Article
Materials Science, Multidisciplinary
Shuhei Kanazawa, Yasuhiro Yamada, Satoshi Sato
Summary: Graphene nanoribbons (GNR) with adjustable band gap have attracted attention for their properties. The introduction of sp(3)C-H on GNR edges can alter the peak positions of sp(2)C-H on the aromatic edges.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Energy & Fuels
Jingyu Zhao, Yueyan Xiao, Jiajia Song, Shiping Lu, Chi -Min Shu
Summary: The study aims to reveal the evolution of microstructures and coal spontaneous combustion mechanisms during natural oxidation. This information is beneficial to mine safety engineers and risk management professionals. It can lead to improved early warning detection and the development of CSC retardant materials.
Article
Optics
Jeremy Xuan Yu Chew, Zi Heng Lim, Y. Qi, Guangcan Zhou, Guangya Zhou
Summary: Infrared devices are increasingly used in various applications. This paper introduces a novel dispersive spectrometer that has high-throughput and decoupled spectral resolution. The proposed spectrometer utilizes a two-stage Hadamard transform encoding process to increase the signal-to-noise ratio. With a single-pixel detector, the system can be easily implemented in other desired wavelengths. Additionally, a method is developed to remove the need for uniform illumination and improve the ease of device design for in situ measurement.
Article
Instruments & Instrumentation
Lucia M. Lepodise, Roger A. Lewis, Evan Constable, Elise Pogson, Stephen D. Joseph, Josip Horvat
Summary: Terra preta, a fertile anthropogenic soil found in the Amazon basin, is rich in aromatic carbons, which differentiates it from surrounding soils. The study conducted Fourier transform infrared spectroscopy and found that the spectra of terra preta and organic fertilizers were similar in the 150-500 cm(-1) range, but different from natural soils. This suggests that the content of aromatic carbons in terra preta and organic fertilizers is distinct from soils containing bushfire chars and those produced solely by bacterial and fungal activities, highlighting the importance of biochar preparation conditions.
APPLIED SPECTROSCOPY
(2022)
Article
Energy & Fuels
Jianxin Li, Jienan Pan, Xianglong Wang, Kai Wang, Shuai Nie, Di Gao
Summary: CO2 sequestration with enhanced coalbed methane recovery (CO2-ECBM) is a promising technology for mitigating CO2 emissions. Injecting CO2 into the coal can change its macromolecular structure, reducing the content of oxygen-containing functional groups and -CH2-, and affecting the properties of the coal reservoir, such as porosity, permeability, and mechanical characteristics.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Yulin Pu, Shanxin Lang, Aobo Wang, Shirong Zhang, Ting Li, Hongyu Qian, Guiyig Wang, Yongxia Jia, Xiaoxun Xu, Dagang Yuan, Yun Li
Summary: The study found that after marsh degradation, the SOC content in the soil aggregates significantly decreased, while the micro-aggregate content increased. Marsh degradation also led to a decrease in the relative ratio of aliphatic-C and an increase in that of alcohol and phenolic-C, as well as polysaccharide-C.
Article
Chemistry, Physical
Li Jiguang, Guo Xin, Shen Haiping, Cai Xinheng, Dong Ming, Hou Huandi
Summary: Different vacuums residues from China and the Middle East were tested for solubility in toluene and heptane mixtures, with structural differences being identified as the main factor influencing solubility variations.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Geosciences, Multidisciplinary
Zahra Sadeghtabaghi, Ahmad Reza Rabbani, Abdolhossein Hemmati-sarapardeh
Summary: This study analyzes asphaltene fractions of 13 crude oil samples from the Iranian sector of the Persian Gulf region using X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). The results show that asphaltene structural parameters can be used for oil-oil correlation purposes and are in accord with previous classifications. XRD parameters, specifically plots of various structural parameters, are effective for distinguishing genetic groups, with the XRD method found to be more accurate compared to FTIR. Additionally, decision tree classification based on XRD data accurately distinguishes genetic groups and determines characteristics of each group.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Agronomy
Rahul Joshi, Ramaraj Sathasivam, Sang Un Park, Hongseok Lee, Moon S. Kim, Insuck Baek, Byoung-Kwan Cho
Summary: This study utilized FT-IR spectroscopy to perform non-destructive measurements of phenolic compounds in moringa powder, and compared the prediction performance of three different regression methods. The results showed that the PLS regression method had the best performance in predicting phenolic compounds in moringa powder.
Article
Energy & Fuels
Mary J. Thomas, Hugh E. Jones, Diana Catalina Palacio Lozano, Remy Gavard, Shaun Carney, Mark P. Barrow
Summary: This study analyzed the asphaltene fractions of eight HFOs using FTICR MS, revealing their differing behavior. Fragmentation experiments using IRMPD on a specific mass region allowed comparison of the relative heteroatom content and degree of alkylation in the asphaltene cores and aromatic moieties.
Article
Chemistry, Physical
Malayil Gopalan Sibi, Muhammad Kashif Khan, Deepak Verma, Wonjoong Yoon, Jaehoon Kim
Summary: This study presents a tandem catalyst that can efficiently convert CO2 to BTEX. The selectivity of the catalyst towards the desired products was controlled by adjusting the nature of the acid sites in the zeolite and the proximity between the Fe-based and zeolitic active sites. In situ operando experiments revealed the role of the catalyst in multiple reaction steps.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Biochemistry & Molecular Biology
Maria Teresa Caccamo, Salvatore Magazu
Summary: The aim of this study is to investigate the hydration properties of glucose and its hydrogen bond network in glucose-water mixtures. The temperature behavior of these mixtures was characterized using Fourier Transform InfraRed (FTIR) spectroscopy, specifically by analyzing the intramolecular OH stretching mode in the spectral range of 3000-3700 cm(-1) through the evaluation of Spectral Distance (SD). The results obtained were consistent with literature data, showing a maximum strength of the hydrogen bond network at a specific concentration value.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Applied
Leandro da Rocha Novaes, Argimiro Resende Secchi, Vera Maria Martins Salim, Neuman Solange de Resende
Summary: This study explores the relationship between feed properties, operating conditions, and deactivation phenomenon during middle distillates hydroprocessing. An accelerated deactivation methodology was employed to study this phenomenon. The results show that 100 hours of operation is needed for the initial deactivation during the stabilization step. Easy and portable tools, such as Fourier Transform Infrared analysis and density measurements, were successfully used to monitor and evaluate the hydrotreating process. It was also found that feedstock properties can directly influence the deactivation phenomenon, and process modifications can be identified using Fourier Transform Infrared analysis.
Article
Engineering, Electrical & Electronic
Moussa Faress, Said Fahlaoui
Summary: In this paper, the Gabor transform and its properties are introduced using the basic properties of Damek-Ricci spaces and its Fourier transform. Furthermore, the uncertainty principle of Donoho-Stark is generalized to this solvable extension of H-type group.
CIRCUITS SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Food Science & Technology
Fengying Chen, Min Zhang, Sakamon Devahastin, Dongxing Yu
Summary: This study demonstrates that laser perforation and ultrasonic pretreatments can improve the drying rate and rehydration capacity of blueberries, reduce shrinkage, and have positive effects on the color and chemical components of the dried fruit.
FOOD AND BIOPROCESS TECHNOLOGY
(2021)
Article
Energy & Fuels
Hamed Farhadi, Mobeen Fatemi, Shahab Ayatollahi
Summary: Low salinity water flooding (LSWF) has the potential to enhance oil recovery by affecting fluid-fluid and rock-fluid interactions. The study found that the short-term effect of reducing interfacial tension and the long-term effect of altering wettability are the dominant mechanisms influencing recovery efficiency.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Mohammad Fattahi Mehraban, Shahab Ayatollahi, Mohammad Sharifi
Summary: This study evaluates the synergic effect of salinity and pH on the wettability state of carbonate rocks through adhesion bottle tests. The experimental results show that achieving a non-adhesion state during Low Salinity Water Injection is easier compared to high salinity water injection. Additionally, the wettability of rock particles is influenced by the rock mineralogy effect in higher pH values, while the crude oil effect plays a role in lower pH ranges.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Rasoul Mokhtari, Ali Hosseini, Mobeen Fatemi, Simon Ivar Andersen, Shahab Ayatollahi
Summary: This study investigates the effect of brine salinity on asphaltene precipitation and destabilization mechanisms during water-flooding in oil reservoirs. The findings suggest that the precipitation mechanism of asphaltene depends on brine salinity, with ions possibly playing a key role in promoting asphaltene precipitation under high salinity conditions.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Arash Pourakaberian, Shahab Ayatollahi, Maysam Mohammadzadeh Shirazi, Cyrus Ghotbi, Hossein Sisakhti
Summary: Acidizing is commonly used in oil wells to enhance reservoir performance. Before each acidizing job, compatibility tests are needed to determine optimal inhibitor dosages. A modified testing procedure and database have been developed for predicting sludge formation potential in crude samples.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Reza Khoramian, Riyaz Kharrat, Saeed Golshokooh
Summary: A novel nanofluid has been developed by conjugating an anionic surfactant to graphene oxide nanosheets, which shows improved stability and applicability. The nanofluid has high salinity, alters oil wettability, and reduces interfacial tension, leading to higher oil recovery.
Article
Energy & Fuels
Ronald Gugl, Riyaz Kharrat, Ali Shariat, Holger Ott
Summary: The study found that foam-assisted water-alternating gas injection is more effective than water-alternating gas injection in the recovery of gas-invaded fractured reservoirs. The foam reduces the gas mobility and directs the gas from the fractures into the matrix blocks, resulting in improved oil recovery. The properties of the fractures and matrix also have a significant impact on the recovery, particularly the permeability of the fractures.
Article
Energy & Fuels
Milos Pejic, Riyaz Kharrat, Ali Kadkhodaie, Siroos Azizmohammadi, Holger Ott
Summary: This study focuses on the impact of natural fractures on production performance of reservoirs. Different fracture types and their extents were studied and found to play a crucial role in reservoir production. The study also observed different impacts of fractures in secondary recovery methods like waterflooding and gas injection. The findings improve the understanding of fracture networks' impact on oil recovery and the history matching process.
Article
Chemistry, Multidisciplinary
Reza Khoramian, Riyaz Kharrat, Peyman Pourafshary, Saeed Golshokooh, Fatemeh Hashemi
Summary: Organic surfactants have been used with different nanoparticles in enhanced oil recovery (EOR) operations. This study introduces a natural and cost-effective surfactant called Azarboo for modifying the surface traits of silica nanoparticles. The hybrid application of Azarboo surfactant and amine-modified silica nanoparticles led to improved wettability and higher oil recovery.
Review
Energy & Fuels
Riyaz Kharrat, Holger Ott
Summary: Understanding and characterizing naturally fractured reservoirs is crucial for optimizing oil recovery methods and improving reservoir management.
Article
Biochemistry & Molecular Biology
Armin Abbaspour, Arezou Jafari, Delaram Sadat Tarahomi, Seyyed Mohammad Mousavi, Riyaz Kharrat
Summary: Using Printed Circuit Boards (PCBs) powder as an additive in the growth medium increased the biopolymer production rate by 11 times compared to a pure growth medium. Characterization analysis revealed that the produced biopolymer has high thermal resistivity and a viscosity 3 times higher than water. The glass micromodel flooding test showed that a 0.5 wt% concentration of the biopolymer solution achieved a recovery rate of 42%, which was 24% higher than water flooding.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Water Resources
Matin Bagheri, Hassan Mahani, Shahab Ayatollahi, Davood Zivar
Summary: This paper investigates the flow dynamics of hydrogen-water in aquifers, focusing on the effects of flow regime, compressibility, and hysteresis on the efficiency of hydrogen storage and recovery. The results show that a medium flow rate can minimize trapping mechanisms and improve the storability and recovery factor of hydrogen.
ADVANCES IN WATER RESOURCES
(2023)
Article
Energy & Fuels
Riyaz Kharrat, Nouri Alalim, Holger Ott
Summary: This study investigated the impact of hierarchical fracture networks on the production performance of gas-based enhanced oil recovery methods in a fractured reservoir with low matrix permeability and well-connected fractures. The results showed that the description of fracture networks had different sensitivity on the production performance of EOR methods, and the significance of medium and minor fracture networks decreased with the increase of intensity ratio.
Article
Energy & Fuels
Meysam Golmohammadi, Hassan Mahani, Shahab Ayatollahi
Summary: Despite numerous studies, a robust predictive capability for low-salinity waterflooding (LSWF) technique has not been established yet. This study aims at proposing a set of screening methods that offer the best LSWF predictive capability for various crude oil-brine-carbonate rock systems. The findings suggest that methods involving rock explicitly can capture the rock-type dependency of LSE more robustly.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Masoud Karimi, Shahab Ayatollahi
Summary: A new mechanistic approach is presented to predict radial flow acidizing up to near wellbore scale by considering the vital effects of porous media size and geometrical parameters of wormhole patterns. This model, validated using radial acid experiments, can quickly predict wormhole propagation rate without requiring excess up-scaling data and reduce the number of required experiments.
GEOENERGY SCIENCE AND ENGINEERING
(2023)