Reactivation of calcium-based sorbent by water hydration for CO2 capture

► Periodic water hydration is effective to reactivate two sorbents. ► Water hydration was independent of operating parameters. ► The synthetic sorbent showed strong dependence on operating parameters. ► The conversion of limestone cannot be further enhanced by ultrasonic hydration. ► The conversion...

Full description

Saved in:
Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2012-08, Vol.198-199, p.38-44
Main Authors: Yin, Junjun, Zhang, Cheng, Qin, Changlei, Liu, Wenqiang, An, Hui, Chen, Gang, Feng, Bo
Format: Article
Language:English
Subjects:
Activation
Applied sciences
Calcium looping
Calcium-based sorbent
Carbon capture and storage
Carbon dioxide
Cements
Chemical engineering
CO2 capture
Conversion
Exact sciences and technology
Hydration
Limestone
Sorbents
Ultrasonic hydration
Water hydration
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:► Periodic water hydration is effective to reactivate two sorbents. ► Water hydration was independent of operating parameters. ► The synthetic sorbent showed strong dependence on operating parameters. ► The conversion of limestone cannot be further enhanced by ultrasonic hydration. ► The conversion of the synthetic sorbent can be recovered by ultrasonic hydration. Calcium looping is an emerging CO2 capture technology in which CO2 is captured at high temperature using a calcium-based sorbent, which however suffers from a well-known problem of loss-in-capacity after a few cycles. Water hydration is a potential method that can be applied to reactivate the sorbent on-site. The present work confirmed the effectiveness of periodic water hydration on the reactivation of a limestone and a synthetic CaO/cement sorbent. Furthermore, it was found that the water hydration of calcined limestone was independent of the factors, such as particle size, hydration duration, hydration temperature, and pre-calcination temperature. Also the conversion of hydrated limestone cannot be further enhanced by ultrasonic hydration. In contrast, the synthetic CaO/cement sorbent showed strong dependence on those factors. In addition, the CaO conversion of the synthetic CaO/cement sorbent can be recovered to more than 80% by ultrasonic hydration.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2012.05.078