Tag: DACCS

Peer-reviewed Publications

Xie et al. (2024): Negative emissions technologies in energy system models and mitigation scenarios – a systematic review

Weipeng Xie, Vahid Aryanpur, Paul Deane, Hannah E. Daly IN: Applied Energy 380, 125064, https://doi.org/10.1016/j.apenergy.2024.125064

Modelled scenarios within Integrated Assessment Models and Energy Systems Models indicate that limiting global temperature rise to safe levels will require some dependence on negative emissions technologies. However, the representation of NETs varies significantly across models, leading to differences in their roles across mitigation scenarios. BECCS and DACCS are two possible solutions that are directly related to the energy system. Here, we perform a systematic review of the representation of BECCS and DACCS within ESMs and IAMs, exploring their roles in decarbonisation scenarios and identifying how NETs contribute to energy system transition pathways.

LINK

#
Peer-reviewed Publications

Ozkan et al. (2024): Advancements in cost-effective direct air capture technology

Mihrimah Ozkan, Saeb Besarati, Christopher Gordon, Gaël Gobaille-Shaw, Noah McQueen IN: Chem, https://doi.org/10.1016/j.chempr.2024.09.025

In collaboration with experts from industry leaders such as Climeworks, Carbon Capture, Mission Zero, and Heirloom, the latest developments highlight DAC technology’s potential to become a viable and sustainable solution for large-scale CO₂ removal. These advancements include reductions in energy consumption to as low as 1,055 kWh per ton of CO₂ through electrochemical methods and strategic integration of renewable energy sources like geothermal power. Additionally, economies of scale achieved through bulk purchasing and streamlined manufacturing processes have lowered DAC modules’ per-unit cost.

LINK

#
Peer-reviewed Publications

Mohan et al. (2024): Direct air capture integration with low-carbon heat: Process engineering and power system analysis

Aniruddh Mohan, Fangwei Cheng, Hongxi Luo, Chris Greig, Eric Larson, Jesse D. Jenkins IN: Energy Conversion and Management, 322, 119136, https://doi.org/10.1016/j.enconman.2024.119136

Here, the authors undertake a unique interdisciplinary study combining process engineering with a detailed macro-energy system optimization model to evaluate the system-level impacts of such plant designs in the Texas electricity system. They contrast this with using grid power to operate a heat pump to regenerate the sorbent. The analysis identifies net carbon removal costs accounting for power system impacts and resulting indirect CO2 emissions from DAC energy consumption.

LINK

#
Peer-reviewed Publications

Nature – Shorey & Abdulla (2024): Liquid solvent direct air capture’s cost and carbon dioxide removal vary with ambient environmental conditions

Patrick Shorey, Ahmed Abdulla IN: Communications Earth & Environment, 5, https://doi.org/10.1038/s43247-024-01773-1

Process models of DAC systems assume that they would operate at standard ambient temperature and pressure, when capture rates vary with ambient conditions, including temperature, relative humidity, and other factors. Here, the authors build an open-source model of a liquid solvent direct air capture technology and analyze its capture performance as a function of hourly varying ambient environmental conditions across Canada.

LINK

#
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.

LINK

#
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.

LINK

#
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.

LINK

#
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.

LINK

#
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.

LINK

#
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.

LINK

#