Article
Energy & Fuels
Ewelina Kruszczak, Hanna Kierzkowska-Pawlak
Summary: The study investigated the rates of CO2 absorption in aqueous solutions of N-methyl-1,3-propanediamine (MAPA) and its mixture with N,N-diethylethanolamine (DEEA). The results showed that low concentrations of MAPA in DEEA solutions significantly accelerated the rate of CO2 absorption, indicating its potential as an efficient CO2 absorbent.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Chemical
Zhenbin Xu, Tingting Wang, Jianmeng Wu, Lulu Wang, Xiangping Zhang, Haifeng Dong, Changyu Sun
Summary: This paper systematically investigates the two-phase flow and mass transfer process of CO2 and [C2OHmim]-[Lys]/MDEA mixed aqueous solution in a T-shaped microchannel. The effects of ionic liquid concentration and two-phase flow ratio on bubble length, specific surface area, gas holdup, and mass transfer coefficient are experimentally studied. The results show that the mixed solution of [C2OHmim]-[Lys]/MDEA significantly enhances two-phase mass transfer compared to a single N-methyldiethanolamine aqueous solution. New correlations for predicting the bubble initial length and the volumetric mass transfer coefficient are proposed based on the experimental data.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Samara A. Sadeek, Franky E. Bedoya-Lora, Kyra Sedransk Campbell, Geoff H. Kelsall, Anna Hankin
Summary: In this study, electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) measurements were used to investigate film formation on carbon steel in CO2 saturated methyldiethanolamine(aq) solutions at 80 degrees C, pH 7.9-8.6. Pure FeCO3 films were formed under anoxic conditions, providing corrosion protection to the substrate, while O2 ingress resulted in the formation of iron oxide at the interface, which was less protective.
Article
Engineering, Environmental
Mahdi Abbasian, Hesam Najibi
Summary: This study investigates the use of aqueous solutions of amino acids for CO2 absorption. The kinetics of CO2 absorption in sodium serinate solutions and their blend with piperazine were studied. The results show that sodium serinate solution can be used as a CO2 absorbent, and adding piperazine to the solution can improve the CO2 absorption efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Eduardo I. Concepcion, Alejandro Moreau, David Vega-Maza, Xavier Paredes, M. Carmen Martin
Summary: A high-pressure flow calorimeter is used to determine isobaric heat capacities for aqueous solutions of some amines such as MEA, DEA, TEA, DMAE, MDEA, PZ from T = (293.15 to 353.15) K and up to 25 MPa. The experimental device can measure heat capacities with an estimated total uncertainty better than 1% for a coverage factor k = 2. The isobaric heat capacity values are analysed in conjunction with their temperature and pressure dependencies. Furthermore, empirical equations are proposed to fit isobaric heat capacities as functions of temperature and pressure for given conditions, for this kind of mixtures, obtaining standard deviations within the uncertainty of the measurements. Finally, DMAE shows the highest value of heat capacity and TEA the lowest value, when they are compared at the same conditions of temperature, pressure and composition.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Justyna Wojtasik-Malinowska, Marcin Piatkowski, Michal Blatkiewicz, Maciej Jaskulski, Pawel Wawrzyniak, Andrzej Gorak
Summary: This study investigated the absorption of carbon dioxide in a rotating packed bed with two different types of metal foam packing material and two types of liquid absorbents. The addition of carbonate anhydrase significantly improved the absorption efficiency but also narrowed the operating window. The results showed significantly higher mass transfer efficiency compared to a packed column absorption process.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Engineering, Chemical
Qinlan Luo, Rui Dong, Bohak Yoon, Hongxia Gao, Mengjie Chen, Gyeong S. Hwang, Zhiwu Liang
Summary: The reaction kinetics and molecular mechanisms of CO2 absorption using nonaqueous and aqueous MEA/MDEA/AMP solutions were analyzed. The study found that in nonaqueous solutions, only AMP/MDEA participated in the deprotonation of MEA-zwitterion, while in aqueous solutions, AMP could also react with CO2 through base-catalyzed hydration mechanism in addition to the zwitterion mechanism.
Article
Chemistry, Physical
Rouzbeh Ramezani, Renzo Di Felice
Summary: In this work, the kinetics for the reaction of CO2 with three chemical solvents were studied experimentally and theoretically. The absorption flux of CO2 into different solvents and their blends was measured at various pressure and temperature conditions. The effect of adding different solvents on the absorption rate of CO2 was investigated. In addition, the physical properties of CO2 in the solution were examined and a kinetics model was developed to describe the absorption behavior of CO2.
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
(2022)
Article
Engineering, Chemical
Yifeng Chen, Biao Li, Jian Wu, Zhuhong Yang, Xiaohua Lu, Xiaoyan Ji
Summary: In this study, the kinetic properties of CO2 in aqueous choline-amino acids were systematically investigated, resulting in the proposal of a new absorption ability index. The results indicated that 30 wt% aqueous choline-serine is a promising absorbent for CO2 separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Cheng-Hsiu Yu, Yu-Jeng Lin, David Shan-Hill Wong, Chau-Chyun Chen
Summary: This study presents a first-principle process simulation model for the chemical absorption of CO2 with MEA aqueous solutions using RPB. The model accurately simulates the phase and chemical equilibria, the heat and mass transfer, the reactions between MEA and CO2, and the RPB hydraulics. The reaction rate constant is found to be the controlling step with the greatest potential to enhance CO2 absorption performance in RPB.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Prakash D. Vaidya, Shaurya Mohan, Namrata Upreti
Summary: The kinetics of CO2 absorption in AHPD/PZ mixtures were investigated in this study, revealing a second-order rate constant of 28,685 m3(kmol s)-1 for the reaction between CO2 and PZ. Various properties of the blend were measured, including density, viscosity, and CO2 diffusivity and solubility. The efficiency of CO2 separation in a continuous, closed-loop system using the AHPD/PZ blend was found to be 62%.
Article
Materials Science, Multidisciplinary
Sanshuang Gao, Tianwei Wang, Mengmeng Jin, Shusheng Zhang, Qian Liu, Guangzhi Hu, Hui Yang, Jun Luo, Xijun Liu
Summary: In this study, a bifunctional catalyst for CO2RR and ORR reactions in aqueous Zn-air batteries (ZAB) was developed. The catalyst, consisting of atomically dispersed niobium anchored onto N-doped ordered mesoporous carbon (Nb-N-C), exhibited high activity for CO2RR, ORR, and ZAB, thanks to the high Nb atom-utilization efficiency and ordered mesoporous structure. Furthermore, the self-powered CO2 electrolysis system showed promising performance with continuous CO2 conversion.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Chemical
Fragkiskos Tzirakis, Athanasios I. Papadopoulos, Panos Seferlis, Ioannis Tsivintzelis
Summary: New experimental data for the solubility of CO2 in aqueous solutions containing MCA or CHAP were obtained in this study. These data were used to parameterize the modified model, which successfully described the behavior of amine mixtures.
Article
Engineering, Chemical
Hitesh D. Rawate, Prakash D. Vaidya
Summary: The catalytic regeneration of N-ethylethanolamine (EEA) solvent using commercially available metal oxide catalysts was investigated in this study. The results showed that the Al2O3 catalyst performed well in lowering temperature and reducing energy consumption, while the CO2 desorption efficiency and energy consumption were improved when ZrO2 catalyst was impregnated with SO4(2-).
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
M. S. Ahmed, T. M. Zewail, E-S Z. El-Ashtoukhy, H. A. Farag, I. H. El Azab, F. A. Albatati, A. F. Al-Hossainy, M. Sh Zoromba, M. H. Abdel-Aziz
Summary: The research examines the impact of a stationary wiper almost touching a revolving zinc solid cylinder on the rate of Cu+2 cementation. The study finds that the mass transfer coefficient accelerates as rotation speed and quantity of Cu+2 increase, with the presence of a wiper enhancing the degree of Cu+2 cementation. The data has been interrelated by dimensionless equations for the sizing and running of rotating cylinders used for diffusion-restricted reactions.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Catalina Rus-Casas, M. Dolores La Rubia, Dolores Eliche-Quesada, Gabino Jimenez-Castillo, Juan D. Aguilar-Pena
Summary: This study examined the educational experience of using Personal Learning Environments (PLEs) in the STEM fields for content acquisition. The results showed that PLEs play a positive role in promoting sustainable learning by teaching digital tools and applying them to educational content.
Article
Green & Sustainable Science & Technology
Alfredo Sanchez-Bautista, Ester M. Palmero, Alberto J. Moya, Diego Gomez-Diaz, M. Dolores La Rubia
Summary: Research is focused on developing new solvents for carbon dioxide capture, with a primary goal of reducing energy consumption and minimizing solvent degradation and corrosivity. This study evaluates aqueous blends of AMP and MIPA in terms of physical properties and performance in CO2 absorption, regeneration, and corrosivity.
Article
Genetics & Heredity
Michail Rovatsos, Juan Alberto Marchal, Eva Giagia-Athanasopoulou, Antonio Sanchez
Summary: The study examined the topology of repetitive DNA elements in the karyotypes of different races of Microtus thomasi and M. atticus, revealing the evolutionary relations and mechanisms shaping the morphology of sex chromosomes. This research used the model of the Microtus thomasi/M. atticus species complex to explore how repetitive DNA elements can contribute to inter-species cytogenetic variability through chromosomal rearrangements.
Article
Chemistry, Multidisciplinary
Juan D. Aguilar-Pena, Catalina Rus-Casas, Dolores Eliche-Quesada, Francisco Jose Munoz-Rodriguez, M. Dolores La Rubia
Summary: This paper presents a content curation methodology to assess the acquisition of specific content and soft skills during the attainment of a Degree in Industrial Electronic Engineering. The study shows that the methodology has a positive impact on skills related to collaborative work, digital information management, and lifelong learning.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Sebastian Sanchez, Inmaculada Olivares, Juan G. Puentes, Rafael Orpez, M. Dolores La Rubia, Rafael Pacheco, Juan F. Garcia Martin
Summary: The addition of high-purity NMT improved the extraction yields and quality of olive oil, especially enhancing the content of antioxidant compounds and increasing the oxidative stability of the oil.
Article
Polymer Science
Sofia Jurado-Contreras, Francisco J. Navas-Martos, Jose A. Rodriguez-Liebana, Alberto J. Moya, M. Dolores La Rubia
Summary: This study investigates the use of olive pit as a reinforcement in manufacturing composites based on recycled polypropylene, showing improved mechanical properties by incorporating different additives. The results suggest that the addition of coupling agents significantly enhances the mechanical properties of the biocomposites, while maintaining thermal properties and increasing crystallinity compared to pure recycled polypropylene.
Article
Genetics & Heredity
Juana Gutierrez, Gael Aleix-Mata, Eugenia E. Montiel, Diogo C. Cabral-de-Mello, Juan Alberto Marchal, Antonio Sanchez
Summary: A new species of the genus Talpa, Talpa aquitania, was studied to characterize the satellitome of its genome. It was found that there are 16 different families of satellite DNA in this genome, representing 1.24% of the genome. The localization of these satellite DNA families showed preferential binding to centromeric and non-centromeric heterochromatin.
Article
Engineering, Chemical
Maria Helena Cheu-Guedes, M. Dolores La Rubia, Sebastian Sanchez, Natividad Ramos, Rafael Pacheco
Summary: Flavoured oils are popular among consumers due to their various flavors and versatility, especially in cooking. Aromatizing oils aims to improve their sensory and nutritional properties and prolong their shelf life by adding antioxidant and antimicrobial agents. This research focuses on the influence of aromatic herbs and condiments on the physicochemical parameters of olive oils, such as quality, purity, oxidative stability, and microbiological analysis.
Article
Materials Science, Composites
Jose A. Rodriguez-Liebana, Francisco J. Navas-Martos, Sofia Jurado-Contreras, Francisca Morillas-Gutierrez, Soledad Mateo, Alberto J. Moya, M. Dolores La Rubia
Summary: A two-step chemical process was used to isolate natural fibre with high cellulose content from olive pruning residues. The optimum reaction time, temperature, and HNO3 concentration were determined using the Response Surface Methodology. The obtained cellulose had high crystallinity index and thermal stability. The cellulose was used to manufacture polymer biocomposites and showed potential as a filler for polymeric materials. The mechanical properties and thermal stability of the composites varied depending on the treatment and concentration of the fibres.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Review
Chemistry, Multidisciplinary
Pablo Gonzalez-Torres, Juan G. Puentes, Alberto J. Moya, M. Dolores La Rubia
Summary: Currently, the processes of obtaining and producing food as well as consumption habits give rise to new challenges for food safety. The presence of heavy metals in edible vegetable oils has harmful effects for humans. This study analysed the scientific literature reporting the presence of heavy metals in different types of vegetable oils, evaluating over 25 heavy metals in 35 oils from 24 countries. The study also highlighted the main findings and challenges in this research field, including the migration of antimony from PET containers to edible vegetable oils.
APPLIED SCIENCES-BASEL
(2023)
Article
Biotechnology & Applied Microbiology
Anyul Lopez-Camacho, Dulce Magana-Garcia, Maria Jose Grande, Daniel Carazo-Alvarez, M. Dolores La Rubia
Summary: The study aims to develop bactericidal plastics that reduce the risk of bacterial colonization and infection. Researchers used polylactic acid as the matrix and added silver ions at different concentrations to manufacture antibacterial materials on an industrial scale. The effectiveness of additive R148 at a concentration of 2% was demonstrated throughout the manufacturing process, showing potential application in medicine.
BIOENGINEERING-BASEL
(2023)
Article
Engineering, Mechanical
Jorge Manuel Mercado-Colmenero, M. Dolores La Rubia, Elena Mata-Garcia, Moises Rodriguez-Santiago, Cristina Martin-Donate
Summary: The purpose of this study is to investigate the numerical-experimental mechanical behavior modeling of rPET manufactured using fused filament fabrication. The results of experimental and numerical tests confirm that rPET can be configured as an isotropic material for numerical simulations without modification of its material modeling equations. These findings are of great practical significance to industry, designers, and researchers, validating the use of recycled rPET for sustainable production.
RAPID PROTOTYPING JOURNAL
(2023)
Article
Chemistry, Physical
Sofia Jurado-Contreras, Francisco J. Navas-Martos, Jose A. Rodriguez-Liebana, M. Dolores La Rubia
Summary: Polylactic acid (PLA) is a biomaterial widely used as an alternative to petroleum-based polymeric matrices in plastic components. PLA-based biocomposites reinforced with lignocellulosic waste were studied for their properties and resistance to degradation. The incorporation of olive pits in the biocomposites promoted the degradation of PLA, resulting in decreased strength and increased moduli.
Article
Polymer Science
Sofia Jurado-Contreras, Francisco J. Navas-Martos, Angeles Garcia-Ruiz, Jose A. Rodriguez-Liebana, M. Dolores La Rubia
Summary: The objective of this study is to enhance the mechanical properties of polylactic acid (PLA) by incorporating cellulose nanocrystals (CNC) obtained from olive tree pruning (OTP) waste. The introduction of CNC into PLA matrix significantly improved the mechanical, water absorption, thermal, and morphological properties of the composite, with a notable increase in tensile stress and Young's modulus by 87% and 58%, respectively.
Proceedings Paper
Education, Scientific Disciplines
M. D. La Rubia, C. Rus-Casas, D. Eliche-Quesada, S. Bueno-Rodriguez, J. D. Aguilar-Pena
Summary: Projects promoting entrepreneurship have allowed teachers to bring entrepreneurial training to higher education classrooms. Through the framework of sustainable entrepreneurship, students are trained in the three dimensions of sustainability: environmental protection, economic, and social components. However, results indicate a lack of training in the economic and social dimensions of sustainability for engineering students.
XV INTERNATIONAL CONFERENCE OF TECHNOLOGY, LEARNING AND TEACHING OF ELECTRONICS (TAEE 2022)
(2022)
