Development of Ca(OH)2 Nanosorbent for Intermediate-High Temperature CO2 Capture via Wet Chemical Route in N,N-Dimethylformamide Solvent

Farah Diana Mohd Daud; Srimala Sreekantan; Abdul Rahman Mohamed

doi:10.4028/www.scientific.net/AMR.911.410

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 911Development of Ca(OH)2 Nanosorbent for...

Development of Ca(OH)₂ Nanosorbent for Intermediate-High Temperature CO₂ Capture via Wet Chemical Route in N,N-Dimethylformamide Solvent

Abstract:

CO₂ is the major anthropogenic greenhouse gas which contributes to the increasing atmospheric CO₂ concentration, leading to serious global warming and climate change. Thus, the present paper investigates the CO₂-capture performance of synthesized calcium hydroxides, Ca (OH)₂nanosorbent at intermediate-high temperatures which are 350, 450, 550 and 650oC. CO₂ adsorption performance was analysed by thermo-gravimetricanalyser (TGA).The CO₂adsorption temperature strongly influenced the capture performance of the sorbent.Facile wet chemical technique was utilized to synthesize Ca (OH)₂nanorod sorbent structures using calcium nitrate tetrahydrate, Ca (NO₃)₂.4H₂O as the calcium precursor, and precipitated with sodium hydroxides (NaOH) in N,N-Dimethylformamide (DMF) mixed deionized (DI) water media at 55 oC. X-ray diffraction (XRD) result exhibitedCa (OH)₂hexagonal crystal structures. The Ca (OH)₂ particle size and morphological properties before and after CO₂ adsorption are studied by Field Emission Scanning Electron Microscopy (FESEM). The FESEM image indeed showed the rod like shape of Ca (OH)₂nanosorbent with rod length approximately700 nm while the diameter 140nm. When CO₂ molecules were adsorbed by Ca (OH)₂nanosorbent, the nanorodstructures are changed to rigid interconnected each other like a lump shaped. Ca (OH)₂nanosorbentseems to be a potentially good absorbent for capturing CO₂when increased temperatures. However, at intermediate temperature 350 and 450oC, the synthesized Ca (OH)₂nanosorbent demonstrated higher CO₂ adsorption (141 to 220 mg/g CO₂) than others intermediate temperature CO₂ sorbent such as layer double hydroxides (LDH), lithium zirconates (LiZrO₃) and hydrotalcite.

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Periodical:

Advanced Materials Research (Volume 911)

Pages:

410-414

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.911.410

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Online since:

March 2014

Authors:

Farah Diana Mohd Daud*, Srimala Sreekantan, Abdul Rahman Mohamed

Keywords:

Calcium Hydroxide, Carbon Dioxides, N,N-Dimethylformamide, Nanosorbent, Temperature

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