical grade purity.…”

“…At present, there are few practical applications of oxy-fuel combustion technology on ships, and most of the related research is still at the basic research stage. Oxy-fuel combustion has the following advantages: (1) up to 95% CO 2 concentration in the dry flue gas; (2) improved boiler efficiency; (3) reduced power consumption in flue gas treatment because of the small amount of flue gas involved; (4) reduced ship NO x and SO 2 emissions [17,18]. In oxy-fuel combustion, the energy-intensive air separation unit needs to provide a large amount of pure oxygen, which will increase costs [19].…”

“…Perovskite-type oxides ABO 3 can be customized to create various catalysts by changing the A-or the B-site metal ion. A series of fundamental studies on synergistic effects of A/B-site elements were studied from our group [16,17,29]. Zheng et al found that SrCo 1−x Fe x O 3−δ has fine oxygen desorption performance [17].…”

“…A series of fundamental studies on synergistic effects of A/B-site elements were studied from our group [16,17,29]. Zheng et al found that SrCo 1−x Fe x O 3−δ has fine oxygen desorption performance [17]. Besides, in order to explore how dopant affects functional properties, they investigated the surface morphology, phase and crystal structure of SrCo 1-x Fe x O 3−δ through XRD, BET, etc.…”