Schlagwort: DACCS

Peer-reviewed Publications

Cao et al. (2024): Highly efficient direct air capture using solid–liquid phase separation in aqueous diamine solution as sorbent

Furong Cao, Soichi Kikkawa, Hidetaka Yamada, Seiji Yamazo IN: Bulletin of the Chemical Society of Japan, 97, 9, https://doi.org/10.1093/bulcsj/uoae096

In this work, a series of aqueous diamine solutions was examined for 400 ppm CO2 absorption at ambient temperature. The absorbents exhibited CO2 absorption with molar ratio of 1 molCO2/molamine, and aqueous isophorone diamine (IPDA) in particular showed >99% CO2 removal even under a 500 mL min−1 flow of 400 ppm CO2–N2 with the contact rate of 13,761.5 h−1 between CO2 and IPDA aqueous solution and the CO2 absorption rate of 4.46 mmol/L min. A precipitate of carbamic acid of IPDA was formed by reaction with CO2, and the CO2 removal efficiency was enhanced by increasing the solution viscosity by the formation of this precipitate.

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Peer-reviewed Publications

Rezo et al. (2024): A method for siting adsorption-based direct air carbon capture and storage plants for maximum CO2 removal

D. Rezo, P. Postweiler, M. Engelpracht, L. Meuleneers, N. von der Aßen IN: Carbon Neutrality, https://doi.org/10.1007/s43979-024-00100-z

To assess DACCS performance holistically, a detailed global analysis is needed that accounts for the interplay of regional ambient conditions, energy supply, and CO2 storage potential. Hence, the authors present a novel method for the optimal siting of DACCS plants derived from optimising a dynamic process model that uses global hourly weather data and regionalised data on electricity supply and CO2 storage potential. The carbon removal rate (CRR) measures the climate benefit and describes the speed at which a DACCS plant generates net negative emissions.

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Peer-reviewed Publications

Fan et al. (2024): Charged sorbents for efficient CO2 removal

Xinyi Fan, Xin Sun, Alex W. Robertson, Zhenyu Sun IN: The Innovation Materials, https://doi.org/10.59717/j.xinn-mater.2024.100088

Of further merit is the favourable electrical and thermal conductivities of the adsorbent, which are sufficiently high such that Joule heating desorption can be carried out directly, offering the opportunity to employ renewable energy sources to drive the desorption. This significantly improves the techno-economic argument and credibility for this as a viable DAC technology. The relatively low costs of the constituent material and electrolyte also point to the potential readiness for commercialization. Beyond its use in DAC, the authors’ demonstration of readily tuneable charged-sorbent materials, where the electrolyte and electrode can be rationally selected and designed, should lead to a family of new materials with applications in various energy-efficient gas separation technologies and energy conversion processes.

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Peer-reviewed Publications

Grimm et al. (2024): How Would Ideal Sorbents Improve the Technical and Economic Performance of Adsorption-Based Direct Air Capture?

Alexa Grimm, Gert Jan Kramer, Matteo Gazzani IN: Energy & Fuels, https://doi.org/10.1021/acs.energyfuels.4c01156

This study evaluates DAC performance when replacing existing sorbents with theoretical ones designed to optimize the process. In order to do so, the adsorption isotherm parameters of CO2 for different isotherm models were optimized along with process design variables to minimize energy and maximize productivity. Combining equilibrium and rate-based models, our analysis offers insights from thermodynamic, reactor, and economic perspectives.

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Peer-reviewed Publications

Kim et al. (2024): Provincial-scale assessment of direct air capture to meet China’s climate neutrality goal under limited bioenergy supply

Hanwoong Kim, Yang Qiu, Haewon McJeon, Andres Clarens, Parisa Javadi, Can Wang, Rui Wang, Jiachen Wang, Hanying Jiang, Andy Miller IN: Environmental Research Letters, DOI 10.1088/1748-9326/ad77e7

This study uses a spatially detailed integrated energy-economy-climate model to evaluate DACCS for 31 provinces in China as the country pursues its goal of climate neutrality by 2060. The authors find that DACCS could expand China’s negative emissions capacity, particularly under sustainability-minded limits on bioenergy supply that are informed by bottom-up studies. For decision-makers and the energy-economy models guiding them, the results highlight the value of expanding beyond the current reliance on biomass for negative emissions in China.

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Peer-reviewed Publications

Xu et al. (2024): Comprehensive performance evaluation of HVAC systems integrated with direct air capture of CO2 in various climate zones

Youmin Xu, Xu Han, Xiangkun Elvis Cao IN: Building and Environment, 266, 112048, https://doi.org/10.1016/j.buildenv.2024.112048

This study presents a comprehensive performance evaluation of integrating DAC in HVAC systems, which can reduce indoor CO2 concentration and improve energy efficiency of HVAC systems. The DAC equipment is modeled in Modelica based on isotherm and thermodynamic equations, and pressure drop curves of the CO2 sorbent described in literature. The model is validated with data from the literature, and then integrated into a typical HVAC system available in Modelica Buildings library.

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Peer-reviewed Publications

Titus et al. (2024): Techno-economic analysis of geothermal combined with direct and biomass-based carbon dioxide removal for high-temperature hydrothermal systems

K.A. Titus, David Dempsey, Rebecca A.M. Peer, Rosalind Archer IN: Geothermics, 125, https://doi.org/10.1016/j.geothermics.2024.103159

Here, the authors present a techno-economic comparison of renewable electricity generation coupled with either BECCS or DACCS at high-temperature, low-gas hydrothermal systems. They use a systems model that quantifies energy, carbon and financial flows through a generic hybrid power plant.

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Peer-reviewed Publications

Nayab et al. (2024): Review Analysis on Scalability of Carbon Removal Methods and Regulatory Framework for Carbon Management for Companies that sell materials to remove CO2

Tooba Nayab, Talal Ahmed, Devindi Wijekoon IN: Journal of Applied Geosciences and Engeneering, 3, https://doi.org/10.37905/jage.v3i1.25695

This article provides a comprehensive overview of various carbon capture and sequestration (CCS) technologies and approaches aimed at reducing atmospheric carbon dioxide (CO2) concentrations. It evaluates the effectiveness, costs, and potential scalability of different methods proposed by companies and research organizations worldwide. The article also examines the costs associated with these technologies and their capacity to remove significant amounts of CO2 from the atmosphere. Furthermore, it explores future pathways and frameworks for achieving gigaton-scale carbon dioxide removal, emphasizing the importance of interdisciplinary collaboration and technological innovation in addressing the urgent challenge of climate change.

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Peer-reviewed Publications

Wang & Li (2024): The impact of co-adsorbed water on energy consumption and CO2 productivity in direct air capture systems

Yongqiang Wang, Gang Kevin Li IN: Separation and Purification Technology, 354, 129415, https://doi.org/10.1016/j.seppur.2024.129415

Solid amine sorbents also adsorb a substantial amount of water from the air. However, a comprehensive understanding of how the co-adsorption of water affects the energy consumption and CO2 productivity of a DAC process has not yet been obtained. Here, employing a polyethylenimine-impregnated sorbent, the authors investigated the impact of co-adsorbed water on a temperature vacuum swing adsorption process designed for DAC.

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Peer-reviewed Publications

Sloot & Bostrom (2024): The role of framing in public support for direct air capture: A moral hazard survey experiment in the United States

Daniel Sloot, Ann Bostrom IN: Energy Research & Social Science, 116, 103694, https://doi.org/10.1016/j.erss.2024.103694

Building on previous research, the authors investigate four novel ways of framing the use of a form of carbon removal from the atmosphere that is currently of broad interest, direct air capture (DAC). They frame DAC use in terms of either necessity (DAC for limiting climate change being either essential or dependent on future mitigation) or temporality (DAC of either past or future emissions from the atmosphere). In a survey experiment with a nationally representative U.S. sample (N = 2891) the authors examined how these frames affect public support and risk perceptions in the U.S. for DAC, and the roles of prior awareness of DAC, climate change worry, and their interactions with the different frames. 

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