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Review
. 2019 Jul 24:7:525.
doi: 10.3389/fchem.2019.00525. eCollection 2019.

CO2 Capture and in situ Catalytic Transformation

Hong-Chen Fu  1   2 , Fei You  2 , Hong-Ru Li  1   2 , Liang-Nian He  2
Affiliations
Review

CO2 Capture and in situ Catalytic Transformation

Hong-Chen Fu et al. Front Chem. .

Abstract

The escalating rate of fossil fuel combustion contributes to excessive CO2 emission and the resulting global climate change has drawn considerable attention. Therefore, tremendous efforts have been devoted to mitigate the CO2 accumulation in the atmosphere. Carbon capture and storage (CCS) strategy has been regarded as one of the promising options for controlling CO2 build-up. However, desorption and compression of CO2 need extra energy input. To circumvent this energy issue, carbon capture and utilization (CCU) strategy has been proposed whereby CO2 can be captured and in situ activated simultaneously to participate in the subsequent conversion under mild conditions, offering valuable compounds. As an alternative to CCS, the CCU has attracted much concern. Although various absorbents have been developed for the CCU strategy, the direct, in situ chemical conversion of the captured CO2 into valuable chemicals remains in its infancies compared with the gaseous CO2 conversion. This review summarizes the recent progress on CO2 capture and in situ catalytic transformation. The contents are introduced according to the absorbent types, in which different reaction type is involved and the transformation mechanism of the captured CO2 and the role of the absorbent in the conversion are especially elucidated. We hope this review can shed light on the transformation of the captured CO2 and arouse broad concern on the CCU strategy.

Keywords: CO2 capture; activation; conversion; green chemistry; in situ catalysis.

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Figures

Scheme 1
Scheme 1
CCU strategy and its importance in carbon cycle.
Scheme 2
Scheme 2
Absorbents, CO2 adducts, and the resulting valuable chemicals.
Scheme 3
Scheme 3
CO2 capture and transcarboxylation in the synthesis of carbamates and ureas.
Scheme 4
Scheme 4
CO2 capture and transformation to oxazolidinones.
Scheme 5
Scheme 5
Synthesis of β-oxopropylcarbamates from propargylic alcohols and ammonium carbamates.
Scheme 6
Scheme 6
CO2 capture and Rh promoted CO2 adducts hydrogenation.
Scheme 7
Scheme 7
CO2 capture and Ru promoted CO2 adducts hydrogenation.
Scheme 8
Scheme 8
CO2 capture and Pd/AC facilitated CO2 adducts hydrogenation.
Scheme 9
Scheme 9
Cu/ZnO-Al2O3 promoted CO2 adducts hydrogenation.
Scheme 10
Scheme 10
Transcarboxylation of NHC-CO2 and NHO-CO2 adducts.
Scheme 11
Scheme 11
ILs used in CO2 capture and conversion.
Scheme 12
Scheme 12
FLPs employed in CO2 capture and transformation.
Scheme 13
Scheme 13
Homogeneous dinuclear Zn or Mg catalysts used for the production of poly(cyclohexene carbonate).
See this image and copyright information in PMC

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