期刊
SUSTAINABLE ENERGY & FUELS
卷 5, 期 13, 页码 3340-3350出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1se00400j
关键词
-
资金
- National Natural Science Foundation of China [21776088]
The SEWGS technology, combining WGS and in situ CO2 removal, is a promising method for producing high-purity H-2. The composition of DFMs and regeneration temperature play crucial roles in determining the SEWGS performance.
Sorption-enhanced water gas shift (SEWGS) that combines WGS and in situ CO2 removal is a promising technology for production of high-purity H-2. However, it is a challenge to develop effective difunctional materials (DFMs) for the SEWGS process. Here, we prepared a novel type of K2CO3-promoted Cu/MgO-Al2O3 DFMs by a sol-gel method. In situ DRIFTS demonstrated that the WGS reaction and adsorption of produced CO2 occurred simultaneously on the DFM. The composition-property-performance studies showed that the K/(Mg + Al) and Mg/Al atomic ratios have effects on the physicochemical properties of DFM, especially the morphology and the basicity distribution, which in turn affected the CO2 adsorption performance. In addition, the regeneration temperature of DFM used in cyclic operation was found to influence the SEWGS performance. The best DFM with a K/(Mg + Al) ratio of 0.2 and a Mg/Al ratio of 9 can completely convert CO and yield >99.9% H-2 in 10 consecutive SEWGS-regeneration cycles between 300 degrees C (for SEWGS) and 380 degrees C (for regeneration).
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