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Robust Immobilized Amine CO 2 Sorbent Pellets Utilizing a Poly(Chloroprene) Polymer Binder and Fly Ash Additive
Author(s) -
Wilfong Walter Christopher,
Kail Brian W.,
Howard Bret H.,
Fernandes de Aquino Thiago,
Teixeira Estevam Sabrina,
Gray McMahan L.
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600319
Subject(s) - pellets , sorbent , pellet , pelletizing , chemical engineering , adsorption , materials science , desorption , fly ash , nuclear chemistry , chemistry , composite material , organic chemistry , engineering
Pelletization of ca. 50 wt % amine/silica carbon dioxide sorbents was achieved with the novel combination of fly ash (FA) as a strength additive and hydrophobic poly(chloroprene) (PC) as a binder. The PC content and overall synthesis procedure of these materials were optimized to produce pellets, labeled as FA/E100‐S_(20/80)_12.2, with the highest ball‐mill attrition resistance (<0.5 wt % by fines, 24 h) and maximum CO 2 capture capacity of 1.78 mmol CO 2 g −1 . The strength of the pellets was attributed to hydrogen‐bonding of the relatively homogeneous PC network with the interlocked FA and BIAS particles (DRIFTS, SEM‐EDS). The low degradation of 3–4 % in the pellet's CO 2 capture capacity under both dry TGA (7.5 h) and practical fixed‐bed (6.5 h dry; 4.5 h humid,≈5 vol % H 2 O) CO 2 adsorption–desorption conditions highlights the pellet's excellent cyclic stability. These robust pellet characteristics make PC/FA/sorbent materials promising for commercial scale, point‐source CO 2 capture.