Article
Energy & Fuels
Sedi Helsper, Matthew W. Liberatore
Summary: Increasing oil production from cold environments has led to flow assurance issues caused by wax deposition and hydrate formation. This study investigates the high-pressure flow properties of waxy oils and finds that wax concentration has a larger effect on wax appearance temperature than pressure. Understanding waxy oil rheology under methane-saturated, high-pressure conditions is crucial for addressing flow assurance challenges in cold environments.
Article
Energy & Fuels
Oualid M'barki, John Clements, Luis Salazar, James Machac, Quoc P. Nguyen
Summary: Wax crystallization is a major issue in flow assurance. Paraffin inhibitors can reduce wax appearance temperature and prevent gelation, deposit formation, and pipeline blockage. The efficacy of inhibitors depends on their chemical structure and the properties of the crude oil. In this study, maleic anhydride-a olefin comb copolymer-based inhibitors with alkyl side chains were tested. The results showed that inhibitors with ester attachment of the alkyl side chains were more effective in reducing wax appearance temperature and oil viscosity. Asphaltenes also acted as natural inhibitors. Further research is needed to study inhibitors with different structural features and evaluate their efficacy.
Article
Acoustics
Daechul Kim, Sungryul Shin, Wookeen Chung, Jong-Se Lim, Dong-Gun Lee, Dae-Mo Lee, Jiho Ha
Summary: The phenomenon of wax deposition in crude oil transportation pipelines can cause extensive damage. Therefore, it is essential to monitor flow assurance by estimating the wax appearance temperature (WAT) of the produced crude oil. This study proposes a method for determining WAT through ultrasonic characteristics analysis and confirms its high reliability through experiments.
Article
Agricultural Engineering
Sandeep Das, Nandita Das, Kamlesh Choure, Piyush Pandey
Summary: Bacteria isolated from crude oil contaminated soil were tested for their hydrocarbon degradation efficiency and biosurfactant production. Two Bacillus spp. showed high potential for asphaltene degradation. B. thuringeinsis SSL1 is recommended for effective breakdown of asphaltene, aiding in crude oil cleanup.
BIORESOURCE TECHNOLOGY
(2023)
Article
Mechanics
Sedi Helsper, Abdualbaset A. Ali, Matthew W. Liberatore
Summary: The study found that shear rate, cooling rate, and wax concentration affect the wax appearance temperature, with shear rate having a relatively small impact on WAT. Different fluid characteristics influence the change in yield stress upon wax formation. Adding shear rate to the phase diagrams of waxy oils could help address flow assurance needs in the industry.
Article
Energy & Fuels
Liang Wang, Yifei Wang
Summary: By using numerical calculation and simulation to study the effects of different fin thickness, fin space, and the number of ducts on the heat storage and release process of paraffin, it is found that optimized parameters can improve the performance of the paraffin regenerator, showing the significant role of heat transfer between air and paraffin. The best combination regenerator can maintain indoor heating for eight hours with its melting degree and released heat.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Qibin Li, Jinchen Cao, Yang Liu, Qinglin Cheng, Chao Liu
Summary: The study found that the impact of dispersed water on the paraffin crystallization behavior in waxy crude oil is complex, altering nucleation processes and crystal structure formation rates, as well as leading to changes in the wax appearance temperature.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Mohammad Mir, Somayeh Ghasemirad
Summary: This research focuses on the phase inversion emulsification of paraffin oil/high-density polyethylene wax (PEW) blend in water using mixed surfactant systems. The usage of gemini surfactants in the emulsification process is found to be more effective compared to monomeric surfactants. The results show that the change in water phase volume fraction at the phase inversion point is in accordance with the change in interfacial tension between the water phase and the oil phase. The usage of mixed monomeric/gemini surfactant systems leads to larger zeta potentials, comparable drop sizes, and higher long-term stability of the emulsions.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Jinchen Cao, Lang Liu, Chao Liu, Chao He
Summary: Molecular dynamics simulations were used to investigate the phase change mechanisms of paraffin wax in crude oil. It was observed that in the absence of a pour point depressant, paraffin crystals formed tangled three-dimensional networks that are difficult to dissolve in the oil phase. The viscosity and phase transition temperature of the system increased with the chain length of paraffin molecules. The addition of a pour point depressant prevented the formation of insoluble networks and resulted in homogeneously distributed paraffin crystals with lower viscosity and phase transition point.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Microbiology
Bo Wu, Jianlong Xiu, Li Yu, Lixin Huang, Lina Yi, Yuandong Ma
Summary: This study aimed to investigate the promotion effect of defined co-culture of Bacillus subtilis and Pseudomonas aeruginosa on the biodegradation of crude oil. The results showed that after 3 days of defined co-culture, the residual oil and saturated and aromatic fraction in the samples were significantly reduced, and the degradation efficiency of crude oil was improved from 32.61% and 54.35% in individual culture to 63.05%. Furthermore, the defined co-culture system exhibited relatively excellent performance in bacterial growth, cell surface hydrophobicity, and emulsification activity. These findings suggest that the combination of Bacillus subtilis and Pseudomonas aeruginosa can effectively promote the degradation and utilization of crude oil.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Engineering, Environmental
Yue Liu, Junhui Zhang, Shaoqi Yang, Huizhen Yang
Summary: This study aimed to investigate the feasibility of using bacterial strains isolated from oily sludge and wastewater for the biodegradation and removal of heavy oil from oily sludge, as well as evaluate their potential for bioremediation of oily sludge-contaminated soils. Six oil-degrading bacteria were isolated, and three strains showed excellent oil displacement activity. The results demonstrate the potential of Pseudomonas sp. and Bacillus spp. as candidate strains for use in oily sludge bioremediation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Junhui Zhang, Wendi Feng, Quanhong Xue
Summary: This study isolated a bacterial strain capable of producing biosurfactant and degrading oil. The strain demonstrated high stability of the biosurfactant under extreme conditions and showed potential for enhancing heavy oil recovery by transforming the composition of the oil.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2022)
Article
Energy & Fuels
Subbarama Kousik Suraparaju, Arivazhagan Sampathkumar, Sendhil Kumar Natarajan
Summary: The purpose of this study is to develop a novel composite thermal energy storage system (CTESS) using blends of used cooking oil (UCO) and paraffin wax (PW) and experimentally investigate its effect on the performance of solar still for effective seawater desalination. The investigation was carried out experimentally, and the results show that the SSUCO significantly enhanced freshwater production compared to CSS. The results indicate that CTESS is a highly promising technique for seawater desalination in solar stills, providing notable advantages such as increased productivity, enhanced thermal efficiency, and significant economic and environmental benefits.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Xue Xia, Zhiqi Zhao, Wei Cai, Chuanxian Li, Fei Yang, Bo Yao, Guangyu Sun
Summary: The content of paraffin waxes affects the stability of W/O emulsions. Increasing the paraffin content improves emulsion stability but weakens the stability of asphaltene. Test temperature also has a significant impact on emulsion stability. Increasing the paraffin content at 30℃ benefits emulsion stability, while increasing the paraffin content at 15℃ helps to form a stronger wax crystal network structure and improve emulsion stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Energy & Fuels
Mohammad Monzavi, Zhaohui Chen, Amin Solouki, Jamal Chaouki
Summary: A unique catalyst, SiC foam @HZSM-5, was designed for the microwave-assisted pyrolysis process of waste hydrocarbons. The designed process showed high yield and quality of liquid oil products, with a considerable amount of olefins detected in the collected gases.
Article
Chemistry, Multidisciplinary
Al-Sayed A. Bakr, Yasser M. Moustafa, Mostafa M. H. Khalil, Mohamed M. Yehia, Eman A. Motawea
CANADIAN JOURNAL OF CHEMISTRY
(2015)
Article
Biotechnology & Applied Microbiology
H. A. Moubasher, A. K. Hegazy, N. H. Mohamed, Y. M. Moustafa, H. F. Kabiel, A. A. Hamad
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2015)
Article
Chemistry, Physical
Z. Abdeen, Y. M. M. Moustafa
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2016)
Article
Physics, Condensed Matter
R. Adel, T. Abdallah, Y. M. Moustafa, A. M. Al-sabagh, H. Talaat
SUPERLATTICES AND MICROSTRUCTURES
(2015)
Review
Chemistry, Multidisciplinary
A. Y. El Naggar, Y. M. Moustafa, S. Faramawy, A. M. Elfadly, E. S. Abdullah, M. A. Ebiad
ARABIAN JOURNAL OF CHEMISTRY
(2015)
Article
Green & Sustainable Science & Technology
Sherif A. Younis, Yasser M. Moustafa
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2017)
Article
Materials Science, Ceramics
Radwa A. El-Salamony, Heba M. Gobara, Sherif A. Younis, Yasser M. Moustafa
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2017)
Article
Chemistry, Multidisciplinary
M. S. El-Shahawi, W. Ahmad, G. I. Mohammed, Y. M. Moustafa, G. A. Al-Hazmi, A. A. El-Asmy
NEW JOURNAL OF CHEMISTRY
(2017)
Article
Chemistry, Physical
Heba H. El-Maghrabi, Ahmed Barhoum, Amr A. Nada, Yasser Mohamed Moustafa, Sara Mikhail Seliman, Ahmed M. Youssef, Mikhael Bechelany
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2018)
Article
Chemistry, Physical
Hager R. Ali, Heba H. El-Maghrabi, Fouad Zahran, Yasser Mohamed Moustafa
APPLIED SURFACE SCIENCE
(2017)
Article
Engineering, Environmental
Y. M. Moustafa, A. M. Al-Sabagh, S. A. Younis, Mostafa M. H. Khalil, M. O. Abdel-Salam
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Materials Science, Multidisciplinary
M. A. Deyab, Nermen H. Mohamed, Y. M. Moustafa
Article
Food Science & Technology
Nagwa M. Sidkey, Rawhiaa A. Arafa, Yasser M. Moustafa, Rania E. Morsi, Hai M. Elhateir
JOURNAL OF MICROBIOLOGY BIOTECHNOLOGY AND FOOD SCIENCES
(2017)
Article
Engineering, Environmental
Al-Sayed A. Bakra, Yasser M. Moustafaa, Eman A. Motaweaa, Mohamed M. Yehiab, Mostafa M. H. Khalil
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2015)
Article
Engineering, Environmental
Sherif A. Younis, Mona El-Sayed, Yasser M. Moustafa
ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL
(2017)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)
