Carbon dioxide capture under ambient conditions using 2-chloroethylamine

Abstract

This is the first case applying 2-haloethylamine to CO 2 capture. The prospect of global warming and the urgent need to reduce atmospheric concentration of carbon dioxide has prompted actions at many levels. The conventional capture of carbon dioxide is predominantly based on chemical absorption using ethanolamine. Recent developments of carbon dioxide capture focus on new materials, such as ionic liquids, zeolites, membranes, carbonaceous absorbents, and metal-organic frameworks. However, no unique solution exists currently to solve the problem of carbon dioxide capture. In order to examine the efficiency of 2-chloroethylamine as an absorbent of CO 2 , we treated an aqueous solution of 2-chloroethylamine hydrochloride with CO 2 in the presence of an alkali, e.g., NaOH, under ambient conditions. The absorption was complete within 30 min, seemingly following first-order reaction kinetics. Furthermore, we succeeded in capturing CO 2 from ambient air using 2-chloroethanolamine. The efficiency of 2-chloroethylamine as an absorbent of CO 2 could be attributed to the production of stable 2-oxazolidinone, therefore, this reaction is favored thermodynamically. Compared with previously reported absorbents, this novel system is capable of capturing CO 2 with an extremely high efficiency of 1 mol per mol absorbent under ambient conditions, even from the atmosphere. This potential method could be used to capture CO 2 particularly from small, mobile, or low-concentration emission sources.

Recent advances in carbon capture storage and utilisation technologies: a review

“…To reduce the cost associated with the precombustion route, finding a superior absorption solvent is crucial. Currently, post-combustion technology is the most mature and widely used route among the three main routes of carbon capture and storage (Wienchol et al 2020;Wang et al 2011a). However, due to the dilution of CO 2 comes from the flue gas by N 2 from the air, this reduces the partial pressure of CO 2 and increases the additional cost in the electricity generation by approximately 60-70% for the new infrastructure or 220-250% for the retrofitting (Portillo et al 2019).…”

Carbon dioxide utilization with C–N bond formation: carbon dioxide capture and subsequent conversion

“…Recently, 2-chloroethylamine has been used for CO 2 capture under ambient conditions. 87 When a mixture of CO 2 and air (in a ratio of about 1 : 1) at atmospheric pressure is bubbled through Scheme 64 Mechanism for the reaction of CO 2 with tertiary amines. 3b Scheme 63 Reversible reaction of CO 2 with two equiv.…”

Simple solution routes for targeted carbonate phases and intricate carbonate and silicate morphologies

“…Carbonation routes are often adopted in industrial scale, due to the accessibility and low cost of initial materials and in almost all cases the process amounts to the controllable bubbling of the appropriate CO 2 gas into the aqueous solution of Ca(OH) 2 or slaked lime [47]. Nevertheless amines are capable of capturing CO 2 rather effectively (up to 1:1 ratio [51][52][53]) even from the low CO 2 content ambient air. Jung et al [48] have precipitated rhombohedral and scalenohedral calcite by mixing solutions of Ca(OH) 2 and CO 2 in stoichiometric and non-stoichiometric conditions respectively.…”