Preparation and So2 Capture Performance of Ncp10/Lioh Nano-Carbon Based Composite for Deep Desulfurization

In order to meet the stringent requirements of deep desulfurization, further improvements on nano-carbon materials are necessary, such as improving their SO 2 capture performance and adaptability to changes in desulfurization temperature. In this study, a nano-carbon material (NCP10) was modified with various alkali metal compounds with the aim of enhancing the SO 2 capture performance and adaptability to temperature changes, and the results showed that our goal was achieved. The results showed that the NCP10 composites could capture SO 2 by physical adsorption and chemical absorption synergistically, and the SO 2 capture performance and adaptability to desulfurization temperature of the NCP10 could be enhanced by doping with alkali metal compounds. In our experiment, the NCP10/LiOH composite had the best average SO 2 removal rate (100%) and SO 2 capture capacity (113.6 mg SO2 /g material ) within the first hour of reacting at 60 °C, these results were 29% and 29% higher than those of pure NCP10 material, respectively. While the SO 2 capture performance of the NCP10 doped with LiCl, Li 2 CO 3 , NaOH and KOH were not sufficient for deep desulfurization, the SO 2 capture performance of the NCP10/LiOH(2:1) composite was able to meet the requirements of deep desulfurization in the temperature range of 25 °C-100 °C. Therefore, it is important to comprehensively consider which type of alkali metal compound should be used to dope the nano-carbon materials and also at what concentrations