CO₂-removal News

Yi et al. (2024): Review on Advances and Prospectives of Direct Air Capture: Thermodynamic Verification, Optimized Material Selection, and Technical Economic Assessment for the Application

Chao Yi, Bin Guan, Zhongqi Zhuang, Junyan Chen, Jiangfeng Guo, Yujun Chen, Zeren Ma, Chenyu Zhu, SiKai Zhao, Hongtao Dang, Lei Chen, Kaiyou Shu, Yuan Li, Kuangyi Shi, Zelong Guo, Jingqiu Hu, Xuehan Hu, Zhen Huang IN: Industrial & Engineering Chemistry Research,

This paper first summarizes the different systems DAC can deal with, such as gas/solid, gas/liquid, and gas/polymer systems, and then illustrates the thermodynamic feasibilities of DAC under each condition. From a perspective of industrial practice, the review presents several hopeful chemical technologies from many aspects including capturing material, process flow, and techno-economic analysis, with contents allocated by the maturity of the technology. This review especially analyzes demonstration plants like Climeworks and explores experiences about how to transform early laboratory results based on unit operation into large-scale production. 


Li et al. (2024): Carbon sequestration effects in cementitious composite binder materials under accelerated carbonation: A review

Shaochun Li, Xu Chen, Mengjun Hu, Yongjuan Geng, Shiyu Sui, Shuling Meng, Ling Jin, Weijiu Cui IN: Materials Today Sustainability, 25, 100663,

This paper reviews the latest research progress on the carbon sequestration effects of cement-based binder composite materials under accelerated carbonation methods. It provides a detailed exploration of the influence of cement, admixtures, and additives on the accelerated carbonation outcomes of binding materials. The paper discusses the carbonation capacity of composite binding systems, identifies existing issues, and explores future developments. The aim is to provide practical insights that can enhance the carbon sequestration capability of cement-based binder composite materials. This paper can serve as a technical reference for the construction industry to achieve the goal of “low-carbon emission“ through the utilization of accelerated carbonation technology.


Domene & Crawford (2024): Dynamic analysis of a floating wind turbine platform with on-board CO2 direct air capture

Gerard Avellaneda Domene, Curran Crawford IN: Ocean Engineering 308, 118205,

Offshore wind-powered CO2 direct air capture coupled with deep-water, submarine basalt reservoirs has the potential to offer a reliable way to permanently store CO2 while avoiding grid-energy and land-use competition. This paper analyzes the incorporation of a DAC system into a reference floating wind turbine (FWT) concept, the IEA 15 MW RWT atop the UMaine VolturnUS-S semi-submersible. 


Renforth et al. (2024): Carbon dioxide removal could result in the use of lower-grade iron ore in a decarbonized net-negative emission steel industry

Renforth P., Campbell J., Foteinis S., Cosgun E., Young J., Strunge T., Riley A.L., Mayes W.M., van der Spek M.W. IN: Journal of Cleaner Production, 142987,

Reducing the emissions from steel production is essential in meeting climate targets while maintaining economic prosperity. Here, the authors show that applying deep emissions mitigation to the steel industry together with the reaction of by-product slag with atmospheric carbon dioxide could result in a carbon negative industry on the order of up to a GtCO2 yr-1 by mid-century.


Enayatizadeh et al. (2024): Cryogenic carbon capture design through CO2 anti-sublimation for a gas turbine exhaust: Environmental, economic, energy, and exergy analysis

Hossein Enayatizadeh, Alireza Arjomand, Tero Tynjälä, Eero Inkeri  IN: Energy, 132244,

In this study, we present a novel multigeneration system that produces power, cooling, and solid carbon dioxide by applying cryogenic carbon capture to a gas turbine flue gas. The energy recovery concept is efficiently employed to avoid energy and exergy losses in the system. The system is simulated in Aspen Plus with the mathematical models of the exergy streams and solid-vapor equilibrium written in Matlab. The performance of the plant is assessed based on energy, exergy, economic, and environmental evaluations.


Hu et al. (2024): Assessing the future impact of 12 direct air capture technologies

Yongxin Hu, Rafiqul Gani, Kai Sundmacher, Teng Zhou IN: Chemical Engineering Science, 298,

This article conducts a comparative analysis of the CO2 emissions of 12 state-of-the-art DAC technologies. The evaluations consider regional (EU, USA, and China) and temporal (years 2023, 2030, and 2050) energy supply variations.


Acen et al. (2024): The complementary role of carbon dioxide removal: A catalyst for advancing the COP28 pledges towards the 1.5 °C Paris Agreement target

Caroline Acen, Olusola Bamsiile, Dongsheng Cai, Chiagoziem C. Ukwuoma, Sandra Obiora, Qi Huang, Dilber Uzun, Humphrey Adun IN: Science of The Total Environment,

The role of carbon dioxide removals (CDRs) has become crucial in achieving climate targets, especially in the context of achieving net zero emissions by mid-century and removing residual emissions post-mid-century. This paper assesses the impact of these policies on emissions, energy structure, land use, and global warming temperature.


Schwinger et al. (2024): On the emission-path dependency of the efficiency of ocean alkalinity enhancement

Jörg Schwinger, Timothée Bourgeois, Wilfried Rickels IN: Environmental Research Letters,

The chemical efficiency of OAE (the amount of CO2 sequestered per unit of alkalinity added) depends, among other factors, on the background state of the surface ocean, which will significantly change until the end of this century and beyond. Here, the authors investigate the consequences of such changes for the long-term efficiency of OAE. Our results suggest that the assumption of a constant, present-day chemical efficiency of OAE in integrated assessment modelling and carbon credit assignments could lead to economically inefficient OAE implementation pathways.


Karunarathne et al. (2024): Review on CO2 removal from ocean with an emphasis on direct ocean capture (DOC) technologies

Sumudu Karunarathne, Sara Andrenacci, Andres Carranza-Abaid, Chameera Jayarathna, Michel Maelum, Ragnhild Skagestad, Hans Aksel Haugen IN: Separation and Purification Technology,

Recent developments focus on maturing promising Carbon Dioxide Removal (CDR) technologies that remove and permanently store CO2. This article specifically examines a subset of CDR technologies referred to as ocean-based negative emission technologies (ONETs). The technologies under review involve modifications to seawater chemistry aimed at maximizing the ocean’s potential as a CO2 sink. Specifically, electrochemical ocean capture (EOC) and ocean alkalinity enhancement (OAE) are discussed.


Oppon et al. (2024): Sustainability performance of enhanced weathering across countries: A triple bottom line approach

Eunice Oppon, S.C. Lenny Koh, Rafael Eufrasio IN: Energy Economicy, 136,

There is limited research about the broad sustainability impacts in rolling enhanced weathering (EW) on a large scale. This research assesses the triple bottom line sustainability of EW in eight top-emitting countries using an extended input-output model.