Target-specific modification of diethylenetriamine with hydroxyalkyls: Efficient absorbents for CO2 capture

Wu, Yan; Qian, Jun; Jiang, Yao; Jia, Shaojun; Xu, Xin; Liu, Xiao-Qin; Cui, Peng

doi:10.1016/j.seppur.2023.126075

Cited by 10 publications

(2 citation statements)

References 65 publications

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“…In summary, the strength of the SGP-solidified soil all increased with age, in which TEA and PVA had a reinforcing effect on the UCS of the SGP-solidified soil, while Na 2 SO 4 had a weakening effect. The enhancement of PVA was due to its hydrolysis of aluminum hydroxyl complexes with large molecular weight and high charge that can play the role of electrical neutralization and adsorption bridging, strong adsorption and complexation of ions in solution, especially SiO 3 2− , which promoted the continued dissolution of the mineral phase components of GBFS and PS [50][51][52]. The incorporation of Na 2 SO 4 led to a high Na + concentration in the SGP-solidified soil, and the thickness of the soil particle bilayer increased after a large amount of Na + was adsorbed on the surface of negatively charged soil particles [2].…”

Section: The Effect Of Additivesmentioning

confidence: 99%

“…strong adsorption and complexation of ions in solution, especially SiO3 2-, which promoted the continued dissolution of the mineral phase components of GBFS and PS [50][51][52]. The incorporation of Na2SO4 led to a high Na + concentration in the SGP-solidified soil, and the thickness of the soil particle bilayer increased after a large amount of Na + was adsorbed on the surface of negatively charged soil particles [2].…”

Section: The Effect Of Additivesmentioning

confidence: 99%

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The Design of a Novel Alkali-Activated Binder for Solidifying Silty Soft Clay and the Study of Its Solidification Mechanism

Jing,

Zhang,

Zhang

et al. 2024

Materials

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In order to overcome the problems of the high economic and environmental costs of a traditional ordinary portland cement-based binder, this study used self-combusted coal gangue (SCCG), granulated blast furnace slag (GBFS) and phosphorous slag (PS) to prepare a novel SCCG-GBFS-PS (SGP) ternary alkali-activated binder for solidifying silty soft clay (SC). Firstly, the parameters of the SGP ternary binder were optimized using orthogonal experiments. Then the effects of the SGP ternary binder content (mass ratio of the SGP ternary binder and the SGP-solidified soil), initial water content of SC (mass ratio of SC’ water and SC) and types of additives on the unconfined compressive strength (UCS) of the SGP-solidified soil were analyzed. Finally, the hydration products and microstructure of the SGP-solidified soil were analyzed to investigate the solidification mechanism of the SGP ternary binder. The results showed that the optimal mass ratio of GBFS and PS is 2:1, and the optimal alkali activator content (mass ratio of Na2O and the SGP ternary binder) and modulus of alkali activator (molar ratio of SiO2 and Na2O of alkali activator) were 13% and 1.3, respectively. When the SGP ternary binder content was 16% and the initial water content of SC was 35%, the SGP-solidified soil met the requirement of UCS for tertiary cured soil. The incorporation of triethanolamine and polyvinyl alcohol improved the UCS, while the incorporation of Na2SO4 significantly deteriorated the UCS of the SGP-solidified soil. The C-S-H gels and C(N)-A-S-H gels generated by hydration of the SGP-solidified soil were interspersed, interwoven and adhered to each other to form a network-like space structure that played the roles of skeleton, bonding soil particles and filling pores, which improved the macroscopic properties of the SGP-solidified soil. The results of this study provide a reference for the design and development of a solid waste-based binder for solidifying SC.

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