Review
Biotechnology & Applied Microbiology
Marcia Nitschke, Crisiane Aparecida Marangon
Summary: The interest in utilizing microbial-derived molecules, particularly biosurfactants, in the synthesis of nano-sized materials has been growing rapidly. Biosurfactants offer advantages such as eco-friendliness, low toxicity, biocompatibility, and structural diversity, making them versatile in various applications including biomedical and environmental fields.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2022)
Article
Thermodynamics
Qiang Zhang, Junjie Zheng, Baoyong Zhang, Praveen Linga
Summary: Coalbed methane recovery is crucial for coal mine safety, reducing greenhouse gas emissions, and economic benefits. Gas hydrate technology can effectively separate CH4 from N2-rich coal mine gas. The synergistic effect of sII hydrate promoters and amino acids was examined for enhancing hydrate formation kinetics, separation performance, and CH4 recovery. Amino acids showed significant promotion effects, particularly for the propane system, and improved kinetics by over 10 times. CP-amino acid systems demonstrated excellent separation performance, increasing CH4 content from 30% to 70%. THF-amino acid systems achieved the highest CH4 recovery of up to 50.27%. The impact of amino acids varied depending on the system, and two possible mechanisms, including interfacial tension alteration and amino acid hydrophobicity, were discussed. These insights provide a basis for optimizing the hydrate process for coalbed methane recovery and other applications.
Review
Chemistry, Applied
Subi Yoosuf, Prajith Nambiar
Summary: Nanoemulsions have practical applications due to their small particle size, stability, and enhanced bioavailability. Conventional surfactants used in nanoemulsion formulations have associated risks, while microbial biosurfactants offer advantages in terms of stability and drug release. However, there is a lack of research on the combination of biosurfactants and functional drugs in nanoemulsions.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2023)
Article
Chemistry, Multidisciplinary
Lanyun Wang, Xiaoran Lu, Yongliang Xu
Summary: This study found that adding 5-10% RNS-A can shorten the induction time during CO2 hydrate formation, and 6% RNS-A showed the best gas consumption and reaction time, making it the optimal concentration for CO2 capture and sequestration.
Article
Engineering, Chemical
Fan Yu, Yulu Du, Mingda Guo, Mengqian Zhao, Li Luo, Tianyou Cui, Shengyuan Deng, Mingjie Jin, Zhengyong Lyu, Xuwei Long
Summary: This study demonstrates the efficient removal of heavy metals from contaminated soil using biosurfactant surfactin through a micellar-enhanced ultrafiltration (MEUF) process. The surfactin can bind heavy metals through electrostatic interactions and then be rejected by the ultrafiltration membranes, resulting in over 98% removal of metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Veronica Segovia, Antonio Reyes, Gildardo Rivera, Pedro Vazquez, Gonzalo Velazquez, Alma Paz-Gonzalez, Regina Hernandez-Gama
Summary: This study focused on producing and characterizing biosurfactants using Thermoanaerobacter sp. CM-CNRG TB177 strain, and evaluating the impact of different carbon and nitrogen sources on the surfactant's ability to reduce water surface tension. The results showed that the strain produces a rhamnolipid mixture, with molasses as a carbon source significantly affecting the surfactant's efficiency. Additionally, it was found that the microorganism requires yeast extract as a nitrogen source for growth, and this study provides the first description of biosurfactant produced by bacteria of the Thermoanaerobacter genus.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Article
Energy & Fuels
Yulia F. Chirkova, Andrey S. Stoporev, Roman S. Pavelyev, Mikhail A. Varfolomeev
Summary: In recent years, interest in gas hydrates has grown due to their potential as an energy source and environmentally friendly alternative to storing and transporting natural gas. This study compared the effectiveness of sulfonated castor oil (SCO) and sodium dodecyl sulfate (SDS) as promoting reagents in the formation and decomposition of methane and methane-propane hydrates in a porous medium. The results showed that SCO significantly improved the water conversion rate in methane hydrates due to enhanced mass transfer in the presence of surfactants, while the effect on methane-propane hydrates was limited. Both SCO and SDS accelerated hydrate formation, but SCO required less supercooling. These findings suggest that SCO is comparable to SDS in promoting activity in porous media with varying water saturation.
Article
Thermodynamics
Lingli Shi, Yong He, Jingsheng Lu, Guodong Hou, Deqing Liang
Summary: The mixed biosurfactants showed excellent anti-agglomeration effect by greatly reducing the force needed for system flow and decreasing the dosage needed for anti-agglomeration through synergistic effect. Additionally, they could accelerate gas dissolution process without significantly altering hydrate growth rate, contributing to preventing hydrate blockage in oil and gas system.
Article
Engineering, Environmental
Byeonggwan Lee, Kyuchul Shin, Sanehiro Muromachi, Igor L. Moudrakovski, Christopher I. Ratcliffe, John A. Ripmeester
Summary: Antifreezes such as methanol and ammonia can enhance methane storage in binary clathrate hydrates like THF and TBAB. Methanol acts as a catalyst for methane hydrate formation and induces TBAB hydrates to form an orthorhombic structure suitable for methane storage. These findings suggest that methanol could play a crucial role in hydrate-based methane storage systems.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Brian Gidudu, Evans M. Nkhalambayausi Chirwa
Summary: This study discovered that Pseudomonas aeruginosa strain could produce biosurfactants in an electrochemical environment, but the survival and yield were affected by the intensity of the electric field applied, with the highest current leading to bacterial inactivation and elimination.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Energy & Fuels
O. S. Gaidukova, V. V. Dorokhov, S. Y. Misyura, V. S. Morozov, N. E. Shlegel, P. A. Strizhak
Summary: The dissociation and combustion of methane hydrate samples were experimentally studied under different thermal conditions. The synergistic effects of simultaneously dissociating methane and carbon dioxide hydrates were analyzed. It was found that ignition of methane hydrate granules was faster than tablets, and increasing the combustion chamber temperature improved the ignition performance of tablets.
Article
Energy & Fuels
Alejandro Bello-Palacios, Per Fotland, Geir Ersland
Summary: This study investigates the relationships between sedimentation rate, transport properties, and the formation and evolution of hydrates in fine-grained marine sediments, as well as their corresponding BSR responses. Through one-dimensional simulations, the study models the flow and transport of mass and heat through porous media during sedimentation. The results show that sedimentation affects the geothermal gradient and the stability zone of gas hydrates, leading to changes in the distribution of phases and the relocation of the base of the GHSZ over geological time.
Article
Thermodynamics
Elaheh Sadeh, Abdolreza Farhadian, Abolfazl Mohammadi, Mina Maddah, Mahdi Pourfath, Mingjun Yang
Summary: The increased energy demand and population growth have resulted in a significant rise in atmospheric carbon dioxide (CO2). Natural gas and carbon capture and storage are crucial for efficient management. Gas hydrates have potential for CO2 capture and energy storage, but their slow formation kinetics have limited commercial usage. In this study, a novel anionic surfactant called aconitic acid (ASA) was developed to improve the formation kinetics of methane and CO2 hydrates. The experiments showed that even at low concentrations, ASA significantly enhanced the formation kinetics of methane hydrates. Molecular dynamics simulations revealed that ASA molecules increased the solubility of gas molecules in the solution, leading to enhanced hydrate growth. Furthermore, no foam formation occurred in the ASA solution at high concentrations. These findings highlight the potential of ASA as an efficient and foamless gas hydrate promoter for methane storage and CO2 capture applications.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Environmental Sciences
Arulazhagan Pugazhendi, Mamdoh T. Jamal, Bandar A. Al-Mur, Rajesh Banu Jeyakumar, Gopalakrishnan Kumar
Summary: This study successfully increased the liquefaction efficiency and hydrogen production of Ulva reticulata biomass by the combinative pretreatment of mechanical and biosurfactant.
Article
Nanoscience & Nanotechnology
Yang Zhao, Mingzhao Yang, Man Li, Hongsheng Dong, Yang Ge, Qingping Li, Lunxiang Zhang, Yu Liu, Lei Yang, Yongchen Song, Jiafei Zhao
Summary: Efficient gas enrichment methods are crucial for the storage, transportation, and sequestration of clean energy and carbon dioxide. A novel recyclable hydrate promoter has been developed, which effectively reduces the induction time of methane hydrate formation, increases gas storage capacity, and inhibits foam during hydrate decomposition. Additionally, this promoter enhances CO2 storage capacity and shows potential for sequestering CO2 in the form of gas hydrate under the seafloor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Srawanti Medhi, Satyajit Chowdhury, Jitendra S. Sangwai, Dharmender Kumar Gupta
Summary: This study investigated the effect of aluminum oxide nanoparticles on the properties of salt-polymer-based drilling fluids. The addition of aluminum oxide nanoparticles improved the rheological properties, fluid loss control, and viscoelastic properties of the drilling fluid.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Energy & Fuels
Rohan M. Jadhav, Ganesh Kumar, N. Balasubramanian, Jitendra S. Sangwai
Summary: This study investigates the synergistic effect of nickel nanoparticles and solvent tetralin on the rheological properties and composition of extra-heavy crude oil, revealing that the addition of 0.2 wt% nickel nanoparticles can significantly reduce the viscosity of oil. Aquathermal upgrading of EHO was conducted with nanoparticles, confirming the catalytic properties of nickel nanoparticles in upgrading EHO through tests such as FT-IR, GC-MS, and SARA characterization. Additionally, a new mechanism describing the dynamics of nickel nanoparticles in contact with asphaltene clusters has been proposed for better understanding.
Article
Engineering, Chemical
Chandan Sahu, Anirbid Sircar, Jitendra S. Sangwai, Rajnish Kumar
Summary: This study investigates the impact of organic aliphatic amines on CO2 hydrate kinetics and finds that the additives significantly promote nucleation time, with decylamine showing the best CO2 absorption performance. The study also proposes a suitable well design for enhanced CO2 sequestration as solid hydrates in subsea sediments.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Review
Engineering, Chemical
Satyajit Chowdhury, Saket Shrivastava, Abhijit Kakati, Jitendra S. Sangwai
Summary: This review provides a detailed discussion on the properties and influencing factors of surfactants used in chemical enhanced oil recovery (cEOR), as well as the effects of different types of surfactants on oil recovery. Additionally, emerging surfactant flooding aids and their mechanisms, such as nanotechnology applications and surfactant-low salinity water flooding, are highlighted. The challenges faced by the industry in implementing surfactant cEOR are also outlined.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Chandan Sahu, Anirbid Sircar, Jitendra S. Sangwai, Rajnish Kumar
Summary: This study focuses on the kinetics of CO2 hydrate formation in both pure water and seawater, with the use of low-concentration inorganic emulsifiers STPP and TSPP. The results demonstrate that STPP significantly improves the induction time and CO2 gas uptake, as well as the rate of hydrate formation.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Energy & Fuels
Jitendra S. Sangwai, Siddhant Kumar Prasad
Summary: Investigating the effects of surfactant concentration and droplet size distribution on the rheology of water-in-oil emulsion systems is important for understanding the antiagglomeration properties and finding suitable strategies for flow assurance issues. This study focuses on the rheological characterization of hydrate slurries with a mixed surfactant system and demonstrates that the presence of surfactants can increase the viscosity of the slurries up to a certain concentration, but higher concentrations can reduce viscosity and act as antiagglomerants.
Article
Thermodynamics
Jugal N. Anil, Dnyaneshwar R. Bhawangirkar, Jitendra S. Sangwai
Summary: This study presents a thermodynamic model for predicting the phase equilibria of gas hydrates using an Equation of State (EOS) and an Activity Coefficient Model (ACM). Different combinations of EOS and ACM were examined to improve the accuracy of hydrate prediction. The model showed significant improvement in predicting sII hydrates and some combinations demonstrated good performance for different compounds.
FLUID PHASE EQUILIBRIA
(2022)
Article
Energy & Fuels
N. Sakthipriya, Mukesh Doble, Jitendra S. Sangwai
Summary: The research aims to analyze the impact of microbial activity and the synergetic effect of microbial interaction, pressure, and temperature on the viscosity of crude oil in high-pressure environments. By studying the application of Bacillus subtilis at various temperatures and pressures, it was found that the bacterium effectively reduced the viscosity of waxy crude oil. The proposed model incorporating thermodynamic and microbial kinetics provided satisfactory predictions for the viscosity of crude oil during microbial degradation, demonstrating the suitability of Bacillus subtilis in crude oil production and transportation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Uma Sankar Behera, Jitendra S. Sangwai
Summary: The study explores the use of a novel silica-based hybrid nanofluid for enhanced oil recovery in matured oil reservoirs. The hybrid nanofluid alters the interfacial properties of the rock-oil-water systems, resulting in a shift from water-wet to strongly water-wet sand surfaces and thereby increasing oil recovery.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Uma Sankar Behera, Ganesh Kumar, Jitendra S. Sangwai
Summary: Oil recovery from matured oilfields is challenging, and low-salinity water (LSW)-based enhanced oil recovery (EOR) methods can help improve the recovery. In this study, experiments were conducted to understand the oil displacement phenomena using nanofluids. The results showed that increasing the concentration of nanoparticles in the nanofluids improved oil displacement, but there was a slight decrease beyond 1000 ppm.
Article
Environmental Sciences
Satyajit Chowdhury, Mayank Rakesh, Srawanti Medhi, Japan Trivedi, Jitendra S. Sangwai
Summary: This study examines the behavior of supercritical CO2 (sc-CO2) under different temperature and pressure conditions, and finds that sc-CO2 sequestration is more effective in light oil reservoirs, while higher pressures enhance sequestration or oil recovery in heavy oil reservoirs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Ceramics
Vimal Kumar Dewangan, T. S. Sampath Kumar, Mukesh Doble, Viju Daniel Varghese
Summary: A novel injectable macroporous apatite bone cement derived from eggshell was developed using gelatin and chitosan as a biopolymeric solution, along with disodium hydrogen phosphate and acetic acid. The cement exhibited good injectability, stability, and degradation properties, and showed potential for repairing low or non-load bearing defects in orthopaedic applications.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Chemical
Satyajit Chowdhury, Mayank Rakesh, Jitendra S. Sangwai
Summary: Injecting fluids during the secondary and tertiary stages of oil production can greatly enhance the total recovery of crude oil. The process of improving vertical and areal sweep efficiency is influenced by viscous and capillary forces. In addition to reservoir rock properties, the properties of reservoir and displacing fluids also play a crucial role in enhanced oil recovery.
INDIAN CHEMICAL ENGINEER
(2023)
Article
Energy & Fuels
Siddhant Kumar Prasad, Jitendra S. Sangwai
Summary: This study investigated the impact of chain length of saturated hydrocarbons on methane hydrate formation and dissociation kinetics in oil-in-water dispersions. Sodium dodecyl sulfate was used as a surfactant to simulate natural surfactants. The results showed that an appropriate concentration of SDS enhanced the hydrate formation during initial stages, but higher concentrations disrupted the structure of local water. With a fixed SDS concentration, higher carbon chain length accelerated the hydrate formation during initial stages before reaching similar formation kinetics. Higher concentrations and higher alkane content delayed the gas release during dissociation.
Article
Thermodynamics
Rahul Sarkhel, Chandan Sahu, Rajnish Kumar, Jitendra S. Sangwai
Summary: This study investigates the inhibitory effects of alkalis on methane hydrate formation and finds that sodium hydroxide performs better as an inhibitor. A simple model based on the vdW-P thermodynamic model accurately predicts the phase equilibrium of methane hydrate in the presence of alkali solutions. This research is important for designing efficient and cost-effective thermodynamic inhibitors for methane hydrate in the oil and gas industry.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2023)
