Adsorption Performance of Physically Activated Biochars for Postcombustion CO2 Capture from Dry and Humid Flue Gas
Source abstract
Abstract
In the present study, the performance of four biomass-derived physically activated biochars for dynamic CO2 capture was assessed. Biochars were first produced from vine shoots and wheat straw pellets through slow pyrolysis (at pressures of 0.1 and 0.5 MPa) and then activated with CO2 (at 0.1 MPa and 800 °C) up to different degrees of burn-off. Cyclic adsorption-desorption measurements were conducted under both dry and humid conditions using a packed-bed of adsorbent at relatively short residence times of the gas phase (12–13 s). The adsorbent prepared from the vine shoots-derived biochar obtained by atmospheric pyrolysis, which showed the most hierarchical pore size distribution, exhibited a good and stable performance under dry conditions and at an adsorption temperature of 50 °C, due to the enhanced CO2 adsorption and desorption rates. However, the presence of relatively high concentrations of water vapor in the feeding gas clearly interfered with the CO2 adsorption mechanism, leading to significantly shorter breakthrough times. In this case, the highest percentages of a used bed were achieved by one of the other activated biochars tested, which was prepared from the wheat straw-derived biochar obtained by pressurized pyrolysis.
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Research context
OpenAlex topics: Carbon Dioxide Capture Technologies · Phase Equilibria and Thermodynamics · Atmospheric and Environmental Gas Dynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Aragón Institute of Engineering Research (I3A), Technological College of Huesca, University of Zaragoza, crta. Cuarte s/n, E-22071 Huesca, Spain
Funding
Ministerio de Ciencia, Innovación y Universidades
References (32)
Show source-provided references
1. Carbon-Based Adsorbents for Postcombustion CO2 Capture: A Critical Review10.1021/acs.est.6b00627 ↗
2. Enhanced CO2 Capture Capacity of Nitrogen-Doped Biomass-Derived Porous Carbons10.1021/acssuschemeng.5b01425 ↗
3. Efficient CO2 Capture by Porous Carbons Derived from Coconut Shell10.1021/acs.energyfuels.7b00633 ↗
4. Biomass-derived activated carbon with simultaneously enhanced CO2 uptake for both pre and post combustion capture applications10.1039/C5TA09202G ↗
5. Preparation of porous carbons with high low-pressure CO2 uptake by KOH activation of rice husk char10.1016/j.fuel.2014.08.027 ↗
6. Superior CO2 adsorption on pine nut shell-derived activated carbons and the effective micropores at different temperatures10.1016/j.cej.2014.04.115 ↗
7. Activated carbons prepared from hydrothermally carbonized waste biomass used as adsorbents for CO210.1016/j.apenergy.2013.02.028 ↗
8. Production of microporous biochars by single-step oxidation: Effect of activation conditions on CO2 capture10.1016/j.apenergy.2013.09.058 ↗
9. Ultra-microporous adsorbents prepared from vine shoots-derived biochar with high CO2 uptake and CO2/N2 selectivity10.1016/j.cej.2018.01.092 ↗
10. CO2 adsorption at nitrogen-doped carbons prepared by K2CO3 activation of urea-modified coconut shell10.1016/j.jcis.2017.09.040 ↗
11. High-Performance Magnetic Activated Carbon from Solid Waste from Lignin Conversion Processes. 1. Their Use as Adsorbents for CO210.1021/acssuschemeng.6b02795 ↗
12. High-performance CO2 sorbents from algae10.1039/c2ra22552b ↗
13. Sustainable biomass-based carbon adsorbents for post-combustion CO2 capture10.1016/j.cej.2013.06.118 ↗
14. Selective CO2 Capture by Activated Carbons: Evaluation of the Effects of Precursors and Pyrolysis Process10.1021/acs.energyfuels.5b00470 ↗
15. Modeling of Carbon Dioxide Adsorption onto Ammonia-Modified Activated Carbon: Kinetic Analysis and Breakthrough Behavior10.1021/acs.energyfuels.5b00653 ↗
16. Effects of water vapour on CO2 capture with vacuum swing adsorption using activated carbon10.1016/j.cej.2013.06.080 ↗
17. Biogas purification by means of adsorption on pine sawdust-based activated carbon: Impact of water vapor10.1016/j.cej.2018.07.100 ↗
18. Biochar production through slow pyrolysis of different biomass materials: Seeking the best operating conditions10.1016/j.biombioe.2018.07.019 ↗
19. Evolution of the mass-loss rate during atmospheric and pressurized slow pyrolysis of wheat straw in a bench-scale reactor10.1016/j.jaap.2018.11.007 ↗
20. The role of different properties of activated carbon in CO2 adsorption10.1016/j.cej.2013.06.085 ↗
21. Development of low-cost biomass-based adsorbents for postcombustion CO2 capture10.1016/j.fuel.2009.02.025 ↗
22. The effects of CO2 activation, on porosity and surface functional groups of cocoa (Theobroma cacao)—Shell based activated carbon10.1016/j.jece.2013.06.004 ↗
23. A new MOF-505@GO composite with high selectivity for CO2/CH4 and CO2/N2 separation10.1016/j.cej.2016.09.138 ↗
24. Controllable synthesis of bifunctional porous carbon for efficient gas-mixture separation and high-performance supercapacitor10.1016/j.cej.2018.04.188 ↗
25. Utilizing transient breakthroughs for evaluating the potential of Kureha carbon for CO2 capture10.1016/j.cej.2015.01.091 ↗
26. Adsorption properties and performance of CPO-27-Ni/alginate spheres during multicycle pressure-vacuum-swing adsorption (PVSA) CO2 capture in the presence of moisture10.1016/j.ces.2015.06.064 ↗
27. Modeling of CO2 adsorption and recovery from wet flue gas by using activated carbon10.1016/j.cej.2019.03.118 ↗
28. Water adsorption on carbon—A review10.1016/j.cis.2017.10.002 ↗
29. Adsorption—Desorption Hysteresis in Relation to Capillarity of Adsorbents10.1021/j150480a006 ↗
30. Role of surface functional groups in the adsorption kinetics of water vapor on microporous activated carbons10.1021/jp070815v ↗
31. S/O-functionalities on modified carbon materials governing adsorption of water vapor10.1021/jp408716e ↗
32. Water as a potential molecular probe for functional groups on carbon surfaces10.1016/j.carbon.2013.09.057 ↗