CO{sub 2} absorption using dry potassium-based sorbents with different supports
- Southeast University, Nanjing (China). China School of Energy and Environment
The CO{sub 2} capture characteristics of dry potassium-based sorbents were investigated with thermogravimetric analysis (TGA) and a bubbling fluidized-bed reactor. Potassium-based sorbents were prepared by impregnation with potassium carbonate on supports such as coconut activated charcoal (AC1), coal active carbon (AC2), silica gel (SG), and activated alumina (Al{sub 2}O{sub 3}). Sorbents such as K{sub 2}CO{sub 3}/AC1, K{sub 2}CO{sub 3}/AC2, and K{sub 2}CO{sub 3}/Al{sub 2}O{sub 3} showed excellent carbonation capacity; The total conversion rates of those sorbents were 97.2, 95.9, and 95.2%, respectively in the TG test, and 89.2, 87.9, and 87.6%, respectively, in the fluidized-bed test. However, K{sub 2}CO{sub 3}/SG showed poor carbonation capacity, the total conversion rates were only 34.5 and 18.8%, respectively, in TG and fluidized-bed tests. The differences in carbonation capacity of those sorbents were analyzed by studying the microscopic structure and crystal structure of the supports and the sorbents with X-ray diffraction, scanning electron microscopy, and N{sub 2} adsorption tests. 23 refs., 10 figs.
- OSTI ID:
- 21261581
- Journal Information:
- Energy and Fuels, Vol. 23, Issue 9; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of regenerable MgO-based sorbent promoted with K{sub 2}CO{sub 3} for CO{sub 2} capture at low temperatures
CARBON DIOXIDE CAPTURE FROM FLUE GAS USING DRY REGENERABLE SORBENTS