Article
Thermodynamics
Rujie Wang, Shanshan Liu, Qiangwei Li, Shihan Zhang, Lidong Wang, Shanlong An
Summary: Blended amine solvents, comprising N,N-dimethylcyclohexylamine (DMCA) and N-methylcyclohexyamine (MCA), showed rapid absorption rate, large CO2 capacity, and efficient regeneration for CO2 capture. The total mass transfer coefficient of CO2 in DMCA-MCA was higher than that of 5 M MEA, and the total regeneration energy of DMCA-MCA blend was significantly lower than 5 M MEA. This novel solvent could be a potential alternative for CO2 capture.
Article
Chemistry, Multidisciplinary
Alexey A. Orlov, Alain Valtz, Christophe Coquelet, Xavier Rozanska, Erich Wimmer, Gilles Marcou, Dragos Horvath, Benedicte Poulain, Alexandre Varnek, Frederick de Meyer
Summary: Researchers have developed a computational approach that combines kinetic experiments, molecular simulations, and machine learning to identify a class of tertiary amines that absorb CO2 faster than a typical commercial solvent when mixed with piperazine.
COMMUNICATIONS CHEMISTRY
(2022)
Article
Engineering, Chemical
Jayangi D. Wagaarachchige, Zulkifli Idris, Ayandeh Khatibzadeh, Audun Drageset, Klaus-J. Jens, Maths Halstensen
Summary: Solvent management is a critical challenge in PCC technology development. The study demonstrates the use of multivariate methods and spectroscopy to monitor and control the process performance. It also shows a new principle for long-term solvent monitoring and thermal solvent reclaiming.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Guilherme L. P. Aydos, Graciane Marin, Guenter Ebeling, Francisco P. dos Santos, Barbara C. Leal, Rafael D. Zink, Brenda A. Vargas, Pedro Migowski, Rafael Stieler, Bruno B. de Araujo, Paulo Goncalves, Hubert K. Stassen, Leonardo dos Santos Pereira, Ana Paula Musse, Jairton Dupont
Summary: The covalent attachment of 3- or 4-hydroxy benzene to the 1,3-dimethylimidazolium cation results in zwitterions, which can chemisorb and physisorb carbon dioxide in aqueous solutions. These zwitterionic solutions have low enthalpy of absorption, high adsorption capacity, and can be recycled multiple times.
Article
Green & Sustainable Science & Technology
Patrick Brandl, Mai Bui, Jason P. Hallett, Niall Mac Dowell
Summary: Absorption-based separation processes are crucial for deep decarbonisation, but the anticipated cost reduction has not been achieved. Previous research focused on developing novel aqueous blends of amines, which failed to address the issue of high water content in solvents. This study presents a thought-experiment using a hypothetical solvent to determine the limit of cost reduction.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Chemistry, Multidisciplinary
Gabor Kozma, Andrea Ronavari, Zoltan Konya, Akos Kukovecz
Summary: Mechanochemistry provides a versatile method to synthesize metal oxides, and the progress of the reaction can be monitored and calculated based on the measured pressure increase. However, there can be unexpected complexity in the pressure function, potentially caused by the capture and release of CO2. Experimental evidence supports this hypothesis and highlights the need to avoid oversimplifying pressure-based conversion calculations in mechanochemical processing.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Energy & Fuels
Omar A. Carrasco-Jaim, Haojun Xia, Upali P. Weerasooriya, Ryosuke Okuno
Summary: For the first time, a surface-active amine was used for CO2 capture and in-situ conversion into bicarbonate. Analysis of the CO2 capture capacity data with NMR spectroscopy revealed the influence of PO groups on CO2 solubility, solution pH, and steric effect, establishing the mechanism of bicarbonate generation. The results demonstrated a 54% enhancement in bicarbonate generation under ambient conditions with the optimal PO level (DMAPA-6PO) compared to DMAPA.
Article
Energy & Fuels
Xiaomei Wu, Yuanhao Mao, Huifeng Fan, Sayd Sultan, Yunsong Yu, Zaoxiao Zhang
Summary: In this study, traditional primary amine, secondary amine and tertiary amine were blended with EDA to improve the corrosiveness and Cu cycling performance of EDA in electrochemical CO2 capture. The results showed that the 50/50 EDA/MEA mixed solution had high CO2 capacity and fast absorption rate, making it a potential substitute for traditional EDA solvent.
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)
Article
Engineering, Environmental
Chuanyu Yan, Abdelhamid Sayari
Summary: One of the most critical challenges in applying amine-based CO2 adsorbents on a large scale is their long-term stability and oxidative degradation. In this study, the oxidation of polyethylenimine (PEI) was investigated using various analysis techniques, and the presence of radical species and their increase in the presence of transition metal catalysts were observed for the first time. Significant amounts of CO2, water, and ammonia were also detected. Surprisingly, although epoxybutane (EB) and polyvinyl alcohol (PVA) improved the oxidation resistance of PEI, they did not reduce the amount of radical species. Theoretical calculations suggested that PEI is more prone to oxidation due to its weaker C-H bonds. The findings provide insights into the oxidation and antioxidation mechanisms of amines and offer clues for further improvement.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yanjie Xu, Tao Wang, Qi Yang, Hai Yu, Mengxiang Fang, Graeme Puxty
Summary: A range of water-lean solutions blended from diamines, organic solvent diluents, and water were examined to reduce energy penalties. Some diamines were found to remain homogenous during CO2 uptake, showing low viscosity and rapid absorption and desorption rates.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Xianfeng Wang, Zhenghong Bao, Novruz G. Akhmedov, David Hopkinson, James Hoffman, Yuhua Duan, Adefemi Egbebi, Kevin Resnik, Bingyun Li
Summary: This study reports an amino acid-based nanotechnology that can absorb and convert CO2 from simulated flue gases into new nanomaterials. The technology offers a first-of-its-kind system that provides three flexible, switchable product pathways for CO2 capture and offers faster kinetics and higher CO2 absorption capacity compared to state-of-the-art technologies.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Engineering, Chemical
Ismail I. I. Alkhatib, Amparo Galindo, Lourdes F. Vega
Summary: Aqueous amines technology is mature for large-scale CO2 capture, but high energy regeneration remains a drawback. Water-free and water-lean solvents are attractive alternatives to reduce regeneration energy, with ethylene glycol showing promise as a co-solvent for minimizing CO2 solubility reduction and decreasing enthalpy of absorption. Systematic studies on the effect of co-solvent on thermodynamic properties for optimizing the separation process are needed.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Zhen Chen, Bingling Yuan, Guoxiong Zhan, Yuchen Li, Jinyang Li, Jianjun Chen, Yue Peng, Lidong Wang, Changfu You, Junhua Li
Summary: A promising alternative physical solvent for CO2 capture was developed, with optimal composition of polyamine and physical solvent. The study conducted orthogonal tests to evaluate mass transfer kinetics and crucial conditions, showing that the physical solvent NHD has a weak effect on mass transfer.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Mengran Li, Erdem Irtem, Hugo-Pieter Iglesias Van Montfort, Maryam Abdinejad, Thomas Burdyny
Summary: Integrating CO2 electrolysis with CO2 capture offers the potential for energy reductions. However, to ensure energy benefits, the integrated electrolyser must achieve similar performance to the gas-fed electrolyser.
NATURE COMMUNICATIONS
(2022)
Article
Biochemical Research Methods
Lauren Ford, Robert L. Henderson, Christopher M. Rayner, Richard S. Blackburn
JOURNAL OF CHROMATOGRAPHY A
(2017)
Article
Polymer Science
Guillaume Raynel, Debora Salomon Marques, Tulay Yilmaz Inan, Qasim Saleem
POLYMER DEGRADATION AND STABILITY
(2017)
Article
Chemistry, Applied
Lauren Ford, Christopher M. Rayner, Richard S. Blackburn
Article
Energy & Fuels
Diarmaid S. Clery, Patrick E. Mason, Christopher M. Rayner, Jenny M. Jones
Article
Green & Sustainable Science & Technology
Xujun Luo, Jonathan White, Richard Thompson, Christopher Rayner, Balazs Kulik, Algy Kazlauciunas, Weidong He, Long Lin
JOURNAL OF CLEANER PRODUCTION
(2018)
Article
Chemistry, Applied
Muhammad H. Wathon, Nicholas Beaumont, Meryem Benohoud, Richard S. Blackburn, Christopher M. Rayner
COLORATION TECHNOLOGY
(2019)
Article
Green & Sustainable Science & Technology
Diarmaid S. Clery, Patrick E. Mason, Douglas C. Barnes, Janos Szuhanszki, Muhammad Akram, Jenny M. Jones, Mohamed Pourkashanian, Christopher M. Rayner
Summary: This study investigates the impact of different ashes on the degradation of MEA. It found that woody biomass fly ashes reduce oxidative degradation products while coal fly ash and olive biomass ash enhance the formation of a newly identified degradation product, HEINO. Solvent samples from a pilot scale facility support these findings.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Materials Science, Multidisciplinary
Debora Salomon Marques, Guillaume Raynel, Duaa Al-Saeed, Mohammad Al-Thabet
Summary: A fully corrosion-resistant direct contact membrane distillation system was constructed to test the feasibility of desalinating oil field produced water using a special membrane material. The study found that high salinity, H2S, and volatile organic compounds negatively impact the efficiency of membrane distillation.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Environmental
Khadijah Alshadly, Qasim Saleem, Guillaume Raynel
Summary: This study explores the use of magnesium or calcium salts as potential catalysts for the decarboxylation of metal bicarbonates as CO2 carriers at low temperatures. The catalyst shows high decarboxylation rate constants at lower temperatures and concentrations, leading to potential energy and cost savings.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Guillaume Raynel, Debora Salomon Marques, Mohammad Al-Thabet
Summary: To ensure a smooth and cost-efficient flow of crude oil emulsion from wells to a production facility, the oil industry heavily relies on predicting the viscosity in pipes. This practice, which depends on a subjective estimate of a maximum packing volume fraction, can be inaccurate and lead to loss of pump efficiency. To overcome this issue, two new concepts were defined – compacity and the occupancy of water droplets at the oil-water interface – which provide a better understanding of emulsion formation and disappearance. Theoretical and experimental approaches were used to investigate the packing of water droplets in emulsions, with a 3D packing model developed to explain observations made during emulsification experiments.
EUROPEAN PHYSICAL JOURNAL E
(2023)
Article
Energy & Fuels
Guillaume Raynel, Debora Salomon Marques, Sajjad Al-Khabaz, Mohammad Al-Thabet, Lanre Oshinowo
Summary: This study presents a new approach to crude oil demulsifier selection, significantly improving the selection and dosage of demulsifiers through bottle tests and field trials. An optimized bottle test methodology was benchmarked against field trial results, with mathematical analysis of field data for demulsifier dosage optimization.
OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES
(2021)
Article
Chemistry, Applied
Lauren Ford, Christopher M. Rayner, Richard S. Blackburn
COLORATION TECHNOLOGY
(2018)