- Title
- A diamine-based integrated absorption-mineralization process for carbon capture and sequestration: energy savings, fast kinetics, and high stability
- Creator
- Yu, Bing; Yu, Hai; Li, Kangkang; Ji, Long; Yang, Qi; Wang, Xiaolong; Chen, Zuliang; Megharaj, Mallavarapu
- Relation
- Environmental Science & Technology Vol. 52, Issue 22, p. 13629-13637
- Publisher Link
- http://dx.doi.org/10.1021/acs.est.8b04253
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2018
- Description
- The high energy requirement of amine regeneration and the uncertainty of safe disposal of the captured CO₂ remain big challenges to the large-scale implementation of amine scrubbing process for CO₂ capture. Mineral carbonation represents a safe and permanent route to capture and store CO₂ with net energy production but typically proceeds at a slow reaction rate. Here, we present a new integrated absorption and mineralization (IAM) process that couples a diamine-based CO₂ absorption with fly-ash-triggered amine regeneration. The technical feasibility of the IAM process using 3-diethylaminopropylamine (DEAPA) and CaO-containing materials such as CaO and coal fly ashes was verified, and the reaction mechanism involved was investigated. It was found that CaO and CaO-rich coal fly ash were effective to regenerate DEAPA via the decomposition of DEAPA carbamate species and the formation of calcium carbonate precipitates. Furthermore, the diamine-based IAM process displayed a fast kinetics and a high stability for CO₂ sequestration and can reduce the leachability of some heavy metals in the fly ash. These process properties render this diamine-based IAM process a great potential for carbon capture and sequestration applications.
- Subject
- reaction products; amines; absorption; organic compounds; regeneration
- Identifier
- http://hdl.handle.net/1959.13/1412662
- Identifier
- uon:36515
- Identifier
- ISSN:0013-936X
- Language
- eng
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