TY - JOUR
T1 - Carbonation characteristics of isolated calcium oxide nanoparticles for thermal energy storage
AU - Valavala, Krishna V.
AU - Tian, Hongxiang
AU - Sinha, Sanjiv
N1 - Funding Information:
Manuscript received 3 October 2012; accepted 10 February 2013. The authors acknowledge support from the National Science Foundation under grant NSF-CBET-09-54696-CAREER. Address correspondence to Krishna V. Valavala, Department of Mechanical Science and Engineering, University of Illinois at Urbana Champaign, 235 W. Mechanical Engineering Building, 1206 W. Green St., Urbana, IL 61801. E-mail: [email protected]
PY - 2013/8/1
Y1 - 2013/8/1
N2 - Carbonation of lime is an attractive system for thermal energy storage. The typical use of ̃10-μm particles creates well-known recycling problems. We propose the use of isolated nanoparticles dispersed over a high surface area to avoid sintering and model the conversion time characteristics of such particles. Our calculations show that reactions on the surface dominate in particles smaller than 70 nm, leading to fast conversion times. We compare our predictions against experimental data on micrometer-and nanometer-size particles to establish the validity of the model. This work shows that isolated nanoparticles arranged in scaffolds are an ideal system for realizing fast and repeatable conversion for thermal storage with high storage density.
AB - Carbonation of lime is an attractive system for thermal energy storage. The typical use of ̃10-μm particles creates well-known recycling problems. We propose the use of isolated nanoparticles dispersed over a high surface area to avoid sintering and model the conversion time characteristics of such particles. Our calculations show that reactions on the surface dominate in particles smaller than 70 nm, leading to fast conversion times. We compare our predictions against experimental data on micrometer-and nanometer-size particles to establish the validity of the model. This work shows that isolated nanoparticles arranged in scaffolds are an ideal system for realizing fast and repeatable conversion for thermal storage with high storage density.
KW - carbon sequestration
KW - carbonation
KW - energy storage
KW - porous CaO nano-particles
KW - random pore model
KW - shrinking core model
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U2 - 10.1080/15567265.2013.776153
DO - 10.1080/15567265.2013.776153
M3 - Article
AN - SCOPUS:84880239180
SN - 1556-7265
VL - 17
SP - 204
EP - 215
JO - Nanoscale and Microscale Thermophysical Engineering
JF - Nanoscale and Microscale Thermophysical Engineering
IS - 3
ER -