CO₂-removal News

Top 20 Direct Air Capture Companies In 2023 

by Petya Trendafilova on, May 12, 2023

„DACCS is a preferred method of tackling excess CO2 emissions as the overall process will achieve carbon dioxide removal and be a “negative emissions technology” (NET). The industry is still nascent but there are a number of direct air capture companies that have been working on advancing DAC technology since the 2000s. The list of 20 direct air capture companies represents the top players in the sector with many more expected to enter the space to help scale the technology worldwide.“


Dong et al. (2023): Humidity sensitivity reducing of moisture swing adsorbents by hydrophobic carrier doping for CO2 direct air capture

Hao Dong, Tao Wang, Xiaobo Wang, Fengsheng Liu, Chenglong Hou, Zhengfeng Wang, Weishan Liu, Lin Fu, Xiang Gao IN: Chemical Engineering Journal 466, 143343,

The application of quaternary ammonium-based moisture-swing adsorbent provides an effective strategy for direct air capture (DAC) with low energy consumption of regeneration. This study optimized a fabrication method of shaped adsorbents and a hydrophobicity regulation method by doping polyvinylidene difluoride (PVDF).


Bach et al. (2023): Toward a consensus framework to evaluate air–sea CO2 equilibration for marine CO2 removal

Lennart T. Bach, David T. Ho, Philip W. Boyd, Michael D. Tyka IN: Limnology and Oceanography Letters,,

For CDR to be realized, CO2 must be absorbed by seawater after the deployment of a marine CDR method. However, equilibration with atmospheric CO2 takes months to years and occurs over vast ocean regions, which raises concerns about whether the atmospheric CO2 influx can be robustly verified. Here, the authors suggest a “risk assessment for incomplete CO2 equilibration” as a pragmatic way to satisfy verification requirements. They illustrate the possible resources required for such a risk assessment, propose potential verification standards, and discuss research needs. The Essay seeks to stimulate debate on how marine scientists can contribute to shaping and improving a potentially nascent marine CDR economy.


ElSayed et al. (2023): Analysing the techno-economic impact of e-fuels and e-chemicals production for exports and carbon dioxide removal on the energy system of sunbelt countries – Case of Egypt

Mai ElSayed, Arman Aghahosseini, Upeksha Caldera, Christian Breyer IN: Applied Energy 343, 121216,

Previous studies have investigated the feasibility of e-fuels and e-chemicals production for export and some carbon dioxide removal technologies in several regions. This study investigates, for the first time, the techno-economic impacts of offering such services on an exporting country’s energy system as it transitions to 100% renewable energy by 2050. Egypt is used as a representative case study for sunbelt countries with adequate land area. Four scenarios with different system configurations have been investigated using the LUT Energy System Transition Model and compared to a reference 100% domestic renewable energy system.


Singh et al. (2023): Numerical modelling of rotating packed beds used for CO2 capture processes: A review

Munendra Pal Singh, Ahmed Mongy Alatyar, Abdallah Sofiane Berrouk, Muhammad Saeed IN: In the Canadian Journal of Chemical Engineering,

The present paper has reviewed the process intensification equipment called a rotating packed bed (RPB), which is highly industry applicable due to high gravity (HiGee) force. This facilitates strong mass transfer characteristics, a compact design, and low energy consumption. In this review, the current research scenario of RPBs using numerical, computational fluid dynamics (CFD), and mathematical modelling, along with different machine learning approaches in the CO2 capture process, has been reviewed.


Zakaria et al. (2023): Production of biochar and activated carbon from oil palm biomass: Current status, prospects, and challenges

Mohd Rafein Zakaria, Mohammad Abdillah Ahmad Farid, Yoshito Andou, Irmawati Ramli, Mohd Ali Hassan IN: Industrial Crops and Products 199, 116767,

Given the lack of a precise technical definition for carbon materials and methods available, studies of biochar and activated carbon (AC) are progressively colliding with one another. Therefore, based on their respective backgrounds and methods of synthesis, their differences are outlined in this report. The present review highlights recent progress and development of biochar and AC from oil palm biomass by looking at the technical aspects of product generation and potential applications.


Now is the time to lean in on federal procurement of carbon removal

by Sasha Stashwick on Carbon180, May 10, 2023

„Over the past few years, we’ve witnessed the beginning of a genuine national commitment to carbon removal within the US climate agenda. And yet the amount of carbon removal we’ll need by mid-century is more than we can expect to build given the federal policies on the books today. In other words, we need additional policies to deliver gigatons of high-accountability, just, and durable carbon removal.“


Warum wir eine neue Endlagerdebatte brauchen

von Kurt Stukenberg auf Spiegel Online, 12.05.2023

„Die Bundesanstalt für Geowissenschaften und Rohstoffe schätzt die gesamte Speicherkapazität an Land und im Meer auf 20 bis 115 Milliarden Tonnen CO₂. Das würde reichen, um die gesamten deutschen Kohlendioxidemissionen aus dem Jahr 2022 30- bis 173-mal einzulagern. Doch politisch und juristisch sind die Hürden hoch. Noch.“


Can we fight climate change by sinking carbon into the sea?

by Alison F. Takemura on, May 11, 2023

„Hundreds of companies are pursuing a broad range of approaches, from direct air capture (deploying large machines to pull CO2 out of the air) to carbon-removal strategies that purport to harness natural systems to sequester carbon. Two Israeli companies are betting that by trapping biomass deep underwater, they can keep gigatons of CO2 out of the atmosphere.“