Experimental Analyses on Feasibility of Chemical‐Looping CoO/CoAl2O4 with Additive for Solar Thermal Fuel Production. Issue 9 (15th May 2017)

• Record Type: Journal Article
• Authors: Hong, Hui; Zhang, Hao; Han, Tao; He, Fengjuan; Jin, Hongguang
• Is Part Of: Energy technology. Volume 5:Issue 9(2017:Sep.)
• Page Start: 1536
• Page End: 1545
• Publication Date: 2017-05-15
• Subjects: cobalt -- energy conversion -- platinum -- reduction -- rhodium; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201600775
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract: Solar thermal fuel production from solar heat is considered an innovative technology for the utilization of solar energy. The process of solar‐heat‐driven hydrocarbon fuel reformation is a promising approach for solar thermal fuel production. Here, perspectives on the use of solar heat at approximately 673–723 K to drive dimethyl ether (DME) reformation with a looping material of (CoO+1.0 % PtO2 )/CoAl2 O4 are given for the production of solar thermal fuel, and the experimental results for the thermochemical reactivity and the stability of this looping material are discussed in particular. The experimental results indicate that the synthesized (CoO+1.0 % PtO2 )/CoAl2 O4 shows good reactivity at a solar thermal fuel production temperature of 673–723 K, at which the conversion rate is 80–95 %. Moreover, the looping material also shows a satisfactory stable redox stability over 16 cycles. To avoid the deactivation of the looping material by carbon deposition, H2 O is introduced to accompany the solar‐driven reduction of (CoO+1.0 % PtO2 )/CoAl2 O4 with DME. Although the PtO2 additive is expensive and not "ideal", the results obtained in this study may provide a starting point for solar thermal fuel production from mid‐temperature solar heat using the chemical‐looping combustion of DME. Abstract : Good additives ! PtO2 and Rh2 O3 are selected as additives to improve the reactivity of CoO/CoAl2 O4, which is used as a looping material for solar thermal fuel production from mid‐ and low‐temperature solar heat. With PtO2 and Rh2 O3 as additives, the starting temperature for CoO reduction by dimethyl ether can be reduced from 620 K to approximately 570 K.