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Development of Alkali Nitrate‐Containing Li 4 SiO 4 for High‐Temperature CO 2 Capture
Author(s) -
Wang Ke,
Hong Jie,
Zhou Zhongyun,
Lin Zhiwei,
Zhao Pengfei
Publication year - 2019
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.201800229
Subject(s) - x ray photoelectron spectroscopy , sorption , thermogravimetric analysis , differential scanning calorimetry , scanning electron microscope , alkali metal , materials science , crystallite , eutectic system , analytical chemistry (journal) , nuclear chemistry , inorganic chemistry , chemical engineering , chemistry , adsorption , organic chemistry , microstructure , metallurgy , physics , engineering , composite material , thermodynamics
High efficiency alkali nitrate‐containing Li 4 SiO 4 sorbents were synthesized by a hydration technique to improve their sorption performances at low CO 2 concentrations. X‐ray diffraction (XRD), scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), and thermogravimetric analyses were used to detect the characteristics of the samples. The results showed that the presence of KNO 3 and NaNO 3 induced small crystallite size, corrugated morphologies and the formation of eutectic phases, noticeably facilitating sorption processes. At the optimized additive amount of 0.035 mol %, NaNO 3 ‐containing Li 4 SiO 4 reached a maximum absorption capacity (≈34.6 wt %). Moreover, both alkali nitrate‐containing Li 4 SiO 4 sorbents showed good cyclic properties, demonstrating their great potential for high‐temperature CO 2 capture.