Article
Chemistry, Inorganic & Nuclear
Chaohui He, Peng Zhang, Sai Ma, Yujuan Zhang, Tuoping Hu
Summary: Developing ultra-stable adsorbents with high CO2 adsorption performance is an effective solution for the separation of CO2/CH4 and CO2/N-2.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Job J. C. Struijs, Valery Muravev, Marcel A. Verheijen, Emiel J. M. Hensen, Nikolay Kosinov
Summary: The catalytic conversion of CO2 to valuable chemicals is a promising solution to counteract the negative effects of increasing CO2 concentration. In this study, Co/CeO2 was explored as a catalyst for the methanation of diluted CO2 streams, showing excellent performance at low reaction temperatures and CO2 partial pressures. Mechanistic understanding of this activity was gained through in situ spectroscopic techniques, revealing the importance of the cobalt-ceria interface in enhancing catalytic activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jinyoung Seo, Jason D. Braun, Vidhya M. Dev, Jarad A. Mason
Summary: Barocaloric effects, induced by applied hydrostatic pressure, offer promise for solid-state refrigerants. The pressure-induced spin-crossover transitions in a molecular iron(II) complex have been found to drive giant and reversible barocaloric effects, providing new insights for the design of barocaloric materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Energy & Fuels
Kang Yang, Junping Zhou, Xuefu Xian, Yongdong Jiang, Chengpeng Zhang, Zhaohui Lu, Hong Yin
Summary: The study investigated the impact of supercritical CO2-water exposure on the adsorption characteristics of shale, revealing that increasing exposure pressure and decreasing exposure temperature resulted in a gradual decrease in CH4 and CO2 adsorption capacity in shale due to alterations in mineral composition and pore structure. The study also found that the selectivity factor of CO2 to CH4 decreased with increasing exposure pressure and decreasing temperature, indicating the feasibility of CO2-enhanced shale gas recovery and sequestration even after exposure to ScCO2-water.
Article
Chemistry, Multidisciplinary
Chiara Zagni, Alessandro Coco, Sandro Dattilo, Vincenzo Patamia, Giuseppe Floresta, Roberto Fiorenza, Giusy Curcuruto, Tommaso Mecca, Antonio Rescifina
Summary: New polymeric macroporous materials based on poly 2-hydroxyethyl methacrylate (pHEMA) were synthesized and tested for CO2 adsorption. The materials functionalized with lysine and histidine showed exceptional adsorption capacity. The morphology of the materials, specifically hydrogels, played a significant role in improving the adsorption performance.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Chemical
Jinsong Shi, Hongmin Cui, Jianguo Xu, Nanfu Yan
Summary: A facile synthesis method for carbon spheres with high specific surface area and excellent CO2 capture performance was reported. The use of KHCO3 as a catalyst, along with the addition of CTAB as a morphology mediator, led to the successful synthesis of carbon spheres. These spheres exhibited ultrahigh specific surface area of 3576 m2/g and achieved superior CO2 capture performances at both 1 and 20 bar. The results have significant implications for pre-combustion CO2 capture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Marvin Benzaqui, Mohammad Wahiduzzaman, Heng Zhao, Md Rafiul Hasan, Timothy Steenhaut, Ali Saad, Jerome Marrot, Perine Normand, Jean-Marc Greneche, Nicolas Heymans, Guy de Weireld, Antoine Tissot, William Shepard, Yaroslav Filinchuk, Sophie Hermans, Florent Carn, Magdalena Manlankowska, Carlos Tellez, Joaquin Coronas, Guillaume Maurin, Nathalie Steunou, Christian Serre
Summary: Iron(iii) carboxylate based metal organic frameworks (MOFs)/porous coordination polymers (PCPs) have attracted great interest due to their structural diversity, tunable porosity, stability, functionality, scalability, and green synthesis. This study presents a new Fe(iii) based PCP with one dimensional narrow pore channels decorated with polar groups, which shows moderate CO2 capacity and high CO2/N-2 selectivity. The compatibility of this MOF with elastomer block copolymer allows the production of mixed matrix membranes with improved CO2/N-2 separation performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Leonardo H. de Oliveira, Marcus V. Pereira, Joziane G. Meneguin, Maria Angelica S. D. de Barros, Jailton F. do Nascimento, Pedro A. Arroyo
Summary: This work investigated the influence of different regeneration conditions on CO2 adsorption on NaA zeolite at high pressures. The characterization of NaA zeolite showed a stable and highly porous structure, with a specific surface area of 247 m2 g-1. The adsorption isotherms of CO2 on NaA zeolite were highly favorable, and the heats of adsorption indicated a physisorption process. The working capacity of NaA zeolite was found to be highly sensitive to pressure and less affected by adsorption temperature.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Geosciences, Multidisciplinary
Ruying Ma, Yanbin Yao, Meng Wang, Xuguang Dai, Anhang Li
Summary: This study investigated the adsorption mechanism of CH4 and CO2 on coal samples under equilibrium water condition. The results showed that water had an inhibitory effect on the adsorption of CH4 and CO2, and low-rank coals had higher adsorption capacity of CO2 than that of CH4. The differential adsorption of CH4 and CO2 was attributed to differences in coal maceral compositions and the development of micro- and meso-pores in different coals.
NATURAL RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Maria E. Penafiel, Jose M. Matesanz, Eulalia Vanegas, Daniel Bermejo, Rosa Mosteo, Maria P. Ormad
Summary: This study demonstrated the adsorption capacity of sugarcane bagasse for ciprofloxacin removal from water, showing that sugarcane bagasse had higher efficiency and faster adsorption rate compared to commercial powdered activated carbon. The study also revealed that the adsorption process was quicker on sugarcane bagasse and more sensitive to bed height.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Yixin Zhao, Xiaodong Guo, Zhenyu Tai, Yirui Gao, Siqi Li
Summary: The adsorption characteristics of coal to CO2 were studied by in situ small angle X-ray scattering experiments of coal at different CO2 adsorption pressures. The change of scattering intensity in nanopores of different sizes was analyzed, and the porosity, specific surface area, and average aperture were quantitatively characterized. The results showed that the 5 nm pores were more susceptible to higher CO2 pressure, while the scattering phenomenon in the 15 nm pores changed most significantly at lower CO2 pressure.
Article
Engineering, Chemical
Yong-Zhi Li, Rajamani Krishna, Fan Xu, Wan-Fang Zhang, Yanwei Sui, Lei Hou, Yao-Yu Wang, Zhonghua Zhu
Summary: In this study, a novel microporous Cd-MOF material was constructed with a high C2H2 adsorption capacity, which can efficiently separate C2H2 from gas mixtures. The experimental results and molecular simulation demonstrated the importance of this material in acetylene separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Applied
Meng Rong, Liangrong Yang, Chao Yang, Jiemiao Yu, Huizhou Liu
Summary: The newly synthesized TPADT triazine-based multiamine was used to prepare highly microporous Ad-MALPs through catalysis-free copolymerization, resulting in customized BET surface area and narrow ultramicropore size distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Tong Li, Ping Cui, Di Sun
Summary: Metal-organic frameworks (MOFs) are low-energy physisorbents with modifiable pores and framework structures, and understanding the influence of these structural features is crucial for the design of tailor-made materials. In this study, a MOF named SDU-CP-1 was assembled using tetrakis(4-carboxyphenyl)porphyrin (TCPP-Ni), 2,4,5-tris(4-pyridyl)imidazole (TPIM) ligands, and Ni2+ cations. The results showed that SDU-CP-1 exhibited high uptake for C2H2 and selectivity for C2H2/CO2 at room temperature.
INORGANIC CHEMISTRY
(2022)
Article
Environmental Sciences
Luiz K. C. de Souza, Flaviana C. P. Ribeiro, Rayanne O. Araujo, Jamily L. L. Santos, Mariana N. N. Guimaraes, Victoria M. R. Lima, Jamal da S. Chaar, Newton P. S. Falcao
Summary: The increase in burning, deforestation, and excessive use of fossil fuels have led to an increase in carbon dioxide emissions, which intensifies the greenhouse effect and causes drastic climate changes. Porous carbon materials synthesized from lignocellulosic waste are effective alternatives for CO2 capture due to their selectivity, low-cost synthesis, high surface area and pore volume, and thermal and chemical stability. This study proposes the synthesis of activated carbon from Brazil nut biomass residues using physical and chemical activation methods, which result in a microporous structure with high CO2 adsorption capacity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Monickarla Teixeira Pegado da Silva, Felipe Fernandes Barbosa, Marco Antonio Morales Torre, Jhonny Villarroel-Rocha, Karim Sapag, Sibele B. C. Pergher, Tiago Pinheiro Braga
Article
Chemistry, Physical
Jhonny Villarroel-Rocha, Deicy Barrera, Jose J. Arroyo-Gomez, Karim Sapag
Summary: There is a well-known relationship between the performance of porous materials in a given process and their textural properties, with gas adsorption being the most widely used experimental technique to determine specific surface area. By analyzing adsorption-desorption isotherms of nanoporous silica materials using different adsorptives at 77K, the specific surface area values were obtained. The quadrupole moment of adsorptive gases like N-2 and O-2 plays a significant role in affecting the specific surface area value by generating specific interactions with surface groups.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2021)
Article
Chemistry, Physical
C. F. Toncon-Leal, J. Villarroel-Rocha, M. T. P. Silva, T. P. Braga, K. Sapag
Summary: The study utilized Ar adsorption-desorption isotherms and scanning hysteresis loops to analyze the connectivity of the porous network in ordered mesoporous materials, with results showing that two mathematical models could be applied to adjust the desorption branches in the loops, associating these results with the connectivity in the porous network and the presence of pore-blocking effects.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2021)
Article
Environmental Sciences
Celene Garcia-Carvajal, Jhonny Villarroel-Rocha, Vanessa Castro de Souza, Karim Sapag
Summary: This work successfully prepared a ceramic monolith with a honeycomb structure, which exhibited excellent performance in adsorbing dyes and high removal capacity. The research findings are of great significance for the development of low-cost and easy-to-handle adsorbents.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Maria G. Amaya, Andres A. Garcia Blanco, Cristian Toncon-Leal, Karim Sapag
Summary: Various strategies for incorporating cobalt into Al-pillared clay materials were studied to obtain Co-catalysts for Fischer-Tropsch synthesis of synthetic fuels. The catalytic materials were characterized using multiple techniques, and their catalytic behavior was evaluated in a laboratory-scale microreactor.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Evan L. Floyd, Jonghwa Oh, Karim Sapag, Toluwanimi M. Oni, Jacob S. Shedd, Claudiu T. Lungu
Summary: In this study, a novel photothermal desorption (PTD) technique was used to partially desorb toluene from different carbonaceous substrates. The results showed that single-walled carbon nanotube felts exhibited higher and more consistent desorption compared to activated carbon powder or single-walled carbon nanotube powder at different light energies, which could be attributed to the unique nanomaterial properties of the felt structure.
Article
Pharmacology & Pharmacy
Kiara Montiel-Centeno, Deicy Barrera, Fatima Garcia-Villen, Rita Sanchez-Espejo, Ana Borrego-Sanchez, Enrique Rodriguez-Castellon, Giuseppina Sandri, Cesar Viseras, Karim Sapag
Summary: Functionalized KIT-6 and KIT-6/NH2 were effective carriers for loading and controlled release of cephalexin, protecting it from degradation at pH 6.8 and showing diffusion-controlled release profiles that satisfied the Korsmeyer-Peppas kinetic model. Mesoporous silicas in this study demonstrated high cell viability and potential for use in controlled release systems for cephalexin.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Rafael C. Lima, Christian W. Lopes, Jhonny Villarroel-Rocha, Lindiane Bieseki, Karim Sapag, Sibele B. C. Pergher
Summary: A study was conducted to control the crystal morphology of mordenite zeolite particles through the synthesis parameters. The manipulation of hydrothermal parameters directly affected the sizes, morphologies, and textural properties of the particles. It was found that mordenite could exhibit a fin morphology with additional mesoporosity, which is promising for reducing diffusional issues.
Article
Nanoscience & Nanotechnology
Alicia Vergara-Rubio, Laura Ribba, David Emmanuel Picon Borregales, Karim Sapag, Roberto Candal, Silvia Goyanes
Summary: This study successfully developed two highly ultramicroporous, self-supporting, and nanostructured 2D carbonaceous materials with high H2 sorption capacity. The materials were obtained from poly(vinyl alcohol) electrospun mats through heat treatment and acidic activation. The materials exhibited self-supporting property and complete desorption. The addition of the acidic activation further enhanced H2 adsorption capacity.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Agustin A. Godoy, Dimar Villarroel-Rocha, Jose Joaquin Arroyo-Gomez, Celeste Bernini, Griselda Narda, Karim Sapag
Summary: This study investigated the influence of degassing temperature and urea functionalization on the CO2 adsorption performance of CPO-27-Mg. Four samples with different degrees of urea functionalization were obtained through post-synthesis modification treatments. The influence of degassing temperature on the non-functionalized MOF was also evaluated. The resulting compounds were characterized and the thermally treated and functionalized CPO-27-Mg was evaluated for CO2 capture.
Article
Environmental Sciences
Mirian Elizabeth Casco, Valentin Moreno, Martin Duarte, Karim Sapag, Andres Cuna
Summary: Although landspreading and incineration are currently used for the disposal of primary sludge and biosludge in Uruguayan pulp mill wastewater treatment plants, direct incineration for energy recovery is the most preferred method. This study proposes hydrothermal carbonization (HTC) as a pre-treatment method to enhance the fuel characteristics of the sludge. The results show that HTC affects the sludge differently in terms of carbon fixation, energy densification, and conversion efficiency.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Chemistry, Applied
Leonardo Andres Cano, Deicy Barrera, Jhonny Villarroel-Rocha, Karim Sapag
Summary: Layered double hydroxides were synthesized by co-precipitation of Mg2+ and Al3+ ions at constant pH. Different methods of solution additions and temperatures were tested, resulting in varied crystallinity and interlaminar spacing. The solids obtained at higher temperatures showed better textural properties and exhibited higher efficiency in nitrate removal. This study demonstrates the correlation between synthesis method, textural properties, and the application of removing contaminants.
Article
Electrochemistry
Analia Natali Arias, Jhonny Villarroel-Rocha, Karim Sapag, Maria Fernanda Mori, Gabriel Angel Planes, Alvaro Yamil Tesio, Victoria Flexer
ELECTROCHIMICA ACTA
(2020)
Article
Chemistry, Multidisciplinary
D. Villarroel-Rocha, Agustin A. Godoy, C. Toncon-Leal, J. Villarroel-Rocha, M. S. Moreno, Maria C. Bernini, Griselda E. Narda, K. Sapag
NEW JOURNAL OF CHEMISTRY
(2020)
