The further activation and functionalization of semicoke for CO2 capture from flue gases†,RSC Advances

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The further activation and functionalization of semicoke for CO2 capture from flue gases†
RSC Advances ( IF 3.9 ) Pub Date : 2018-10-16 00:00:00 , DOI: 10.1039/c8ra07560c
Xia Wang ₁ , Wulan Zeng ₁ , Qingjie Guo ₂ , Qijin Geng ₁ , Yongmei Yan ₁ , Xiude Hu ₂

Affiliation

To systematically study CO₂ adsorption performance, semicoke from the low-rank lignite was further activated and functionalized for CO₂ capture from flue gases. The effect of the activation conditions, such as the activation temperature, activation time and HCl washing, and the tetraethylenepentamine (TEPA)-functionalization on CO₂ adsorption were investigated; the pore structure and surface morphology of the semicoke under different activation conditions were characterized. Both the surface structure and adsorption performance of the activated semicoke could be improved under appropriate activation and acid-treatment conditions. The optimal breakthrough and equilibrium adsorption capacity for the TEPA-functionalized HCl-washed activated semicoke were separately 2.68 and 3.70 mmol g⁻¹ at 60 °C for the simulated flue gas of 15 vol% CO₂ and 85 vol% N₂. After ten adsorption–desorption cycles, the equilibrium adsorption capacity was still 3.43 mmol g⁻¹, and the semicoke-based sorbent showed good regenerability.

中文翻译：

半焦的进一步活化和功能化以从烟气中捕获 CO2†

为了系统地研究CO ₂吸附性能，来自低阶褐煤的半焦被进一步活化和功能化以从烟气中捕获CO _{2 。}活化温度、活化时间、HCl洗涤等活化条件以及四亚乙基五胺（TEPA）功能化对CO _2的影响吸附进行了研究；对不同活化条件下半焦的孔结构和表面形貌进行了表征。在适当的活化和酸处理条件下，活化半焦的表面结构和吸附性能均得到改善。_{对于 15 vol% CO 2}和 85 vol% N ₂的模拟烟气，TEPA 官能化 HCl 洗涤的活化半焦在 60 °C 下的最佳突破和平衡吸附容量分别为 2.68 和 3.70 mmol g ^-1。经过十次吸附-解吸循环后，平衡吸附容量仍为3.43 mmol g ^-1，半焦基吸附剂表现出良好的再生性。

更新日期：2018-10-16

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