Green, safe, fast, and inexpensive removal of CO 2 from aqueous KHCO 3 solutions using a nanostructured catalyst TiO(OH) 2

A milestone toward truly low-cost CO 2 capture that can ease implementation of the Paris Agreement

Sam Q Toan, Qinghua Lai, William O'Dell, Zhao Sun, Huiping Song, Ying Zhao, Maciej Radosz, Hertanto Adidharma, Christopher Russell, Hongbao Yao, Yujun Wang, Weiyang Fei, Maohong Fan

Research output: Contribution to journalArticle

Abstract

With great effort, the Paris Agreement set goals designed to address climate change, but far more effort will be necessary to meet those goals due to the lack of transformational CO 2 capture technologies that are cost-effective. This research is designed to overcome the shortcomings of conventional CO 2 capture technologies (i.e. the cost, health impacts, and environmental impacts of amines) by using a titanium oxyhydroxide (TiO(OH) 2 ) catalyst and a potassium carbonate/bicarbonate sorbent (K 2 CO 3 /KHCO 3 , respectively). Nanostructured TiO(OH) 2 as a catalyst is able to accelerate desorption processes; the acceleration of CO 2 desorption is of greater significance because the process consumes more energy than the sorption process. Experimental results show that the use of nanostructured TiO(OH) 2 increases the amounts of desorbed CO 2 by as much as 1200%, if not higher. Cyclic sorption-desorption testing combined with material characterization shows that both catalyst and sorbent are stable even after 50 cycles. One major benefit of the kinetic enhancement from this catalyst/sorbent system is the reduction of temperature needed to desorb CO 2 ; waste heat may be sufficient to provide all or most of the energy required for CO 2 capture. Thus, the energy cost of CO 2 capture will be significantly reduced, which may keep electricity prices low, avoiding a decrease in the global economy in order to avert global climate change impacts. Another significant benefit of this system is that this inorganic system is environmentally safe, clean, and non-carcinogenic.

Original languageEnglish (US)
Pages (from-to)508-512
Number of pages5
JournalNano Energy
Volume53
DOIs
StatePublished - Nov 1 2018

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Carbon Monoxide
Sorbents
Desorption
Catalysts
Climate change
Sorption
Costs
Potash
Waste heat
Environmental impact
Amines
Electricity
Titanium
Health
Kinetics
Fast Green
Testing
Bicarbonates
Temperature

Keywords

  • Carbon capture
  • Carbon dioxide
  • Catalyst
  • Nanostructured
  • Potassium carbonate
  • Titanium oxy hydroxide

Cite this

Green, safe, fast, and inexpensive removal of CO 2 from aqueous KHCO 3 solutions using a nanostructured catalyst TiO(OH) 2 : A milestone toward truly low-cost CO 2 capture that can ease implementation of the Paris Agreement. / Toan, Sam Q; Lai, Qinghua; O'Dell, William; Sun, Zhao; Song, Huiping; Zhao, Ying; Radosz, Maciej; Adidharma, Hertanto; Russell, Christopher; Yao, Hongbao; Wang, Yujun; Fei, Weiyang; Fan, Maohong.

In: Nano Energy, Vol. 53, 01.11.2018, p. 508-512.

Research output: Contribution to journalArticle

Toan, Sam Q ; Lai, Qinghua ; O'Dell, William ; Sun, Zhao ; Song, Huiping ; Zhao, Ying ; Radosz, Maciej ; Adidharma, Hertanto ; Russell, Christopher ; Yao, Hongbao ; Wang, Yujun ; Fei, Weiyang ; Fan, Maohong. / Green, safe, fast, and inexpensive removal of CO 2 from aqueous KHCO 3 solutions using a nanostructured catalyst TiO(OH) 2 : A milestone toward truly low-cost CO 2 capture that can ease implementation of the Paris Agreement. In: Nano Energy. 2018 ; Vol. 53. pp. 508-512.
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AU - Lai, Qinghua

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AU - Adidharma, Hertanto

AU - Russell, Christopher

AU - Yao, Hongbao

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AU - Fei, Weiyang

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AB - With great effort, the Paris Agreement set goals designed to address climate change, but far more effort will be necessary to meet those goals due to the lack of transformational CO 2 capture technologies that are cost-effective. This research is designed to overcome the shortcomings of conventional CO 2 capture technologies (i.e. the cost, health impacts, and environmental impacts of amines) by using a titanium oxyhydroxide (TiO(OH) 2 ) catalyst and a potassium carbonate/bicarbonate sorbent (K 2 CO 3 /KHCO 3 , respectively). Nanostructured TiO(OH) 2 as a catalyst is able to accelerate desorption processes; the acceleration of CO 2 desorption is of greater significance because the process consumes more energy than the sorption process. Experimental results show that the use of nanostructured TiO(OH) 2 increases the amounts of desorbed CO 2 by as much as 1200%, if not higher. Cyclic sorption-desorption testing combined with material characterization shows that both catalyst and sorbent are stable even after 50 cycles. One major benefit of the kinetic enhancement from this catalyst/sorbent system is the reduction of temperature needed to desorb CO 2 ; waste heat may be sufficient to provide all or most of the energy required for CO 2 capture. Thus, the energy cost of CO 2 capture will be significantly reduced, which may keep electricity prices low, avoiding a decrease in the global economy in order to avert global climate change impacts. Another significant benefit of this system is that this inorganic system is environmentally safe, clean, and non-carcinogenic.

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