Novel Nonaqueous Liquid–Liquid Biphasic Solvent for Energy-Efficient Carbon Dioxide Capture with Low Corrosivity,Environmental Science & Technology

当前位置： X-MOL 学术 › Environ. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Novel Nonaqueous Liquid–Liquid Biphasic Solvent for Energy-Efficient Carbon Dioxide Capture with Low Corrosivity
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-11-25 , DOI: 10.1021/acs.est.0c05774
Xiaobin Zhou _{1,

2} , Xiaoling Li _{1,

2} , Jianwen Wei _{1,

2} , Yinming Fan _{1,

2} , Lei Liao _{1,

2} , Hongqiang Wang _{1,

2}

Affiliation

To address the problems of the relatively high energy penalty and corrosivity of aqueous biphasic solvents, a novel nonaqueous biphasic solvent composed of 2-((2-aminoethyl)amino)ethanol (AEEA), dimethyl sulfoxide (DMSO), and N,N,N′,N″,N″-pentamethyldiethylenetriamine (PMDETA) was proposed for CO₂ capture. With optimization, this novel AEEA–DMSO–PMDETA (A–D–P) biphasic solvent could achieve a high CO₂ loading of 1.75 mol·mol^–1, of which 96.8% of the absorbed CO₂ was enriched in the lower phase with only 49.6% of the total volume. ¹³C NMR analysis and quantum calculations revealed that A–D–P could absorb CO₂ to form not only carbamate but also carbamic acid species, which were stabilized by DMSO via hydrogen-bonding interactions. Most products were highly polar and preferred to dissolve in polar DMSO rather than the less polar PMDETA, thus leading to the phase change. The thermodynamics results showed that the heat duty of A–D–P was only 1.66 GJ·ton^–1 CO₂ (393.15 K), which was significantly lower than that of the benchmark MEA (3.59 GJ·ton^–1 CO₂) and the reported aqueous biphasic solvents. Moreover, A–D–P presented a noncorrosive behavior to steel after CO₂ saturation, clearly showing its superiority over MEA and the aqueous biphasic solvents. Therefore, with superior properties of energy savings and noncorrosiveness, the A–D–P biphasic solvent could be a promising candidate for CO₂ capture.

中文翻译：

新型非水液态双相溶剂，用于低能效捕集能效二氧化碳

为了解决含水两相溶剂的相对高的能量损失和腐蚀性的问题，由2的新的非水两相溶剂- （（2-氨基乙基）氨基）乙醇（AEEA），二甲基亚砜（DMSO），和Ñ，Ñ，提出了N′，N″，N″ -五甲基二亚乙基三胺（PMDETA）用于CO ₂捕获。通过优化，这种新颖的AEEA–DMSO–PMDETA（A–D–P）双相溶剂可实现1.75 mol·mol ^–1的高CO ₂负载量，其中96.8％的吸收CO ₂富集在较低相中。仅占总量的49.6％。¹³C NMR分析和量子计算表明，ADPD可以吸收CO ₂不仅形成氨基甲酸酯而且形成氨基甲酸酯类，而氨基甲酸酯类则通过氢键作用被DMSO稳定。大多数产品是高极性的，因此优选溶于极性DMSO，而不是极性较小的PMDETA，因此会导致相变。热力学结果表明，A–D–P的热负荷仅为1.66 GJ·ton ^–1 CO ₂（393.15 K），显着低于基准MEA的热负荷（3.59 GJ·ton ^–1 CO ₂）和报告的水性双相溶剂。而且，A–D–P对CO ₂腐蚀后的钢无腐蚀饱和，清楚显示出它比MEA和双相水性溶剂优越。因此，AD-P两相溶剂具有节能和不腐蚀的卓越性能，可以成为捕获CO ₂的有希望的候选者。

更新日期：2020-12-15

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11