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DOI	10.1016/j.seppur.2024.127110
	Evaluating the performance of carbon-based adsorbents fabricated from renewable biomass precursors for post-combustion CO2 capture
	Rahimi, Vahid; Ferreiro-Salgado, Adrian; Gomez-Diaz, Diego; Freire, Maria Sonia; Gonzalez-Alvarez, Julia
发表日期	2024
ISSN	1383-5866
EISSN	1873-3794
起始页码	344
卷号	344
英文摘要	The significant increase in atmospheric CO 2 concentration originated mainly from fossil fuels combustion has encouraged the development and improvement of CO 2 separation operations to reduce emissions and control climate change and global warming. Therefore, this work is focused on the separation of CO 2 from N 2 in flue gas streams under post -combustion conditions by developing low-cost adsorbents. Six carbons were fabricated from biomass resources (olive stones and almond shells) to assess their influence on CO 2 adsorption capacity: One carbonized and two KOH-activated carbons with carbon/KOH ratio of 1:2 and 1:4 (w/w) for each precursor. The carbons were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), elemental analysis, nitrogen and carbon dioxide adsorption - desorption analysis, X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS) and point of zero charge determination. In addition, the equilibrium adsorption data of pure components for all adsorbents were measured at 0, 25 and 50 degrees C between 0 and 760 mmHg and CO 2 /N 2 selectivity was determined. Activated carbons were found to have higher CO 2 adsorption capacity but with a reduction in apparent selectivity. Dynamic binary adsorption simulations performed in a fixed-bed column demonstrated that the activated carbon produced from olive stones with a carbon/KOH ratio of 1:4 (w/w) can separate a mixture of 14 % CO 2 and 86 % N 2 at 25 and 50 degrees C with the highest selectivity, CO 2 adsorption capacity, CO 2 purity and N 2 recovery factor. Reducing flow rate, the breakthrough time increased. Moreover, the breakthrough time was reduced by increasing the temperature from 25 to 50 degrees C owing to the exothermic nature of adsorption process.
英文关键词	CO2 capture; Adsorption; Biomass carbons; CO2/N2 selectivity; Fixed-bed simulation
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
WOS记录号	WOS:001224347200001
来源期刊	SEPARATION AND PURIFICATION TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302750
作者单位	Universidade de Santiago de Compostela
推荐引用方式 GB/T 7714	Rahimi, Vahid,Ferreiro-Salgado, Adrian,Gomez-Diaz, Diego,et al. Evaluating the performance of carbon-based adsorbents fabricated from renewable biomass precursors for post-combustion CO2 capture[J],2024,344.
APA	Rahimi, Vahid,Ferreiro-Salgado, Adrian,Gomez-Diaz, Diego,Freire, Maria Sonia,&Gonzalez-Alvarez, Julia.(2024).Evaluating the performance of carbon-based adsorbents fabricated from renewable biomass precursors for post-combustion CO2 capture.SEPARATION AND PURIFICATION TECHNOLOGY,344.
MLA	Rahimi, Vahid,et al."Evaluating the performance of carbon-based adsorbents fabricated from renewable biomass precursors for post-combustion CO2 capture".SEPARATION AND PURIFICATION TECHNOLOGY 344(2024).