Development of a Fe/Mg-bearing metallurgical waste stabilized-CaO/NiO hybrid sorbent-catalyst for high purity H2 production through sorption-enhanced glycerol steam reforming. (17th July 2020)

• Record Type: Journal Article
• Authors: Aissaoui, Mustapha; Zadeh Sahraei, Ommolbanin Ali; Yancheshmeh, Marziehossadat Shokrollahi; Iliuta, Maria C.
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 36(2020)
• Page Start: 18452
• Page End: 18465
• Publication Date: 2020-07-17
• Subjects: CO2 sorption -- CaO sorbent -- Industrial waste -- Hybrid sorbent-catalyst material -- Sorption-enhanced glycerol steam reforming -- High-purity hydrogen production; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.08.216
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this work, a Fe/Mg-bearing metallurgical waste (upgraded slag oxide, UGSO) was, for the first time, investigated as a stabilizer for increasing the cyclic stability of CaO-based sorbents. The sorbents were prepared through the wet mixing of the ball-milled UGSO particles with the limestone-derived calcium citrate under sonication. The sorption capacity of samples containing different waste loadings (5, 10, 15, and 25 wt%) was studied for 18 carbonation/regeneration cycles under conditions similar to the sorption-enhanced glycerol steam reforming process. A significant improvement of the cyclic stability was observed for all doped sorbents; however, the sample with 10 wt% UGSO showed the highest sorption capacity among all tested samples. This optimum sorbent was further used to synthesize a UGSO stabilized CaO–NiO hybrid sorbent-catalyst material (20 wt% NiO loading), whose performance was tested in sorption-enhanced steam reforming of glycerol. A H2 purity of around 95% was obtained in the pre-breakthrough period that lasted for about 30 min. In summary, the results showed a better stability of UGSO stabilized sorbents compared to pure CaO and a good performance of the CaO-UGSO10/NiO sorbent-catalyst hybrid material in the sorption-enhanced reforming process. Highlights: Development of a metallurgical waste (UGSO) stabilized-CaO/NiO hybrid sorbent-catalyst material. Addition of UGSO highly improved the CO2 capture performance (CaO conversion and cyclic stability). H2 purity of 95% was achieved for 10 wt% UGSO and 20% NiO loading. The waste-derived material has great potential for high-purity H2 production through cyclic SESRG.