Article
Energy & Fuels
Bita Karami, Ahad Ghaemi, Shahrokh Shahhosseini
Summary: In this study, a novel hybrid solvent based on DESs was developed for CO2 separation. Different DESs added to DEA solution showed varying CO2 absorption performance and mass transfer characteristics. Hydrodynamic studies revealed a decrease in bubble size with the addition of DES, and partial replacement of water resulted in improved CO2 capture efficiency.
Article
Engineering, Chemical
Ehsan Heidaryan, Babak Aghel, Sasan Sahraie, Mahmoud Maleki
Summary: This study investigated the effects of temperature, solvent flow rate, and gas flow rate on carbon dioxide absorption and liquid-side volumetric mass transfer coefficient in a microreactor using various solvents. Ethylene glycol achieved the highest absorption (91.57%) and the highest klav value (18.2 s-1) at 15 degrees C, indicating its potential as an alternative solvent for carbon dioxide absorption applications.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Multidisciplinary
Zohreh Khoshraftar, Ahad Ghaemi, Amir Hossein Mohseni Sigaroodi
Summary: The study investigated CO2 absorption using chemical solvent of amine H2O-TEA-CO2 in presence of activated carbon particles, showing that the addition of solid particles to chemical solvents effectively enhances CO2 absorption.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Multidisciplinary Sciences
Zohreh Khoshraftar, Ahad Ghaemi
Summary: Greenhouse effects are a natural phenomenon that shape the climate system. In this research, waste walnut shells were used to extract activated carbon particles as a biosorbent for CO2 capture using MEA solution. Experimental results showed that the presence of activated carbon particles increased the CO2 loading in the MEA solution.
Article
Environmental Sciences
Hamid Ramezanipour Penchah, Ahad Ghaemi, Hamed Godarziani
Summary: This study experimentally modified the nanoclay montmorillonite adsorbent with diethanolamine to optimize CO2 adsorption operating conditions, resulting in a significant increase in adsorption capacity. The research also found that the Langmuir-Freundlich and Hill models have better precision in predicting the adsorption behavior, while the Elovich model is best suited for modeling CO2 capture data.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Gabriel Martins Rosa, Michele Greque Morais, Jorge Alberto Vieira Costa
Summary: This study evaluated biomass production, CO2 fixation, and biomolecule production in a semicontinuous culture process using Chlorella fusca LEB 111 with the addition of monoethanolamine and nutrient reuse. The results showed that under specific conditions, it was possible to achieve high biomass and CO2 utilization efficiency.
BIOENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Shashi Kant Shukla, Yong-Lei Wang, Aatto Laaksonen, Xiaoyan Ji
Summary: A 30% (w/w) [ImCl][EDA]-based deep eutectic solvent (DES) in water has shown better CO2 uptake performance, desirable kinetics, lower regeneration enthalpy, and lesser degradation compared to the industrially popular 30% monoethanolamine (MEA) solution.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Zhen Li, Caili Yang, Yingshi Su, Yonghui Cheng, Yanjia Cui, Suyao Liu, Yiwen Fang
Summary: This work investigates the impacts of triethanolamine (TEOA) on the performance of photochemical CO2 reduction. The study demonstrates that TEOA can effectively catalyze the conversion of CO2 to CO under light irradiation. The results show that this method can yield a significant amount of CO product in a short time, and the photochemical system exhibits good stability. This study provides a deep understanding of the effects of TEOA on the performance of photocatalytic CO2 reduction and serves as a reference for evaluating the catalytic activity of catalysts.
Article
Energy & Fuels
Babak Aghel, Mahmoud Maleki, Sasan Sahraie, Ehsan Heidaryan
Summary: The study investigated the use of different alcoholic mixtures as solvents for CO2 absorption in a microreactor, finding that alcoholic solvents reduced energy consumption during CO2 desorption, with the most effective mixture being monoethanolamine + methanol.
Article
Chemistry, Physical
Xingguang Xu, Matthew B. Myers, Friso G. Versteeg, Ethan Adam, Cameron White, Emma Crooke, Colin D. Wood
Summary: Amino acid salt (AAS) is a promising green material for CO2 capture, and encapsulating AAS into solid polymer matrices can enhance absorption rate and capacity, providing a simple and scalable solution for carbon capture.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Thermodynamics
Weifeng Zhang, Yuanlong Xu, Zhaoxiong Deng, Qiuhua Wang
Summary: The study demonstrates that the efficiency of chemical desorption can be significantly improved by using different desorption agents and operating under specific conditions. Under optimal conditions, the desorption rate can reach high levels, providing a promising alternative to traditional thermal desorption methods.
Article
Chemistry, Physical
Fengming Chu, Guozhen Xiao, Guoan Yang
Summary: This study established a new model for the regeneration process and analyzed the temperature and species concentration distributions using the field synergy theory. The mass transfer performance was investigated under multiple working conditions, revealing that the liquid film dominates the mass transfer process and the liquid phase significantly influences the specific heat consumption. Energy consumption can be saved by adjusting the liquid flow rate and temperature.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Multidisciplinary
M. Nur Hossain, Syed Ahmad, Iranaldo Santos da Silva, Heinz-Bernhard Kraatz
Summary: The study demonstrated the synthesis of unique coinage metal nanodendrites as effective electrocatalysts for CO2 reduction, optimized their catalytic activity in an ethanolamine solution, and found formate as a product of the CO2 reduction process through spectroscopy analysis.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Engineering, Chemical
Mangaleswari Santhosh Kumar, Ambedkar Balraj, Ramamurthy Nagarajan, Ravichandar Babarao
Summary: This study investigates the enhancement of high-frequency ultrasound assisted solvent regeneration/CO2 stripping process using hydrophobic micronized particles. It shows that the addition of 0.005 wt% micronized particles can significantly reduce the solvent's sensible energy requirements and increase the CO2 stripping rate.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Shervan Babamohammadi, Rozita Yusoff, Mohamed Kheireddine Aroua, Tohid N. Borhani
Summary: The study investigated CO2 mass transfer coefficients in aqueous blends of MEA and glycerol. The results showed that increasing glycerol to 10% improved overall mass transfer, while increasing it to 20% decreased mass transfer. Gas-side mass transfer resistance was negligible, with the primary resistance being in the liquid phase. The 10% glycerol and 25% MEA solution had the highest liquid-side mass transfer coefficient among others, showing a comparable absorption rate with higher MEA concentrations.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Diego Gomez-Diaz, Abel Muniz-Mouro, Jose M. Navaza, Antonio Rumbo
Summary: This study analyzes the behavior of aqueous solutions of N,N-dimethylethylenediamine as a chemical solvent for carbon dioxide separation by gas-liquid absorption. The experimental work focuses on comparing diamine and amines blend solvent, and explores the influence of amine type, concentration, ratio between different amines, and gas flow rate on absorption kinetics.
Article
Engineering, Chemical
Maria Castro, Diego Gomez-Diaz, Jose M. Navaza, Antonio Rumbo
Summary: The study analyzed the use of sodium salts of aqueous solutions of different amino acids for carbon dioxide separation by chemical absorption in a bubble-column reactor under various experimental conditions. It evaluated the differences in absorption rate and reaction mechanism caused by the presence of carboxylic groups, finding that glycinate solvent exhibits similar behavior to monoethanolamine solution but with higher destabilization of carbamate for increased CO2 loading, while prolinate behaves similarly to pirrolidine at low CO2 loadings. The absorption capacity of both solvents significantly reduces during stripping regeneration.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ana B. Lopez-Garcia, Teresa Cotes-Palomino, Manuel Uceda-Rodriguez, Jose Manuel Moreno-Maroto, Carlos Javier Cobo-Ceacero, N. M. Fernanda Andreola, Carmen Martinez-Garcia
Summary: Investigations have shown that applying Life Cycle Assessment (LCA) in the construction sector can significantly reduce environmental impact of construction products. Promoting best available techniques and eco-innovation in production plants can replace finite natural resources with waste generated in other processes, locally available, stimulating the creation of more sustainable products. Conducting a comparative LCA study between traditional ceramic brick manufacturing process and incorporating waste generated in the virgin oil extraction process is essential for integrating circularity and eco-innovation in production system of traditional ceramic materials.
APPLIED SCIENCES-BASEL
(2021)
Article
Thermodynamics
Diego Gomez-Diaz, Jose M. Navaza
Summary: This research examines the behavior of ternary mixtures composed of hexamethylenetetramine, water, and ethanol in relation to physical properties such as density, speed of sound, viscosity, and surface tension. The presence of ethanol causes significant changes in the behavior of the liquid mixture, with one important effect being the elimination of temperature-resistant structures with low additions of ethanol.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Energy & Fuels
D. Gomez-Diaz, M. Parajo, O. Richoux, M. D. La Rubia, A. Rumbo
Summary: The development of new solvents for carbon dioxide separation through chemical absorption has become increasingly important. The use of biphasic solvents in this process has shown promising results, with the proposed solvent based on N-ethylpiperidine exhibiting suitable performance at high organic phase/aqueous phase ratios. Further solvent regeneration studies have also yielded positive results, avoiding losses in absorption rate and capacity.
Article
Chemistry, Multidisciplinary
Manuel Uceda-Rodriguez, Jose Manuel Moreno-Maroto, Carlos Javier Cobo-Ceacero, Ana B. Lopez-Garcia, Teresa Cotes-Palomino, Carmen Martinez-Garcia
Summary: The application of Life Cycle Assessment in the construction sector is a useful tool to reduce environmental impact. This study compared the life cycles of artificial lightweight aggregates (LWA) manufactured with waste and traditional methods. The results showed that LWA manufactured with almond and hazelnut shells had the highest environmental performance.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Ceramics
Carlos Javier Cobo-Ceacero, Jose Manuel Moreno-Maroto, Marta Guerrero-Martinez, Manuel Uceda-Rodriguez, Ana B. Lopez, Carmen Martinez Garcia, Teresa Cotes-Palomino
Summary: This study investigates the use of four organic solid wastes (coffee grounds, ground nut shell, paper money sewage sludge, and cork powder) as bloating inducing agents in lightweight aggregate (LWA) manufacturing. The addition of these wastes improves the operational and technological aspects of LWAs, reducing the working temperature and promoting bloating and the development of a lightweight structure. Leachate studies confirm that the LWAs meet regulatory limits. This research highlights the potential of utilizing different organic wastes in the production of environmentally friendly LWAs, aligning with the principles of the Circular Economy.
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
(2023)
Article
Green & Sustainable Science & Technology
Lidia Dominguez-Ramos, Ainoha Prieto-Estalrich, Giulio Malucelli, Diego Gomez-Diaz, Maria Sonia Freire, Massimo Lazzari, Julia Gonzalez-Alvarez
Summary: This study analyzes the effect of doping agents in carbon materials on the adsorption and separation of carbon dioxide. The results show that non-activated carbons doped with sulfur exhibit high selectivity and adsorption heat values, making them suitable for carbon dioxide separation from nitrogen mixtures.
Article
Construction & Building Technology
Ana B. Lopez-Garcia, Manuel Uceda-Rodriguez, Sara Leon-Gutierrez, Carlos Javier Cobo-Ceacero, Jose Manuel Moreno-Maroto
Summary: Waste recycling is an important means to mitigate environmental problems. This study found that glass wool and rock wool can be used as raw materials for lightweight aggregates, with suitable density and mechanical strength. The use of glass wool significantly reduces energy consumption in the manufacturing of lightweight aggregates, and there is a significant environmental improvement compared to traditional artificial aggregates.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Ceramics
Jose Manuel Moreno-Maroto, Carlos Javier Cobo-Ceacero, Antonio Conde-Sanchez, Ana M. Martinez-Rodriguez, Beatriz Gonzalez-Corrochano, Jacinto Alonso-Azcarate, Manuel Uceda-Rodriguez, Ana B. Lopez, Carmen Martinez-Garcia, Teresa Cotes-Palomino
Summary: The relationship between the proportions of multicomponent mixtures and the technological properties of ceramic granular materials has been studied using statistical methods. The Mixture Experiments Design of Experiments was applied to analyze the 36 starting formulations and determine the optimal compositions. The models fit well with the experimental data, suggesting the potential of this approach for future research on artificial aggregates and other ceramic materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Diego Gomez-Diaz, Jose Manuel Navaza, Antonio Rumbo
Summary: This study analyzed the absorption capacity of different types of diamine solvents for carbon dioxide, taking into account the type of amino centers in the molecule structure, and found that different types of radicals have significant effects on the properties of amine solvents.
Article
Energy & Fuels
Catarina H. Pimentel, M. Sonia Freire, Diego Gomez-Diaz, Julia Gonzalez-alvarez
Summary: To solve the problem of wastewater containing dyes, researchers prepared a novel activated carbon from untreated pine sawdust and used it for dye adsorption. The activated carbon showed high surface area and microporosity, and exhibited good adsorption performance for blue and black dyes. The adsorption equilibrium data for blue and black dyes fit well in the Freundlich model, while that for the red dye fit in the Langmuir model.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Catarina Helena Pimentel, Lidia Diaz-Fernandez, Diego Gomez-Diaz, Maria Sonia Freire, Julia Gonzalez-Alvares
Summary: Reducing the harmful impacts of CO2 emissions and greenhouse effect on climatic conditions is necessary. In this study, biochar and activated carbons were produced and characterized. The activated carbon activated at 600 degrees C with KOH at a ratio of 1:4 w/w showed the highest CO2 adsorption capacity and selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
