Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed
The high performance of polyethyleneimine (PEI)-based solid adsorbent for CO2 capture has been well recognized in thermogravimetric analysis (TGA) and small-scale fixed bed reactors through the measurements of their equilibrium capacities but has not been really demonstrated on larger scales towards...
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Elsevier
2014
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| Online Access: | https://eprints.nottingham.ac.uk/45357/ |
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| author | Zhang, Wenbin Liu, Hao Sun, Chenggong Drage, Trevor C. Snape, Colin E. |
| author_facet | Zhang, Wenbin Liu, Hao Sun, Chenggong Drage, Trevor C. Snape, Colin E. |
| author_sort | Zhang, Wenbin |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The high performance of polyethyleneimine (PEI)-based solid adsorbent for CO2 capture has been well recognized in thermogravimetric analysis (TGA) and small-scale fixed bed reactors through the measurements of their equilibrium capacities but has not been really demonstrated on larger scales towards practical utilization. In the present study, a laboratory-scale bubbling fluidized bed reactor loaded with a few kg adsorbent is used to evaluate the adsorption performance of PEI–silica adsorbent under different working conditions including with/without the presence of moisture, different gas–solid contact times, initial bed temperatures, and CO2 partial pressures. The adsorption capacities have shown a clear degradation tendency under dry condition. However, they can be stabilized at a high level of 10.6–11.1% w/w over 60 cycles if moisture (ca. 8.8 vol%) is present in the gas flow during adsorption and desorption. Breakthrough capacities can be stabilized at the level of 7.6–8.2% w/w with the gas–solid contact time of 13 s. The adsorption capacities for the simulated flue gases containing 5% CO2 are only slightly lower than those for the simulated flue gases containing 15% CO2, indicating that the PEI–silica adsorbent is suitable for CO2 capture from flue gases of both coal-fired and natural gas-fired combined cycle power plants. The exothermal heat of adsorption is estimated by the energy balance in the fluidized bed reactor and found to be close (within 10%) to the measured value by TG-DSC. The regeneration heat for the as prepared PEI–silica adsorbent is found to be 2360 kJ/kgCO2 assuming 75% recovery of sensible heat which is well below the values of 3900–4500 kJ/kgCO2 for a typical MEA scrubbing process with 90% recovery of sensible heat. |
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| institution | University of Nottingham Malaysia Campus |
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| publishDate | 2014 |
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| spelling | nottingham-453572020-05-04T16:51:51Z https://eprints.nottingham.ac.uk/45357/ Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed Zhang, Wenbin Liu, Hao Sun, Chenggong Drage, Trevor C. Snape, Colin E. The high performance of polyethyleneimine (PEI)-based solid adsorbent for CO2 capture has been well recognized in thermogravimetric analysis (TGA) and small-scale fixed bed reactors through the measurements of their equilibrium capacities but has not been really demonstrated on larger scales towards practical utilization. In the present study, a laboratory-scale bubbling fluidized bed reactor loaded with a few kg adsorbent is used to evaluate the adsorption performance of PEI–silica adsorbent under different working conditions including with/without the presence of moisture, different gas–solid contact times, initial bed temperatures, and CO2 partial pressures. The adsorption capacities have shown a clear degradation tendency under dry condition. However, they can be stabilized at a high level of 10.6–11.1% w/w over 60 cycles if moisture (ca. 8.8 vol%) is present in the gas flow during adsorption and desorption. Breakthrough capacities can be stabilized at the level of 7.6–8.2% w/w with the gas–solid contact time of 13 s. The adsorption capacities for the simulated flue gases containing 5% CO2 are only slightly lower than those for the simulated flue gases containing 15% CO2, indicating that the PEI–silica adsorbent is suitable for CO2 capture from flue gases of both coal-fired and natural gas-fired combined cycle power plants. The exothermal heat of adsorption is estimated by the energy balance in the fluidized bed reactor and found to be close (within 10%) to the measured value by TG-DSC. The regeneration heat for the as prepared PEI–silica adsorbent is found to be 2360 kJ/kgCO2 assuming 75% recovery of sensible heat which is well below the values of 3900–4500 kJ/kgCO2 for a typical MEA scrubbing process with 90% recovery of sensible heat. Elsevier 2014-09-01 Article PeerReviewed Zhang, Wenbin, Liu, Hao, Sun, Chenggong, Drage, Trevor C. and Snape, Colin E. (2014) Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed. Chemical Engineering Journal, 251 . pp. 293-303. ISSN 1385-8947 Carbon capture PEI Solid adsorbent Bubbling fluidized bed http://www.sciencedirect.com/science/article/pii/S1385894714004951 doi:10.1016/j.cej.2014.04.063 doi:10.1016/j.cej.2014.04.063 |
| spellingShingle | Carbon capture PEI Solid adsorbent Bubbling fluidized bed Zhang, Wenbin Liu, Hao Sun, Chenggong Drage, Trevor C. Snape, Colin E. Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed |
| title | Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed |
| title_full | Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed |
| title_fullStr | Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed |
| title_full_unstemmed | Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed |
| title_short | Performance of polyethyleneimine–silica adsorbent for post-combustion CO2 capture in a bubbling fluidized bed |
| title_sort | performance of polyethyleneimine–silica adsorbent for post-combustion co2 capture in a bubbling fluidized bed |
| topic | Carbon capture PEI Solid adsorbent Bubbling fluidized bed |
| url | https://eprints.nottingham.ac.uk/45357/ https://eprints.nottingham.ac.uk/45357/ https://eprints.nottingham.ac.uk/45357/ |