scholarly journals Multicycle Performance of CaTiO3 Decorated CaO-Based CO2 Adsorbent Prepared by a Versatile Aerosol Assisted Self-Assembly Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3188
Author(s):  
Ren-Wei Chang ◽  
Chin-Jung Lin ◽  
Ya-Hsuan Liou
Keyword(s):  
High Temperature ◽  
Co2 Capture ◽  
Self Assembly ◽  
Fast Kinetics ◽  
Assembly Method ◽  
Calcium Loading ◽  
Co2 Capture Capacity ◽  
Thermal Stability Of ◽  
Capture Capacity ◽  
Co2 Adsorbent

Calcium oxide (CaO) is a promising adsorbent to separate CO2 from flue gas. However, with cycling of carbonation/decarbonation at high temperature, the serious sintering problem causes its capture capacity to decrease dramatically. A CaTiO3-decorated CaO-based CO2 adsorbent was prepared by a continuous and simple aerosol-assisted self-assembly process in this work. Results indicated that CaTiO3 and CaO formed in the adsorbent, whereas CaO gradually showed a good crystalline structure with increased calcium loading. Owing to the high thermal stability of CaTiO3, it played a role in suppressing the sintering effect and maintaining repeated high-temperature carbonation and decarbonation processes. When the calcium and titanium ratio was 3, the CO2 capture capacity was as large as 7 mmol/g with fast kinetics. After 20 cycles under mild regeneration conditions (700 °C, N2), the performance of CO2 capture of CaTiO3-decorated CaO-based adsorbent nearly unchanged. Even after 10 cycles under severe regeneration conditions (920 °C, CO2), the performance of CO2 capture still remained nearly 70% compared to the first cycle. The addition of CaTiO3 induced good and firm CaO dispersion on its surface. Excellent kinetics and stability were evident.

scholarly journals Multi-Metals CaMgAl Metal-Organic Framework as CaO-based Sorbent to Achieve Highly CO2 Capture Capacity and Cyclic Performance

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2220 ◽  
Author(s):  
Szu-Chen Wu ◽  
Po-Hsueh Chang ◽  
Chieh-Yen Lin ◽  
Cheng-Hsiung Peng
Keyword(s):  
Metal Ions ◽  
Co2 Capture ◽  
Self Assembly ◽  
Metal Organic Framework ◽  
Hydrothermal Process ◽  
Gravimetric Analysis ◽  
Metal Organic ◽  
Co2 Capture Capacity ◽  
Capture Capacity ◽  
Organic Framework

In this study, Ca-based multi-metals metal-organic framework (CaMgAl-MOF) has been designed as precursor material for carbon dioxide (CO2) capture to enhance the CO2 capture capacity and stability during multiple carbonation-calcination cycles. The CaMgAl-MOFs were constructed from self-assembly of metal ions and organic ligands through hydrothermal process to make metal ions uniformly distributed through the whole structure. Upon heat treatment at 600 °C, the Ca-based multi-metals CaMgAl-MOF would gradually transform to CaO and MgO nanoparticles along with the amorphous aluminum oxide distributed in the CaO matrix. XRD, Fourier transform infrared (FTIR), and SEM were used to identify the structure and characterize the morphology. The CO2 capture capacity and multiple carbonation-calcination cyclic tests of calcined Ca-based metal-organic framework (MOF) (attached with O and indicated as Ca-MOF-O) were performed by thermal gravimetric analysis (TGA). The single metal component calcined Ca-MOF sorbent have the highest CO2 capture capacity up to 72 wt.%, but a lower stability of 61% due to severe particle aggregation. In contrast, a higher Ca-rich MOF oxide sorbent with tailoring the Mg/Al ratios, Ca0.97Mg0.025Al0.005-MOF-O, showed the best performance, not only having the high stability of ~97%, but also maintaining the highest capacity of 71 wt.%. The concept of using Ca-based MOF materials combined with mixed-metal ions for CO2 capture showed a potential route for achieving efficient multiple carbonation-calcination CO2 cycles.

Ca-Rich Ca-Al-Oxide, High-Temperature-Stable Sorbents Prepared from Hydrotalcite Precursors: Synthesis, Characterization, and CO2 Capture Capacity

ChemSusChem ◽  
2011 ◽  
Vol 4 (12) ◽  
pp. 1844-1851 ◽  
Author(s):  
Po-Hsueh Chang ◽  
Yen-Po Chang ◽  
San-Yuan Chen ◽  
Ching-Tsung Yu ◽  
Yau-Pin Chyou
Keyword(s):  
High Temperature ◽  
Co2 Capture ◽  
Co2 Capture Capacity ◽  
Capture Capacity ◽  
Al Oxide

scholarly journals High temperature CO2 capture of hydroxyapatite extracted from tilapia scales

2017 ◽  
Vol 22 (3) ◽  
pp. 215 ◽  
Author(s):  
Oscar H Ojeda-Niño ◽  
Carolina Blanco ◽  
Carlos E Daza
Keyword(s):  
High Temperature ◽  
Surface Area ◽  
Co2 Capture ◽  
X Ray Diffraction ◽  
Acid Base ◽  
High Co2 ◽  
X Ray ◽  
Co2 Capture Capacity ◽  
Capture Capacity ◽  
Scanning Electron

Hydroxyapatite (HAp) was obtained from tilapia scales by two extraction<br />methods: direct calcination and acid-base treatment. The physicochemical<br />characteristics of the obtained HAps were evaluated by thermogravimetric<br />analysis, X-ray fluorescence, X-ray diffraction, scanning electron microscopy, surface area, infrared spectroscopy, and basicity measurement at 298 K by CO2-pulse titration. Furthermore, the CO2 capture capacity of the solids at high temperature was also determined. Both methods showed the presence of a HAp phase although significant differences in the properties of the solids were found. The HAp obtained by direct calcination, exhibited a lower crystallinity and a greater surface area and basicity than the HAp obtained by the acid-base treatment. These features were correlated with the solid’s CO2 capture capacity. In this work, CO2 capture capacity values for HAp yielded by calcination ranged from 2.5 to 3.2 mg CO2 /g captured at 973 K, and for the acid-base treatment-derived HAp, CO2 capture capacity values between 1.2 to 2.5 mg CO2 /g were recorded. These results reveal the potential of HAps extracted from tilapia scales as solids with high CO2 capture capacity, thermal stability, and capture/release cycles reversibility.

scholarly journals Acetate intercalated Mg-Al layered double hydroxides (LDHs) through modified amide hydrolysis: A new route to synthesize novel mixed metal oxides (MMOs) for CO2 capture.

2021 ◽  
Author(s):  
Manohara Gudiyor Veerabhadrappa ◽  
David Norris ◽  
Mercedes Maroto-Valer ◽  
Susana García
Keyword(s):  
High Temperature ◽  
Metal Oxides ◽  
Co2 Capture ◽  
Layered Double Hydroxides ◽  
Mixed Metal Oxides ◽  
Mixed Metal ◽  
Amide Hydrolysis ◽  
Co2 Capture Capacity ◽  
Double Hydroxides ◽  
Capture Capacity

Layered double hydroxides (LDHs) based mixed metal oxides (MMOs) are promising high temperature CO2 capture sorbents. In order to improve their CO2 capture capacity, it is crucial to bring in...

scholarly journals Lithium silicate nanosheets with excellent capture capacity and kinetics with unprecedented stability for high-temperature CO2 capture

2021 ◽  
Vol 12 (13) ◽  
pp. 4825-4835 ◽  
Author(s):  
Rajesh Belgamwar ◽  
Ayan Maity ◽  
Tisita Das ◽  
Sudip Chakraborty ◽  
Chathakudath P. Vinod ◽  
...  
Keyword(s):  
High Temperature ◽  
Co2 Capture ◽  
Mixed Phase ◽  
Phase Model ◽  
Lithium Silicate ◽  
Fast Kinetics ◽  
Capture Capacity ◽  
Enhanced Stability

Capturing CO2 before its release. Lithium silicate nanosheets showed high CO2 capture capacity (35.3 wt%) with ultra-fast kinetics (0.22 g g−1 min−1) and enhanced stability at 650 °C for at least 200 cycles, due to mixed-phase-model of CO2 capture.

Morphology and composition controllable synthesis of Mg–Al–CO3 hydrotalcites by tuning the synthesis pH and the CO2 capture capacity

2012 ◽  
Vol 55 ◽  
pp. 18-26 ◽  
Author(s):  
Qiang Wang ◽  
Hui Huang Tay ◽  
Zhanhu Guo ◽  
Luwei Chen ◽  
Yan Liu ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Controllable Synthesis ◽  
Co2 Capture Capacity ◽  
Capture Capacity

Enhanced CO2 Capture Capacity of Nitrogen-Doped Biomass-Derived Porous Carbons

2016 ◽  
Vol 4 (3) ◽  
pp. 1439-1445 ◽  
Author(s):  
Jie Chen ◽  
Jie Yang ◽  
Gengshen Hu ◽  
Xin Hu ◽  
Zhiming Li ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Porous Carbons ◽  
Nitrogen Doped ◽  
Co2 Capture Capacity ◽  
Capture Capacity
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