Journal
CHEMICAL ENGINEERING JOURNAL
Volume 371, Issue -, Pages 424-432Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.04.072
Keywords
Li4SiO4; Vermiculite; Zeolite; Cycling stability; Sorption kinetics
Categories
Funding
- National Natural Science Foundation of China [51572029, 51622801, U1810209]
- Beijing Natural Science Foundation [2184114]
Ask authors/readers for more resources
Li4SiO4 is a type of very promising high-temperature CO2 sorbent, but suffers from poor cycling stability and low CO2 uptake under relatively low CO2 concentrations. In this contribution, we synthesized hierarchical Li4SiO4 nanoparticles/flakers composite from vermiculite/MCM-41 hybrid precursor and demonstrated these hybridtype sorbents possess improved CO2 capture performance under different CO2 concentrations. The structural and morphological properties of synthesized n-(VER/MCM-41) (n= 1, 2, 3) precursors and the resulting Li4SiO4-based sorbents n-(VER/MCM-41)-Li4SiO4 were carefully characterized using XRD, SEM, BET, and XRF. Then the CO2 uptakes and CO2 sorption kinetics of n-(VER/MCM-41)-Li4SiO4 were evaluated at different temperatures (500-650 degrees C). We also found that the n-(VER/MCM-41)-Li4SiO4 is much less affected by CO2 concentration. Finally, the regenerative property and thermal stability of n-(VER/MCM-41)-Li4SiO4, VER-Li4SiO4, and MCM-41Li(4)SiO(4) were compared. In all, we demonstrated this new Li4SiO4 possesses the merits of both MCM-41-Li4SiO4 and VER-Li4SiO4 including high CO2 uptake, less effected by CO2 concentration, fast CO2 capture kinetics, and excellent cycling stability.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available