Article
Chemistry, Analytical
E. A. A. El-Shazly, G. A. Dakroury, H. H. Someda
Summary: TiO2 is supported on silica gel surface in a 1:1.329 mole ratio to form the TiO2(0.5)/SiO2(0.5) composite, which is characterized by physico-chemical techniques and used as a sorbent for Cs-134 and Co-60 radionuclides. The composite shows saturation sorption capacities of 33.1 and 17.7 mg g(-1) for Cs-134 at pH 9.5 and Co-60 at pH 5.5, respectively, with an adsorption mechanism following the Freundlich isotherm. The process is found to be spontaneous and favorable.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Engineering, Environmental
Xinxin Dong, Jinji Xi, Bing Song, Mengjie Zhang, Baosheng Jin
Summary: In this study, waste granular silica gel was reused as a nickel-based catalyst support. The Ni/WGSG catalysts showed good performance in the dry reforming of methane (DRM) reaction, with the Ni/WGSG-2 catalyst exhibiting the highest activity. The catalysts also demonstrated good stability under different working conditions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Elena A. Straumal, Andrey A. Mazilkin, Inna O. Gozhikova, Lyudmila L. Yurkova, Sergey Yu Kottsov, Sergey A. Lermontov
Summary: The aim of this study is to investigate the influence of solvents used in the sol-gel process and supercritical drying on the properties of NiO aerogels. It was found that the specific surface area, phase, and chemical composition strongly depend on the synthesis conditions. Using 2-methoxy-ethanol as a solvent can reduce Ni2+ to Ni-0.
Article
Chemistry, Physical
Peter J. Topalian, Bo A. Carrillo, Paul M. Cochran, Michael F. Takemura, Mark E. Bussell
Summary: A series of Ni2-xRuxP/SiO2 catalysts were prepared spanning the full composition space, with Ru playing a key role in lowering the precursor reduction temperature and increasing the P content in the supported Ni2-xRuxP phase. Catalysts with higher Ru content exhibited significantly enhanced HDS activity and selectivity.
JOURNAL OF CATALYSIS
(2021)
Article
Water Resources
Naseer Ahmad Khan, Khalid Saeed, Idrees Khan, Tamanna Gul, Muhammad Sadiq, Ala Uddin, Ivar Zekker
Summary: This study successfully synthesized nickel oxide nanoparticles and nickel oxide/nanoclay nanocomposites, and investigated their photodegradation effect on Orange II dyes in aqueous solution. The results showed that both materials exhibited high degradation efficiency for Orange II under certain conditions.
APPLIED WATER SCIENCE
(2022)
Article
Chemistry, Organic
H. Abbas, A. D. Manasrah, A. Abidi Saad, K. O. Sebakhy, Y. Bouhadda
Summary: This study conducted adsorption experiments on Algerian asphaltene samples extracted from the Hassi Messaoud oil field for the first time using novel synthesized gamma-Fe2O3 nanoparticles. The results demonstrated that the synthesized nanoparticles have high affinity for removing asphaltenes and reached equilibrium after 15 minutes, showing promising potential as nano-adsorbents.
PETROLEUM CHEMISTRY
(2021)
Article
Chemistry, Physical
Adil Alshoaibi, Shumaila Islam
Summary: Sol-gel-based titania nanoparticles, Silica-titania nanocomposite, and zinc supported silica-titania nanocomposites were synthesized at low temperature. The study showed that zinc nanoparticles were homogeneously distributed in the silica-titania nanocomposite, and the doping of zinc enhanced the photocatalytic activity of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Oscar E. Medina, Dahiana Galeano-Caro, Bergit Brattekas, Agustin F. Perez-Cadenas, Francisco Carrasco-Marin, Farid B. Cortes, Camilo A. Franco
Summary: This study evaluates multifunctional nanomaterials for CO2 adsorption and its subsequent transformation into valuable sub-products during the catalytic decomposition of asphaltenes in a steam gasification atmosphere. The best nanoparticle morphology doped with 1% Ni and Pd (C-CeNiPd) shows the highest adsorption capacity and catalytic activity. When steam is injected, CO2 adsorption decreases in all systems. The nanoparticle with the best morphology (C-CeO2) adsorbs about 24.3% of CO2 at 200 degrees C, and the yield increases to 34% after doping with Ni and Pd.
Review
Chemistry, Physical
Antonio Reina, Rodrigo Carmona-Chavez, Israel T. Pulido-Diaz, Draco Martinez, Karla P. Salas-Martin, Itzel Guerrero-Rios
Summary: The combination of first-row transition compounds or nanoparticles with silica-based supports provides a promising approach for catalyst design. Iron, cobalt, and nickel-based materials are particularly attractive due to their availability, low cost, and unique reactivity, which allows for transformations not achievable with noble metals. Mesoporous silica-based supports, with their high surface area, tunable pore size and volume, as well as thermal and chemical stability, are of great interest for catalyst adsorption and reactant diffusion. However, despite their wide application, it remains challenging to predict or understand the key features of silica-supported first-row transition metals-based catalysts. A review on the rational tailoring and application of nano-sized materials immobilized on silica-based supports in catalysis is necessary.
Article
Nanoscience & Nanotechnology
Venkata K. Perla, Kaushik Mallick
Summary: A protocol for preparing carbon nitride (CN)-supported nickel oxide nanoparticles using a high-temperature route was described, with the formation of dispersed nickel oxide nanoparticles confirmed. The CN-nickel oxide (CNNO) hybrid system showed promising electrical properties, optical properties, and crystalline structure morphology changes.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Hideo Maruyama, Hideshi Seki, Akito Furukawa
Summary: The adsorption behavior of methyl palmitate on a silica surface in the presence of methanol and toluene was studied, and an adsorption model based on Langmuir type adsorption was proposed. The experimental data matched well with the proposed model, and the equilibrium adsorption constant K correlated with the dielectric constant of each substance. The adsorption parameters were experimentally verified under different conditions.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Daichi Takami, Junya Tsubakimoto, Wirya Sarwana, Akira Yamamoto, Hisao Yoshida
Summary: The design of optimized photothermal catalysts is essential for the efficient conversion of CO2 into syngas using solar energy. This study demonstrated that silica-supported nickel catalysts prepared via Ni phyllosilicate exhibited superior catalytic performance and resistance to sintering and carbon deposition under visible and near-infrared light. The loading of nickel had positive and negative effects on the surface temperature and light absorption capacity, which influenced the photothermal catalytic activity for methane dry reforming.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Sean R. Noble, Sean E. Barnes, Ritubarna Banerjee, Jeff Miller, John R. Regalbuto
Summary: Gold bis-ethylenediamine (AuED) is an effective precursor for synthesizing small Au nanoparticles on common catalyst supports. The electrostatic mechanism is shown to account for the data better than the previously proposed cation exchange mechanism, with adsorption predominantly driven by electrostatic interactions on carbon supports. The synthesized Au nanoparticles were generally smaller than those obtained through other methods, with electrostatic adsorption providing a simple method for synthesizing well-dispersed Au nanoparticles.
JOURNAL OF CATALYSIS
(2021)
Review
Chemistry, Multidisciplinary
Sharlee L. More, Michael Kovochich, Tara Lyons-Darden, Michael Taylor, Alexandra M. Schulte, Amy K. Madl
Summary: Nickel nanomaterials have exceptional physical and chemical properties, which have been utilized in various applications, but may also pose potential adverse health effects. This review critically evaluates the toxicity data of oxidic nickel nanoparticles, emphasizing physico-chemistry properties, model system appropriateness, biodistribution, and exposure routes. Future studies are needed to better understand the dose-response relationship and potential biological responses of nickel nanomaterials.
Article
Engineering, Multidisciplinary
Mohamed Ahmed Mahmoud
Summary: In this study, a polyphenol compound was used to chemically modify silica nanoparticles as a sorbent nanocomposite for U (VI) removal. The Pyrogallol silica nanocomposite (PSCN) showed a maximum sorption capacity of 58.45 mg/g under optimal conditions. The sorption process was found to be exothermic and in good agreement with pseudo-second-order kinetics and Langmuir isotherm adsorption model.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Engineering, Manufacturing
Ezio Carvalho de Santana, Wellington Francisco da Silva, Marcella Grosso Lima, Gabriela Ribeiro Pereira, Douglas Bressan Riffel
Summary: This article evaluates an active thermography algorithm for detecting subsurface defects in materials produced by additive manufacturing. The algorithm utilizes thermographic signal reconstruction, thermal contrast, and principles of heat transfer. The algorithm outperforms state-of-the-art TSR technique in terms of contrast, sensitivity to defect depths, and noise reduction, resulting in clearer images that accurately depict the location of subsurface defects.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Chemical
Karen M. Ceron, Daniela Arias-Madrid, Jaime Gallego, Oscar E. Medina, Lidia E. Chinchilla, Farid B. Cortes, Camilo A. Franco
Summary: In this study, supported tungsten oxide nanoparticles were synthesized and evaluated for their performance in wet in situ combustion of n-C-7 asphaltenes. The results showed that these nanoparticles improved the decomposition of asphaltenes by reducing the decomposition temperature. The synthesis parameters, such as temperature and impregnation dosage, played an important role in the adsorptive and catalytic activity of the materials. The catalyzed decomposition of asphaltenes resulted in an increase in light hydrocarbons and hydrogen content.
Article
Energy & Fuels
Karol Zapata, Daniel Lopez, Richard D. Zabala, Italo Bahamon, Masoud Riazi, Camilo A. Franco, Farid B. Cortes
Summary: This study aims to develop novel acid nanocapsules with tailored breaking reservoir temperatures for controlled release of acids to dissolve fine particles. Thermolabile nanocapsules were synthesized and characterized, and a nanofluid was formulated for acid dissolution tests. Results showed that the nanocapsules exhibited controlled release properties, increased acid lifetime, and reduced corrosion.
Article
Engineering, Chemical
Santiago Cespedes, Natalia A. Cano, Gordon Foo, David Jaramillo, Daniel Martinez, Manuel Gutierrez, Javier Pataquiba, Juan Rojas, Farid B. Cortes, Camilo A. Franco
Summary: This study evaluates the potential reduction of greenhouse gas emissions through the deployment of geothermal power co-production systems in two Colombian oil fields. The results demonstrate a significant carbon footprint reduction can be achieved through the use of these systems.
Article
Engineering, Chemical
Lady J. Giraldo, Dahiana Galeano-Caro, Carlos A. Franco, Jesus Archila, Fabio Villamil, Farid B. Cortes, Camilo A. Franco
Summary: The main objective of this study is to develop a novel green nanofluid from Sapindus Saponaria for its application in enhanced oil recovery (EOR) processes. The study successfully extracted green active compound (AGC) from soapberry Sapindus Saponaria and mixed it with bio-ethanol and commercial surfactant at a low concentration to form a bio-nanofluid. The AGC was characterized and the performance of silica-based nanoparticles was evaluated. The adjusted system showed excellent performance in coreflooding tests, indicating an increase in crude oil production with the best bio-nanofluid.
Article
Biochemistry & Molecular Biology
Stephanie Giraldo, Nancy Y. Acelas, Raul Ocampo-Perez, Erika Padilla-Ortega, Elizabeth Florez, Camilo A. Franco, Farid B. Cortes, Angelica Forgionny
Summary: This study found that orange peel can effectively remove methylene blue and cadmium ions from water, particularly observing a synergic effect in multicomponent systems, increasing the adsorption capacity of cadmium ions. The results also showed that the adsorbent has good regeneration performance and potential application value.
Article
Energy & Fuels
Ivan Moncayo-Riascos, Oscar E. Medina, Farid B. Cortes, Camilo A. Franco
Summary: Molecular dynamics simulations successfully reproduced experimental results and a machine learning model was proposed to predict the thermal-oxidative behavior of polycyclic aromatic hydrocarbons (PAHs). The ML model had a high coefficient of determination and can be applied to optimize the transformation of PAHs.
Article
Chemistry, Multidisciplinary
Daniel Lopez, Nicolas M. Chamat, Dahiana Galeano-Caro, Liliana Paramo, Diego Ramirez, David Jaramillo, Farid B. Cortes, Camilo A. Franco
Summary: The objective of this study is to evaluate the role of nanoparticles with different chemical structures in completion fluids (CF) in providing a positive dual effect for well stimulation and clay swelling damage inhibition. The adsorption isotherms show different degrees of affinity, which impacts on the reduction of the interfacial tension between the CF and the reservoir fluids. Fluid-fluid interactions based on interfacial tension (IFT) measurements suggest that positively charged nanoparticles exhibit high IFT reductions. According to the capillary number, certain nanoparticles have a higher capacity to reduce both interfacial and surface restrictions for crude oil production, suggesting that completion fluid with nanoparticles (NanoCF) can function as a stimulation agent.
Article
Energy & Fuels
Gustavo Maya, Aurora L. Carreno Otero, Fabian L. Monares Bueno, Arnold R. Romero Bohorquez, Farid B. Cortes, Camilo A. Franco, Eduardo Manrique
Summary: Recent studies have identified wettability alteration as the primary consequence of adjusted brine composition water flooding (ABCW) and low-salinity water flooding (LSW). However, further research is needed to provide a phenomenological explanation and clarify the key components of the system (rock-oil-brine). This study focuses on determining the relevant variables for smart water effects by conducting static (contact angles) and dynamic tests (coreflooding). The results show that oil-brine ion exchange plays a significant role in explaining observed displacement efficiencies and pressure differentials.
Article
Energy & Fuels
Camilo A. Franco, Karol Zapata, Liliana Paramo, Paola Garzon, Diego Ramirez, David Jaramillo, Farid B. Cortes
Summary: The objective of this research was to develop and incorporate nanodetectors (NDs) in drilling fluids to identify the contribution of different producing zones in naturally fractured carbonate reservoirs. Novel nanocapsules based on carbon quantum dots (CQDs) were synthesized to interact with crude oil and release an active compound for fluorescence emission. NDs with sizes smaller than 75 nm were found to be compatible with reservoir fluids and demonstrated effectiveness in detecting naturally fractured zones in evaluated wells.
Article
Energy & Fuels
Karol Zapata, Ivan Moncayo-Riascos, Santiago Cespedes, Andres Aguirre-Giraldo, Laura M. Corredor, Henderson Quintero, Eduardo Manrique, Farid B. Cortes, Rafael Ribadeneira, Camilo A. Franco
Summary: This study aimed to develop SiO2 nanoparticles functionalized with amine to inhibit the chemical degradation of partially hydrolyzed polyacrylamide (HPAM) in the presence of different ionic species. The effects of SiO2/amine on the rheological behavior of HPAM solution were evaluated in the presence of monovalent, divalent, and trivalent cations. Molecular simulations showed that the self-folding of HPAM chains increased in brine containing trivalent cations, leading to viscosity loss. The presence of SiO2/amine increased the radius of gyration of the polymer, improving the viscosity of the HPAM solutions. This study opens up possibilities in nanotechnology for enhancing polymer flooding in the oil industry.
Article
Engineering, Chemical
Alirio Benavides, Carlos Zapata, Pedro Benjumea, Camilo A. Franco, Farid B. Cortes, Marco A. Ruiz
Summary: Petroleum-derived gasoline is the most widely used automotive fuel, and its antiknock performance is evaluated using the octane number (ON). Standard methods for measuring ON are expensive and not suitable for field monitoring or online analysis. This study aims to develop and evaluate three empirical methods for predicting ON using MIR spectra, GC-MS, and routine test data.
Article
Chemistry, Multidisciplinary
Daniel Lopez, As A. Rios, Juan D. Marin, Richard D. Zabala, Jaime A. Rincon, Sergio H. Lopera, Camilo A. Franco, Farid B. Cortes
Summary: This study investigates the effect of adding SiO2 nanoparticles on the performance of two commercial wax inhibitor treatments in wax formation and crystallization. The results show that NanoWT with 100 mg·L-1 nanoparticle dosage can effectively reduce the wax appearance temperature and inhibit wax deposition, ensuring flow assurance in unfavorable environments.
Article
Nanoscience & Nanotechnology
Oscar E. Medina, Ivan Moncayo-Riascos, Camilo A. Franco, Farid B. Cortes
Summary: This study aims to expand our understanding of the pyrolysis and catalytic pyrolysis of asphaltenes at low and high pressure through experimental and simulation approaches. The experiments showed that asphaltene reactivity decreases and coke deposition increases with increasing pressure. Catalytic pyrolysis experiments demonstrated that coke is not produced in the high-temperature region, regardless of the system pressure. Molecular dynamic calculations confirmed that asphaltenes mainly react in the high-temperature region and the reaction rate is negatively affected by increasing pressure.
ACS APPLIED NANO MATERIALS
(2023)
Article
Energy & Fuels
Thiago M. Vieira, ezio C. Santana, Luiz F. S. Souza, Renan O. Silva, Tarso Ferreira, Douglas B. Riffel
Summary: Defects in solar cells can reduce their efficiency and reliability. Monitoring techniques like lock-in thermography, electroluminescence, and I-V characteristic curve are utilized to assess the integrity of solar cells. This study proposes a novel experimental procedure for lock-in thermography of solar cells, using sinusoidal electric current excitation to improve defect detection capability. Results show that this approach provides smoother and clearer delimitation of defects compared to conventional methods.
