Article
Thermodynamics
W. Liu, Y. C. Lin, Y. Ji, J. Y. Yong, X. J. Zhang, L. Jiang
Summary: This study provides a comparative assessment of direct air capture (DAC) using five different adsorbents. It analyzes the working capacity and exergy efficiency of DAC cycles using vacuum-pressure swing adsorption (VPSA) and temperature vacuum swing adsorption (TVSA). The results show that TVSA is a promising process for DAC, and amine-modified adsorbents perform better than metal-organic frameworks in most situations.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Chen Zhang, Shuzhuang Sun, Su He, Chunfei Wu
Summary: Direct air capture (DAC) of CO2 is considered a promising method for reducing carbon dioxide concentration and mitigating climate change. This study focused on using KOH-activated bamboo biochar as an adsorbent for DAC, which showed a high CO2 capture capacity and stability at low humidity. However, the biochar activity for CO2 capture decreased under high humidity conditions.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Review
Thermodynamics
L. Jiang, W. Liu, R. Q. Wang, A. Gonzalez-Diaz, M. F. Rojas-Michaga, S. Michailos, M. Pourkashanian, X. J. Zhang, C. Font-Palma
Summary: Direct air capture (DAC) is gaining momentum as a promising carbon capture technology due to its vast potential and flexibility in collecting CO2 from discrete sources. This paper comprehensively discusses the state-of-the-art of DAC and CO2 utilization, highlights unresolved technical challenges, and provides perspectives for commercial large-scale applications.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2023)
Editorial Material
Chemistry, Physical
Thien S. Nguyen, Cafer T. Yavuz
Summary: Temperature swing adsorption or absorption-based CO2 capture requires a lot of energy, but utilizing solar energy for desorption and natural cooling can significantly reduce energy costs.
Article
Engineering, Chemical
Jennifer L. Wade, Horacio Lopez Marques, Winston Wang, Justin Flory, Benny Freeman
Summary: Direct Air Capture is a necessary approach to reduce carbon emissions and limit global warming, and recent advancements in carbon dioxide membrane separation using water vapor gradient have shown promising results. This study demonstrates the potential of using commercial anion exchange membranes driven solely by a water vapor gradient to continuously pump CO2 from air.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
John-Timothy Anyanwu, Yiren Wang, Ralph T. Yang
Summary: Amine grafting under hydrous conditions using hierarchical bimodal mesoporous silica has shown promising results in developing adsorbents with high amine loading and superior CO2 capture performance. The diffusional properties of the hierarchical bimodal silica supports contribute to greater amine dispersion and utilization, resulting in significantly higher CO2 adsorption capacity and amine efficiency compared to traditional SBA-15 type adsorbents. Wet grafted hierarchical bimodal silica demonstrated excellent cyclic stability and breakthrough capacity, making it a promising candidate for CO2 capture from ambient air and industrial gas streams.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Juliane Weber, Vitalii Starchenko, Ke Yuan, Lawrence M. Anovitz, Anton V. Ievlev, Raymond R. Unocic, Albina Y. Borisevich, Matthew G. Boebinger, Andrew G. Stack
Summary: This study presents experimental results on the reaction of magnesium oxide (MgO) with the atmosphere, revealing a substantial slowdown of the initial fast reaction due to surface passivation. Short-term experiments show rapid hydroxylation, carbonation, and formation of hydrated magnesium carbonate, highlighting the importance of reactive site density for carbonation kinetics.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Zisheng Zhang, Amanda L. Kummeth, Jenny Y. Yang, Anastassia N. Alexandrova
Summary: Aqueous direct air capture (DAC) is a vital technology for achieving a carbon negative infrastructure. This study analyzes the CO2 absorption chemistries on different molecular systems and performs inverse molecular design to find the optimal sorbent. The results show that alkoxides and phenoxides are more suitable for aqueous DAC than amines, and all three systems follow a linear scaling relationship. High-performance alkoxides and off-LSR phenoxides are proposed through computational screening and genetic algorithm. The experimental validation confirms the trend and behavior of pK(CO2)-pK(a).
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Review
Engineering, Environmental
Roberto Castro-Munoz, Mohd Zamidi Ahmad, Magdalena Malankowska, Joaquin Coronas
Summary: Since carbon dioxide (CO2) is the primary greenhouse gas emitted into the atmosphere due to human activities, research efforts have been focused on capturing and reducing its production. Direct air capture (DAC) using sorbents has been explored as a promising alternative, but gas separation membranes are also being considered. This paper provides a perspective on the ongoing research and attempts of DAC applications via membrane separation and introduces the main materials and types used for CO2 separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Chae Jeong-Potter, Monica Abdallah, Cory Sanderson, Mark Goldman, Raghubir Gupta, Robert Farrauto
Summary: This study investigates a dual function material (DFM) consisting of 1% Ru, 10% Na2O/gamma -Al(2)O(3) for combined direct air capture (DAC) of CO2 and catalytic methanation. The DFM exhibits high CO2 adsorption capacity and rates at ambient conditions and can be successfully converted to renewable natural gas through catalytic methanation. The study also explores adsorption under humid conditions and highlights the importance of flowrate in future reactor design.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Yihe Miao, Zhijun He, Xuancan Zhu, David Izikowitz, Jia Li
Summary: The research revealed that the CO2 adsorption selectivity of polyethylenimine-loaded mesoporous silica decreases with reduced adsorption temperatures below 15 degrees C. Additionally, a polyamine loading of 50 wt% in tetraethylenepentamine-loaded mesoporous silica exhibits an outstanding capture capacity of 2.30 mmol CO2/g in a wide range of adsorption temperatures under simulated air. Furthermore, the Avrami model could provide a robust prediction for the adsorption and desorption kinetics of polyamine-loaded mesoporous silica even at low temperatures.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Chen Zhang, Shuzhuang Sun, Shaojun Xu, Chunfei Wu
Summary: This study investigates the effects of relative humidity and biochar activation on CO2 capture. The findings show that biochar activated by KOH has a high CO2 capture capacity, and both relative humidity and CO2 concentration decrease negatively impact the capture ability of biochar.
BIOMASS & BIOENERGY
(2022)
Article
Engineering, Chemical
Abishek Kasturi, Gyoung Gug Jang, Adeola Dona-Tella Akin, Amiee Jackson, Jiheon Jun, Diana Stamberga, Radu Custelcean, David S. Sholl, Sotira Yiacoumi, Costas Tsouris
Summary: The development of a cost-effective, corrosion resistant, high-flux direct air capture (HiDAC) contactor for a solvent-based direct air capture (DAC) process is reported. The HiDAC contactor has a high specific surface area, resistance to corrosion, and high wettability, making it well suited for DAC.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Lei Wang, Yanyang Gao, Jianmin Luo, Xiaoxing Wang, Richard Davis, Jianjia Yu, Dongsen Mao, Fangqin Cheng, Yun Hang Hu, Sam Toan, Maohong Fan
Summary: A novel DAC technology using lysine and N-doped 3D graphene catalyst has been developed, which significantly improves CO2 absorption efficiency and working time, and accelerates desorption rate. This research provides a new strategy for developing next-generation DAC technologies.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Song Gao, Kyle Pittman, Scott Edmundson, Michael Huesemann, Mattias Greer, William Louie, Peter Chen, David Nobles, John Benemann, Braden Crowe
Summary: Large-scale microalgal biomass production faces challenges in obtaining concentrated CO2 as the carbon source. By utilizing the enhanced CO2 mass transfer in alkaline media, carbon can be directly captured from the ambient air and used by algae. This study isolated a cyanobacterial strain that showed promising growth under alkaline conditions and demonstrated its potential for biomass production using air CO2 as the carbon source.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Francisco Vidal Vazquez, Joonas Koponen, Vesa Ruuskanen, Cyril Bajamundi, Antti Kosonen, Pekka Simell, Jero Ahola, Christian Frilund, Jere Elfving, Matti Reinikainen, Niko Heikkinen, Juho Kauppinen, Paolo Piermartini
JOURNAL OF CO2 UTILIZATION
(2018)
Article
Chemistry, Multidisciplinary
Cyril Jose E. Bajamundi, Joonas Koponen, Vesa Ruuskanen, Jere Elfving, Antti Kosonen, Juho Kauppinen, Jero Ahola
JOURNAL OF CO2 UTILIZATION
(2019)
Article
Engineering, Environmental
Jere Elfving, Juho Kauppinen, Mikko Jegoroff, Vesa Ruuskanen, Lauri Jarvinen, Tuomo Sainio
Summary: Comparison of regeneration options for direct air capture shows that using TVSA with air or inert gas purge flow leads to better regeneration efficiency. Lower temperatures result in better regeneration performance, with TVSA coupled with mild vacuum showing lower cyclic capacity decrease rate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Vesa Ruuskanen, Georgy Givirovskiy, Jere Elfving, Petteri Kokkonen, Aku Karvinen, Lauri Jarvinen, Jani Sillman, Miika Vainikka, Jero Ahola
Summary: The rapid growth of human population is causing concerns about food security, while conventional agriculture is contributing to environmental pollution and greenhouse gas emissions. Edible microbial biomass is seen as a promising alternative with lower environmental impact for boosting food production. The Neo-Carbon Food concept introduces a hybrid biological-inorganic process for microbial biomass production, utilizing hydrogen production, direct air capture of CO2, and assimilation by hydrogen-oxidizing bacteria.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Jere Elfving, Tuomo Sainio
Summary: The study proposed a kinetic model based on reaction mechanisms of CO2 adsorption on supported amines, providing more accurate predictions of the adsorption process under humid conditions. The kinetic model successfully captured the enhancement of CO2 adsorption capacity by humidity, and thus has potential applications in simulating the DAC process.
CHEMICAL ENGINEERING SCIENCE
(2021)
Proceedings Paper
Green & Sustainable Science & Technology
Jere Elfving, Cyril Bajamundi, Juho Kauppinen
13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13
(2017)