Article
Energy & Fuels
Daofan Wang, Han Jia, Qiuxia Wang, Xiaolong Wen, Ziwei Wei, Qiang Wang, Fangning Fan, Shijie Wen, Kaihe Lv, Dexin Liu
Summary: In this study, the stability of nonionic surfactant-stabilized foam was improved by using a series of Janus nanoparticles. The researchers found that the PMIE-JS3 system exhibited extraordinary foamability and stabilizing ability at a low concentration. Furthermore, they explored the mechanism behind the foam stability and demonstrated that the PMIE-JS3-stabilized foam remained stable even in the presence of crude oil. Sandpack flooding tests confirmed the effectiveness of the PMIE-JS3-stabilized foam in enhancing oil recovery.
Article
Chemistry, Multidisciplinary
Bjoern K. Birdsong, Billy W. Hoogendoorn, Fritjof Nilsson, Richard L. Andersson, Antonio J. Capezza, Mikael S. Hedenqvist, Stefano Farris, Antonio Guerrero, Richard T. Olsson
Summary: Graphene oxide (GO) was used as a template to synthesize silicon oxide (SiOx) based 2D-nanomaterials with similar morphological features as the GO sheets. By controlled condensation reaction with low concentrations of GO, 2D-nanoflakes consisting of GO-flakes coated with a silica precursor were obtained. The GO template was fully removable without affecting the nanoflake morphology, providing a method for large-scale preparation of SiOx-based 2D nanosheets.
Article
Chemistry, Multidisciplinary
Nanji J. Hadia, Yeap Hung Ng, Ludger Paul Stubbs, Ole Torsaeter
Summary: Surface modification of nanoparticles using a combination of zwitterionic and hydrophilic silanes has been shown to improve stability under high salinity and high temperature conditions. Accelerated stability analysis predicts that the modified nanoparticles can remain stable for at least 6 months, with contact angle measurements indicating potential effectiveness in carbonate reservoirs.
Article
Multidisciplinary Sciences
Mahsa Parhizgar Keradeh, Seyyed Alireza Tabatabaei-Nezhad
Summary: By using the chelating agent DTPA, the salinity of the solution can be reduced and the wettability of the rock can be altered, leading to an increased oil recovery rate. The effective concentration of DTPA is 5 wt%, and changing the rock wettability by increasing the pH value of the solution and reducing the salinity has a significant effect.
Review
Biotechnology & Applied Microbiology
Han Wu, Xin-Fei Xu, Jia-Qi Zhu, Ming-Da Wang, Chao Li, Lei Liang, Hao Xing, Meng-Chao Wu, Feng Shen, Dong-Sheng Huang, Tian Yang
Summary: Mesoporous silica nanoparticles (MSNs) have shown potential in treating hepatocellular carcinoma by activating the immune system in cooperation with adjuvants. Research on MSN-based therapy for liver cancer is still in the exploratory stage, but there is promise for the development of new immunotherapeutic drugs for clinical management in the future.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Bo Wang, Shunping Wang, Huaxue Yan, Yangsong Bai, Yuehui She, Fan Zhang
Summary: In this study, stable bio-nano flooding system was formed by combining bio-nanoparticles reduced by iron-reducing bacteria with biosurfactant produced by Bacillus. The interfacial properties of the system were studied and the efficient oil displacement capability was measured. The concentration and temperature of the nanobiological flooding system were investigated, showing an increase in recovery rate with higher concentration and optimal temperature of 60°C.
Article
Chemistry, Multidisciplinary
Daniel Carneiro Freitas, Italo Odone Mazali, Fernando Aparecido Sigoli, Danielle da Silva Francischini, Marco Aurelio Zezzi Arruda
Summary: This study presents a rapid and environmentally friendly synthesis method for thermodynamically stable silica nanoparticles (SiO2-NPs) using microwave irradiation (MW) compared to conductive heating. The synthesis method is 30 times faster, uses 4 times less reagents, and is approximately 18 times cheaper than conventional synthesis. The synthesized SiO2-NPs were characterized and found to be stable, monodisperse, and amorphous. After adding SiO2-NPs to the soil used for cultivating soybeans, the homeostasis of Cu, Ni, and Zn in soy leaves was evaluated, and the nanoparticles were found to have an impact on the elemental distribution.
Review
Energy & Fuels
Yasin Noruzi, Mohammad Sharifi, Jalal Fahimpour, Maziyar Sabet, Mohammad Akbari, Seyednooroldin Hosseini
Summary: Wettability modification is crucial for enhancing oil recovery from hydrocarbon reservoirs. However, a comprehensive assessment of the interactions involved in this process is still lacking. This article explores the fundamentals of wettability and investigates various mechanisms that influence oil wetness in reservoir rocks. Through in-depth analysis of wettability modification techniques, valuable insights into the mechanisms governing wetting behavior can be gained.
Article
Energy & Fuels
Aref Nafisifar, Abbas Khaksar Manshad, Seyed Reza Shadizadeh
Summary: This research evaluated the EOR potential of a novel nanocomposite and a developed surfactant in the presence of various ions and studied the production enhancement mechanisms using a glass micromodel. It was found that the nanocomposite altered the wettability of an oil-wet carbonate surface to a water-wet one, improving the surfactant's wettability alteration ability. By injecting the desired solutions into the glass micromodel, the optimum concentrations and mechanisms of the nano-chemical EOR method were determined, and the performance of each solution in the porous medium was evaluated.
Article
Energy & Fuels
Bennet Nii Tackie-Otoo, Mohammed Abdalla Ayoub Mohammed, Esther Boateng Owusu
Summary: Amino acid-based surfactants (AASs) and other novel surfactants have gained attention for their environmentally friendly image in surfactant application. However, their potential in enhancing oil recovery has not been well studied. This research investigates the potential of sodium cocoyl alaninate (SCA) for enhanced oil recovery (EOR) and finds that it is more effective than sodium dodecyl sulfate (SDS) in reducing interfacial tension and emulsifying crude oil-brine mixture, altering rock surface wettability, and achieving higher adsorption density and additional oil recovery. Therefore, SCA and other AASs could be outstanding alternatives to conventional EOR surfactants due to their excellent EOR potential and environmental benign nature.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ji Fang, Yingyong Ge, Jun Yu
Summary: This research focused on the influence of mineral particle size and wettability on the froth stability in the flotation process of collophane. Finer mineral particles were found to enhance froth stability, with calcite exhibiting the highest improvement capacity. Wettability of mineral particles also significantly affects froth stability, with optimal contact angles for stabilizing froth around 60-70 degrees.
Article
Chemistry, Multidisciplinary
Xiaomei Zhang, Juan Chen, Yuying Chen, Xing Lin, Bodong Wang, Yifan Liu, Yan Jiang, Hongwen Zhang
Summary: A series of SiO2/silicone rubber composite microspheres were prepared by hydrosilylation, showing a raspberry-like structure and rose petal effect. The water contact angle reached a maximum at 30% SiO2 content, which was the optimal ratio. Surface with dual-size roughness significantly improved hydrophobicity, but the composite microspheres had uneven surface structures.
Article
Chemistry, Multidisciplinary
Magali Benoit, Joel Puibasset, Caroline Bonafos, Nathalie Tarrat
Summary: This study investigates the effect of an amorphous silica matrix on the structure and charge distribution of silver nanoparticles. It reveals that covalent bonding occurs at the interface between the nanoparticles and the matrix, resulting in the transfer of electrons from the nanoparticles to the surrounding silica medium. The electrons lost by the nanoparticles are captured by the Si atoms involved in the interface bonds, as well as unexpected undercoordinated silica defects and atoms in the silica network around the silver nanoparticles. The number of interface bonds and the transferred electrons are proportional to the surface area of the silver nanoparticles.
Article
Chemistry, Multidisciplinary
Alberto Bila, Ole Torsaeter
Summary: Laboratory experiments have shown that nanoparticle (NPs) flooding can lead to higher oil recovery rates, mainly through changes in wettability and reduction of interfacial tension. However, gaps still exist in understanding the interactions induced by NPs. This study investigated the performance of four types of polymer-coated silica NPs in harsh reservoir conditions and found that NP aggregation led to decreased core permeability, affecting oil sweep efficiency.
Review
Energy & Fuels
Abubakar Isah, Muhammad Arif, Amjed Hassan, Mohamed Mahmoud, Stefan Iglauer
Summary: Understanding the interaction between rock and fluid is crucial for the success of enhanced oil recovery (EOR). However, the presence of calcium sulfate minerals, such as anhydrite, significantly affects EOR methods. The effectiveness of oil recovery techniques depends on the distribution and interaction between anhydrite and fluids. This review highlights the factors influencing anhydrite dissolution during EOR and discusses the implications for different EOR fluids. It also examines the prospects and challenges of using various EOR applications in anhydrite-containing reservoirs.
Article
Mechanics
Suresh S. Kumar, Arjun Shyam Sundar, R. Deepak
Summary: The stress intensity factor (SIF) of opposite surface cracks in an un-notched round bar under tension and combined load conditions was determined using a numerical method. The influence of loading modes on SIF was investigated, considering different crack depth ratios and crack aspect ratios. It was found that the SIF distribution changed as the crack depth ratio increased under pure tensile loading, and nonuniform and asymmetric SIF spread was observed when torque was applied. The effect of mode-II and mode-III fractures was more pronounced under combined loading.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Mechanics
U. Magarajan, S. Suresh Kumar
Summary: This paper investigates the ballistic performance of AA6061-B4C surface composite targets fabricated by the Friction Stir Processing (FSP) technique. The paper is divided into two stages: stage I focuses on identifying suitable process parameters, while stage II conducts ballistic experiments for single and multiple hit conditions. The results show that FSPed AA6061-B4C targets exhibit better ballistic performance compared to BM targets.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Materials Science, Multidisciplinary
Rajendran Praveen, Sajja Rama Koteswara Rao, Saurabh Suresh Kumar, Sundaram Suresh Kumar
Summary: The optimum thickness of aluminium alloy 7075 targets and the influence of heat treatment conditions on their high velocity impact response have been determined. Both experimental and numerical studies show that solution treated targets have higher microhardness and better ballistic performance, making them suitable for armored vehicles.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2023)
Review
Rehabilitation
Yohali Burrola-Mendez, Sureshkumar Kamalakannan, Paula W. Rushton, Selsabil-A. Bouziane, Ed Giesbrecht, R. Lee Kirby, Rosemary J. Gowran, David F. Rusaw, Tomasz Tasiemski, Mary Goldberg, Marco Tofani, Jessica P. Pedersen, Jon Pearlman
Summary: This review summarized the research literature on wheelchair service provision education and found limited information on integrating wheelchair content into professional rehabilitation programs. It suggests prioritizing international partnerships, improving the quality and timeliness of training programs, and providing resources for educators to integrate wheelchair-related content.
DISABILITY AND REHABILITATION-ASSISTIVE TECHNOLOGY
(2023)
Article
Environmental Sciences
Jino Lawrence, Vanav Kumar Alagarsamy, Berlin Mohanadhas, Narayanan Natarajan, Mangottiri Vasudevan, Suresh Kumar Govindarajan
Summary: This study investigated the impacts of skin formation on nitrogen species transport in a fracture-matrix aquifer system under non-isothermal conditions using numerical modeling. The results showed that skin formation reduced the migration of nitrogen species at the fracture-matrix interface and decreased the peak concentration of nitrogen in the fracture. Additionally, the presence of skin had a cooling effect for high-temperature influent and deteriorated the propagation of organic nitrogen and nitrate within the fracture. The findings of this study are important for realistic estimation of groundwater contamination risks and the design of biological filters for in situ remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Manojkumar Gudala, Suresh Kumar Govindarajan, Bicheng Yan, Shuyu Sun
Summary: In this study, a fully coupled dynamic THM model was used to compare the advantages and disadvantages of supercritical CO2 (SCCO2) and water as geofluids. Both SCCO2-enhanced geothermal system (EGS) and water-EGS systems exhibited a low-temperature zone, but the spatial expansion was higher in water-EGS. Although SCCO2's spatial expansion aids in geo-sequestration, significant stress and strain invasion was observed near fractures and injection wells. The SCCO2-EGS system showed better thermal breakthrough and geothermal life conditions compared to the water-EGS system. The developed dynamic THM model effectively assesses the behavior of SCCO2-EGS and water-EGS systems, with variations observed in the rock matrix and performance indicators dependent on fluid type, injection/production velocities, initial reservoir pressure, and injection temperature. The advantages of SCCO2-EGS system provide promising results for the geothermal industry as a geofluid. Rated: 8/10
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Public, Environmental & Occupational Health
Nurfaten Hamzah, Kamarul Imran Musa, Muhammad Hibatullah Romli, Xin Wee Chen, Mohd Zulkifli Abdul Rahim, Jafri Malin Abdullah, Mohd Azmi Suliman, Mohd Ismail Ibrahim, Tengku Alina Tengku Ismail, Iliatha Papachristou Nadal, Suresh Kumar Kamalakannan
Summary: The study aimed to translate and validate the CAFU instrument into Malay and test its validity and reliability among informal stroke caregivers in Malaysia. The results showed that the Malay-CAFU questionnaire had good relevancy, satisfactory item-level CVI, and high internal consistency. Therefore, the Malay-CAFU questionnaire is a valid and reliable instrument to assess the dependence level of stroke survivors and the upset level of informal stroke caregivers in Malaysia.
Review
Crystallography
Madunuri Chandra Sekhar, Eshwarappa Veena, Nagasamudram Suresh Kumar, Kadiyala Chandra Babu Naidu, Allam Mallikarjuna, Dudekula Baba Basha
Summary: This paper provides a review on recent advancements in piezoelectric materials and their applications in various fields such as catalysis, energy harvesting, and sensors. It also discusses the limitations of piezoelectric materials.
CRYSTAL RESEARCH AND TECHNOLOGY
(2023)
Article
Pediatrics
Manisha Shrestha, Gopal Bhandari, M. Optom, Sureshkumar Kamalakannan, Gudlavalleti Venkata Satyanarayana Murthy, Suresh Kumar Rathi, Anirudh Gaurang Gudlavalleti, Varun Agiwal, Hira Pant, Binod Pandey, Ramesh Ghimire, Daman Ale, Sajani Kayastha, Rakshya Karki, Daya Shankar Chaudhary, Raghunandan Byanju
Summary: This study aimed to evaluate the effectiveness of counseling and SMS/text messaging and phone calls to improve the follow-up rates among pediatric patients. The results showed that these interventions did not have a significant effect on improving the follow-up rate. However, the study provides useful insights for improving the follow-up rate among children with visual disabilities in Nepal and similar contexts.
JMIR PEDIATRICS AND PARENTING
(2023)
Article
Green & Sustainable Science & Technology
Ahmad Ali AlZubi, Srinivasa Reddy Devarapu, Hannoud Al Moghrabi, Suresh Kumar Govindarajan, D. T. K. Dora
Summary: In this study, bamboo-shaped oxidized multi-walled carbon nanotubes (O-MWCNT) were synthesized from natural gas and reinforced in a silica matrix to create a robust O-MWCNT-silica aerogel. The aerogel was made hydrophobic through surface modification and showed a high specific surface area and porosity. It exhibited hydrophobicity and had a high oil sorption capacity, which could be regenerated multiple times. The synthesized aerogel is a promising adsorbent for oil spill cleaning.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Article
Engineering, Chemical
Srinivasa Reddy Devarapu, Tapas Kumar Dora Dau, Vamsi Krishna Kudapa, Suresh Kumar Govindarajan
Summary: This work presents the development of a compositional model for simulating heavy hydrocarbon flow in porous reservoir systems under non-isothermal conditions. The model is based on mass and energy conservation equations and considers the distribution of natural variables in a multiphase hydrocarbon system. It is validated using thermal profiles from literature and demonstrates high accuracy. The model provides valuable insights for evaluating flow and transport during underground or in-situ combustion processes in energy exploration.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2023)
Article
Engineering, Chemical
Tummuri Naga Venkata Pavan, Srinivasa Reddy Devarapu, Vamsi Krishna Kudapa, Suresh Kumar Govindarajan
Summary: Carbon capture and storage (CCS) technology is considered a feasible solution for reducing CO2 emissions from the burning of fossil fuels in large-scale industries. Deep saline aquifers have been identified as the most suitable formations for storing high volumes of captured CO2 gas. This study developed a numerical model to analyze the factors influencing CO2 migration in both homogeneous and multi-layered deep saline aquifers. The results showed that the saturation distribution and pressure buildup varied between the two cases, with greater gas permeability in the homogeneous formation and lower drainage efficiency in layered formations. The storage efficiency factor was calculated to assess the capacity of the aquifer for storing CO2 gas.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2023)
Article
Energy & Fuels
Viswakanth Kandala, Suresh Kumar Govindarajan
Summary: In the era of renewable energies and the pandemic-affected world, oil industries are seeking cost-effective and eco-friendly enhanced oil recovery (EOR) techniques. This study focuses on low-salinity water flooding (LSWF) and its impact on oil recovery in clayey sandstones. The developed mathematical model includes a fluid transport model, an ion transport module considering multi-ion exchange (MIE), and a model for interpolation between low- and high-saline states. The results show that diluting the concentration of Ca2+ and Mg2+ ions in injection water can enhance oil recovery in clayey sandstone reservoirs.
JOURNAL OF ENERGY ENGINEERING
(2023)
Article
Chemistry, Physical
G. Velmurugan, Jasgurpreet Singh Chohan, S. A. Muhammed Abraar, R. Sathish, S. Senthil Murugan, M. Nagaraj, S. Suresh Kumar, V. Siva Shankar, D. Elil Raja
Summary: Natural fibre-based nanocomposite is a revolutionary material with excellent strength-to-weight ratio and lightweight, widely used in construction and dynamic industries. This study investigated the effects of silicon nanoparticles on the moisture absorption, mechanical properties, flammability, and dynamic mechanical behavior of PP/jute fibre composites. The results showed that increasing the weight of SiO2 nanoparticles improved the modulus of elasticity, tension strength, and elongation at breakage of the composites. The addition of SiO2 nanoparticles also enhanced the fire characteristics and dynamic mechanical behavior. However, the dispersion of SiO2 nanoparticles in the composites needs to be improved.
Article
Engineering, Environmental
Krishna Raghav Chaturvedi, Tushar Sharma, Japan Trivedi, G. Suresh Kumar
Summary: This study demonstrates the technical feasibility of recovering CH4 from a natural gas hydrate reservoir using a mixture of gases (CO2+N2) with a low concentration of H2 as a diluent in marine settings. The findings emphasize the importance of the gas injection ratio for CH4 recovery.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
