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Diamine based water-lean CO2 solvent with extra high cyclic capacity and low viscosity
Greenhouse Gases: Science and Technology ( IF 2.7 ) Pub Date : 2021-08-19 , DOI: 10.1002/ghg.2114
Yanjie Xu 1, 2 , Mengxiang Fang 1 , Qi Yang 2 , Zhixiang Xia 1 , Hai Yu 3 , Tao Wang 1 , Kexian Chen 4 , Graeme Puxty 3
Affiliation  

The industrial application of emerging water-lean solvents to CO2 capture from flue gas is challenged by their high viscosity. In this work, we report a novel water-lean CO2 solvent which possesses lower viscosity and higher CO2 cyclic capacity than other water-lean solvents reported in the literature. The new solvent consists of N, N-dimethyl-1, 2-ethanediamine (DMEDA), physical cosolvent N-methyl-2-pyrrolidone (NMP) and up to 15% water (named ENH). We evaluated the effect of the solvent composition on the viscosity, CO2 cyclic capacity and regeneration energy of ENH and compared it with the reference monoethanolamine (MEA) based solvents. It was found that ENH containing 5% H2O (ENH-5%H2O) with a CO2 loading of 0.767 mol CO2·mol amine–1 had a viscosity of 7.603 mPa·S at 40 ˚C, which was comparable with that of traditional blended amines. Excellent cyclic capacity performance was also observed, with ENH-5% H2O showing a 140% improvement compared to aqueous MEA. Regeneration energy of ENH-5% H2O was estimated to be 2.418 GJ·tCO2–1 which is 36% lower than the 30 wt. % aqueous MEA solvent. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

中文翻译:

具有超高循环容量和低粘度的二胺基贫水CO2溶剂

新兴的贫水溶剂从烟道气中捕获CO 2的工业应用受到其高粘度的挑战。在这项工作中,我们报告了一种新型的贫水 CO 2溶剂,与文献中报道的其他贫水溶剂相比,它具有更低的粘度和更高的 CO 2循环容量。新溶剂由N, N-二甲基-1, 2-乙二胺 (DMEDA)、物理助溶剂N-甲基-2-吡咯烷酮 (NMP) 和最多 15% 的水(命名为 ENH)组成。我们评估了溶剂组成对ENH的粘度、CO 2循环容量和再生能量的影响,并将其与基于单乙醇胺 (MEA) 的参考溶剂进行了比较。发现含有 5% H 的 ENH具有0.767 mol CO 2 ·mol 胺–1的 CO 2负载量的2 O (ENH-5%H 2 O)在 40 ˚C 下的粘度为 7.603 mPa·S,与传统混合胺的粘度相当。还观察到优异的循环容量性能,与水性 MEA 相比,ENH-5% H 2 O 显示出 140% 的改进。ENH-5% H 2 O 的再生能量估计为 2.418 GJ·tCO 2 –1,比 30 wt% 低 36%。% 水性 MEA 溶剂。© 2021 化学工业协会和 John Wiley & Sons, Ltd.
更新日期:2021-10-14
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