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Open research questions in Carbon Dioxide Capture Technologies

141 gap statements mined from Carbon Dioxide Capture Technologies papers in our 4.5M-paper local library, which holds 1,716 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • Persistent challenges remain, particularly regarding regulatory clarity, risk management, and the integration of biotechnological solutions into existing climate and energy systems. The incorporation of robust carbon accounting, certification schemes, and carbon market mechanisms emerges as a key enabler for translating technological performance into economic value and incentivizing large-scale deployment.

    Biotechnological innovations in the realm of carbon capture, storage and utilization · 2026 · DOI

  • Further experimental validation of the model is needed to confirm its accuracy. Investigation of the effect of other operating conditions, such as temperature and pressure, on oxygen permeation and combustion. Development of more advanced models that account for all possible factors affecting oxygen separation and combustion.

    Mathematical Modelling and Computational Simulation of Oxy-Combustion Carbon Capture Using Ion-Transport Membranes · 2026 · DOI

  • There is a lack of experimental data for oxyfuel combustion, particularly for annular reactor configurations. There is a need for more efficient and novel technologies for carbon capture and reduction of greenhouse gas emissions.

    Mathematical Modelling and Computational Simulation of Oxy-Combustion Carbon Capture Using Ion-Transport Membranes · 2026 · DOI

  • Future research should focus on improving the efficiency and cost-effectiveness of DAC systems. Future studies should evaluate the use of DAC systems in different greenhouse crop production systems. Future research should investigate the potential for DAC systems to reduce greenhouse-gas emissions in other industries.

    Decarbonizing desert greenhouse crop production with direct air capture–based CO2 enrichment · 2026 · DOI

  • The current method of CO2 enrichment via trucked liquid-CO2 is emissions-intensive and costly. There is a need for alternative methods of CO2 enrichment that can reduce greenhouse-gas emissions. The study identifies a gap in the literature on the use of DAC systems for CO2 enrichment in high-tech greenhouses.

    Decarbonizing desert greenhouse crop production with direct air capture–based CO2 enrichment · 2026 · DOI

  • There is a need for a comprehensive strategy to achieve carbon neutrality. The current literature on negative emission technologies has limitations, including a lack of understanding of the environmental impact of DAC-U systems.

    Scalable carbon solutions: life cycle insights and public willingness to adopt direct air capture and utilization systems · 2026 · DOI

  • The need for practical adsorbent materials that can reduce HCl exposure without generating secondary liquid waste. The lack of efficient methods to remove HCl gas. The need to balance surface oxygenation and pore preservation to improve HCl adsorption performance.

    Oxygen Plasma Functionalization of Activated Carbon Pellets for Hazardous HCl Gas Mitigation: Balancing Surface Oxygenation and Pore Preservation · 2026 · DOI

  • Material stability remains a challenge for integrated capture-conversion technology. Thermal catalytic conversion is highly dependent on green hydrogen supply and is constrained by thermodynamic equilibrium. Bioconversion has a slow process and a large land footprint.

    A Comparison of Carbon Dioxide Capture and Conversion Technologies · 2026 · DOI

  • Further studies can investigate the technical and economic feasibility of CCS implementation in other regions. Research can focus on developing more efficient and cost-effective CCS technologies.

    Analysis of CCS implementation in Indonesia’s coal fired power plants, economic optimization, and potential impact on Java-Bali grid for future decarbonization · 2026 · DOI

  • There is a need to evaluate the impact of retrofitting carbon capture and storage (CCS) technology on coal fired power plants (CFPP) in Indonesia. There is a lack of studies on the economic viability of CCS implementation and its potential impact on the Java-Bali grid for future decarbonization.

    Analysis of CCS implementation in Indonesia’s coal fired power plants, economic optimization, and potential impact on Java-Bali grid for future decarbonization · 2026 · DOI

  • The optimization of the agricultural waste supply chain remains a complex challenge. The development of efficient carbon capture technologies is necessary to combat climate change.

    A comprehensive review of agricultural waste-derived activated carbon for carbon dioxide (CO2) capture using PRISMA methodology · 2026 · DOI

  • The gap is the need for a low-cost alternative to geothermal heating. The paper identifies the limitations of geothermal energy, including regional differences in availability and cost. It also highlights the need for a feasible and ideal source of low-carbon heat for global large-scale DAC deployment.

    Design Optimization and Global Impact Assessment of Solar-Thermal Direct Air Carbon Capture · 2026 · DOI

  • The study is limited to simulations and does not include experimental validation. The study only considers a subset of MOF structures and does not evaluate all possible MOF candidates.

    Molecular diffusion enhanced performance evaluation of metal-organic frameworks for CO2 capture · 2026 · DOI

  • Despite extensive equilibrium adsorption studies, the dynamic behavior of activated carbons under fixed-bed operating conditions relevant to post-combustion CO2/N2 remains insufficiently understood, particularly for renewable materials.

    Influence of Ultramicroporosity and Surface Chemistry on Dynamic CO2 Capture in Activated Carbons · 2026

  • Future research should focus on scaling up N5-dGA production, optimizing contactor designs for ESA, and conducting extended pilot-scale demonstrations to validate long-term performance under real-world atmospheric variations, thereby accelerating the transition of this technology towards industrial implementation and its crucial role in global carbon neutrality strategies.

    Proton trap engineered electric swing adsorption for scalable and cost-effective direct air capture · 2026 · DOI

  • The need to consider co-solvation effects in the design of CO2 capture technologies.

    Implicit solvent effects on the binding interactions of amines with CO2 · 2026 · DOI

  • The need for a comprehensive analysis of implicit solvation effects on the binding interactions of amines with CO2. The lack of understanding of the role of co-solvation in CO2 capture by amine-based solvents.

    Implicit solvent effects on the binding interactions of amines with CO2 · 2026 · DOI

  • The gap in achieving intimate contact between the ceramic and molten carbonate phases is a key challenge in developing CO2-selective membranes.

    Upgrading morphological properties of ceramic-carbonate coating for high-temperature CO2 capture · 2026 · DOI

  • Effect of regeneration mode on CO2 desorption characteristics: CO2 desorption efficiency alone is insufficient for evaluating adsorbent performance.

    CO2 Desorption Characteristics of Zeolite A/X and CMS-240 under Thermal, Vacuum and CH4 Purging Regeneration Conditions · 2026 · DOI

  • It should be noted that although FTIR, XRD, and porestructure analysis support the successful loading and partial pore confinement of [EMIm]Asn, direct evidence for the spatial distribution of the ionic liquid within UiO-66 particles is still lacking.

    Amino acid ionic liquid-impregnated functionalized UiO-66 for CO2 capture: effects of surface functional groups on adsorption performance · 2026 · DOI

  • The paper highlights the need for more efficient and cost-effective DAC systems. The paper identifies the challenge of scaling up the moisture-driven DAC system to larger sizes.

    Design and Demonstration of a Direct Air Capture System with Moisture-Driven CO2 Delivery into Aqueous Medium · 2026 · DOI

  • Limited capture efficiency of current technologies. Material stability of integrated capture-conversion technology.

    A Comparison of Carbon Dioxide Capture and Conversion Technologies · 2026 · DOI

  • Editorial summary: Oxygen vacancies are key active sites for CO₂ conversion, but enhancing their activity and stability under harsh conditions is rarely explored.

    Single Ce atom-assisted oxygen vacancies as active and stable sites for CO2 conversion · 2026 · DOI

  • On the other hand, introducing specific functional groups-particularly pyridinic and pyrrolic nitrogen-effectively bridges the gap between physical adsorption capacity and chemical selectivity. These groups modulate adsorption strength and gas selectivity through Lewis acid–base interactions, hydrogen bonding, and van der Waals forces.

    Recent advances in the development of engineered biochar for CO2 adsorption: Research on heteroatom-doped biochar · 2026 · DOI

  • The study does not address the price of AER, - Higher water uptake can cause exceeding the carrying capacity of the conveyor, - Low adsorption rates lead to higher energy usage of the conveyor system, - The study does not provide a direct comparison with other DAC…

    Design and Demonstration of a Direct Air Capture System with Moisture-Driven CO2 Delivery into Aqueous Medium · 2026 · DOI

Most-cited papers in Carbon Dioxide Capture Technologies

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Open questions raised by papers listed on this page include: (1) Further experimental validation of the model is needed to confirm its accuracy (“Mathematical Modelling and Computational Simulation of Oxy-Combustion Carbon…”, 2026); (2) Future research should focus on improving the efficiency and cost-effectiveness of DAC systems (“Decarbonizing desert greenhouse crop production with direct air capture–based…”, 2026); (3) There is a need for a comprehensive strategy to achieve carbon neutrality (“Scalable carbon solutions: life cycle insights and public willingness to adopt…”, 2026); (4) There is a need to evaluate the impact of retrofitting carbon capture and storage (CCS) technology on coal fired power plants (CFPP) in Indonesia (“Analysis of CCS implementation in Indonesia’s coal fired power plants, economic…”, 2026); (5) The lack of understanding of the role of co-solvation in CO2 capture by amine-based solvents (“Implicit solvent effects on the binding interactions of amines with CO2”, 2026). 141 gap statements have been mined from Carbon Dioxide Capture Technologies papers in our 4.5M-paper local library, which holds 1,716 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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