CO2 Capture and in situ Catalytic Transformation

Abstract

The escalating rate of fossil fuel combustion contributes to excessive CO 2 emission and the resulting global climate change has drawn considerable attention. Therefore, tremendous efforts have been devoted to mitigate the CO 2 accumulation in the atmosphere. Carbon capture and storage (CCS) strategy has been regarded as one of the promising options for controlling CO 2 build-up. However, desorption and compression of CO 2 need extra energy input. To circumvent this energy issue, carbon capture and utilization (CCU) strategy has been proposed whereby CO 2 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 CO 2 into valuable chemicals remains in its infancies compared with the gaseous CO 2 conversion. This review summarizes the recent progress on CO 2 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 CO 2 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 CO 2 and arouse broad concern on the CCU strategy.

Copper(II) invigorated EHU-30 for continuous electroreduction of CO2 into value-added chemicals

“…CO 2 emissions are a major environmental concern which can be mitigated in the near future if efficient capture, storage and revalorization solutions are developed 1 , 2 . In this context, the conversion of CO 2 into useful chemicals and fuels implies an appealing solution that could potentially pave the transition to a low-carbon economy 3 , 4 . The conversion process can be conducted by thermochemical, photochemical, biochemical and electrochemical methods 5 , 6 .…”

Heterogeneous catalysts for the hydrogenation of amine/alkali hydroxide solvent captured CO2 to formate: A review

“…42 There are a few outstanding review papers available in open literature focusing on the rational design and mechanistic insights of homogeneous catalysts for integrated CO 2 capture and hydrogenation to formate. 43,69 Even though the development and application of heterogeneous catalysts lagged significantly due to the poor reactivity and stability, researchers have devoted their focus to the exploration of efficient heterogeneous catalysts in recent years owing to their apparent benefit of easy separation and reuse. In the following sections, we will focus on the catalytic performance of a wide range of heterogeneous catalysts for the hydrogenation of captured CO 2 in aqueous amine and alkali-metal hydroxide solutions to produce FA/formate to rationalize the catalytic performance with catalyst properties like electronic state and dispersion.…”

Recent Progress with Pincer Transition Metal Catalysts for Sustainability

“…Hydrogen release from methanol, as well as from formic acid, should be envisioned as part of a wider concept including CO 2 capture and recycling [306,307]. Green hydrogen produced via water electrolysis using e.g., wind-or solar energy can sustain the inverse process of CO 2 hydrogenation to methanol, formic acid, or any favorable LOHC, closing an ideal CO 2 -free energy production cycle [308][309][310][311][312][313][314]. The dehydrogenation of alcohols in a hydrogen economy perspective has been well-reviewed in the last 10 years by many authors, providing a comprehensive overview of the many possibilities offered by homogeneous catalysis, including pincer-type catalysis [289][290][291][292][293].…”

“…Green hydrogen produced via water electrolysis using e.g. wind-or solar energy can sustain the inverse process of CO2 hydrogenation to methanol, formic acid, or any favorable LOHC, closing an ideal CO2-free energy production cycle [308][309][310][311][312][313][314].…”