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Title: Flame-made durable doped-CaO nanosorbents for CO{sub 2} capture

Abstract

The present study deals with the design and development of novel calcium-oxide-based refractory sorbents synthesized by flame spray pyrolysis (FSP) for carbon dioxide capture. The FSP-derived sorbents inherently exhibit very large CO{sub 2} uptake capacity in the present investigation. Sorbents derived from conventional wet chemistry, possessing identical composition, were synthesized and evaluated. A wide range of refractory dopants (Si, Ti, Cr, Co, Zr, and Ce) were employed, aiming at developing sorbents with good mechanical strength. Among all of the doped CaO sorbents, Zr-doped CaO was found to exhibit the best CO{sub 2}-capture performance under identical conditions of operation. To study the effect of Zr in depth and find out the optimal concentration of Zr needed in the CaO matrix, a series of Zr-incorporated CaO sorbents were synthesized by varying the relative composition of Zr in the CaO base matrix. The present studies suggest that Zr/Ca in the 3:10 atomic ratio results in the formation of the most robust nanosorbent for multicyclic operation. This sorbent retained, unchanged, its ability to capture CO{sub 2} during extended cycles. It also demonstrated excellent stability under operating in the presence of water vapor (10 vol %). The present paper represents two novel developments in themore » field of CO{sub 2} capture, first, the superiority of FSP process and, second, the role of ZrO{sub 2} dopant in improving the durability and robustness of the CaO-based sorbent. 29 refs., 11 figs., 3 tabs.« less

Authors:
; ; ;  [1]
  1. University of Cincinnati, OH (USA). Chemical and Materials Engineering Department
Publication Date:
OSTI Identifier:
21162112
Resource Type:
Journal Article
Journal Name:
Energy and Fuels
Additional Journal Information:
Journal Volume: 23; Journal Issue: 2; Other Information: panagiotis.smirniotis@uc.edu; Journal ID: ISSN 0887-0624
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CALCIUM OXIDES; NANOSTRUCTURES; CARBON DIOXIDE; CAPTURE; CAPACITY; REFRACTORY METAL COMPOUNDS; ZIRCONIUM; DOPED MATERIALS; ADSORBENTS; FLAME SPRAYING; REFRACTORIES

Citation Formats

Lu, Hong, Khan, Ataullah, Pratsinis, Sotiris E, and Smirniotis, Panagiotis G. Flame-made durable doped-CaO nanosorbents for CO{sub 2} capture. United States: N. p., 2009. Web.
Lu, Hong, Khan, Ataullah, Pratsinis, Sotiris E, & Smirniotis, Panagiotis G. Flame-made durable doped-CaO nanosorbents for CO{sub 2} capture. United States.
Lu, Hong, Khan, Ataullah, Pratsinis, Sotiris E, and Smirniotis, Panagiotis G. Thu . "Flame-made durable doped-CaO nanosorbents for CO{sub 2} capture". United States.
@article{osti_21162112,
title = {Flame-made durable doped-CaO nanosorbents for CO{sub 2} capture},
author = {Lu, Hong and Khan, Ataullah and Pratsinis, Sotiris E and Smirniotis, Panagiotis G},
abstractNote = {The present study deals with the design and development of novel calcium-oxide-based refractory sorbents synthesized by flame spray pyrolysis (FSP) for carbon dioxide capture. The FSP-derived sorbents inherently exhibit very large CO{sub 2} uptake capacity in the present investigation. Sorbents derived from conventional wet chemistry, possessing identical composition, were synthesized and evaluated. A wide range of refractory dopants (Si, Ti, Cr, Co, Zr, and Ce) were employed, aiming at developing sorbents with good mechanical strength. Among all of the doped CaO sorbents, Zr-doped CaO was found to exhibit the best CO{sub 2}-capture performance under identical conditions of operation. To study the effect of Zr in depth and find out the optimal concentration of Zr needed in the CaO matrix, a series of Zr-incorporated CaO sorbents were synthesized by varying the relative composition of Zr in the CaO base matrix. The present studies suggest that Zr/Ca in the 3:10 atomic ratio results in the formation of the most robust nanosorbent for multicyclic operation. This sorbent retained, unchanged, its ability to capture CO{sub 2} during extended cycles. It also demonstrated excellent stability under operating in the presence of water vapor (10 vol %). The present paper represents two novel developments in the field of CO{sub 2} capture, first, the superiority of FSP process and, second, the role of ZrO{sub 2} dopant in improving the durability and robustness of the CaO-based sorbent. 29 refs., 11 figs., 3 tabs.},
doi = {},
journal = {Energy and Fuels},
issn = {0887-0624},
number = 2,
volume = 23,
place = {United States},
year = {2009},
month = {1}
}