Article
Energy & Fuels
Qian-Hui Zhao, Shuai Ma, Jian-Xun Wu, Wei-Feng Chang, Sheng-Fei Zhang, Xin-Ge Sun, Bing Zhou, Zeng-Min Lun, Keng H. Chung, Quan Shi
Summary: Most heavy crude oils undergo degradation and produce naphthenic acids, which are polar compounds that affect oil viscosity. The relationship between the molecular composition of naphthenic acids and oil viscosity is not well understood. This study analyzed a clean heavy oil with low heteroatom content but high naphthenic acid content. It was found that naphthenic acids with 2-3 rings and 15-35 carbon atoms are the dominant components, and the viscosity of the distillation fraction increases exponentially with boiling point.
Review
Energy & Fuels
Da Huo, Jianxun Wu, Han Li, Haiyan Huang, Keng H. Chung, Quan Shi
Summary: Calcium in crude oil can cause equipment fouling and catalyst deactivation, and its speciation in crude oil is of interest to the petroleum industry. This review summarizes the various forms of calcium found in crude oils, including inorganic and organic compounds. The progress in characterization methods and molecular composition of organic insoluble calcium-containing compounds is highlighted.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Review
Energy & Fuels
Eliane Barros, Paulo R. Filgueiras, Valdemar Lacerda Jr, Ryan P. Rodgers, Wanderson Romao
Summary: This article introduces the definition, formation mechanisms, and classification of naphthenic acids (NAs), as well as the challenges and phenomena related to the petrochemical industry. A bibliometric review shows an increase in the number of publications about NAs in recent years. The article also presents the primary extraction and characterization techniques of NAs, with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) being an excellent characterization method.
Article
Energy & Fuels
Hamed Izadi, Majid Baghdadi, Maryam Pazoki
Summary: In this study, hydrothermal catalytic upgrading of crude tire oil was conducted using Pd/Al2O3/Fe3O4 catalyst, effectively reducing sulfur and oxygen content and increasing the high heating value. The process optimization using Central Composite Design method improved the yield and quality of the produced fuel.
Article
Chemistry, Physical
Ning Li, Zhiqian Sun, Jinhui Sun, Wenchuan Liu, Luchen Wei, Teng Li, Bin Li, Zhenbo Wang
Summary: This study investigates the behavior of water droplets in acid-containing emulsions under different field strengths using molecular dynamics simulation, revealing the strong hydrogen bond formed between naphthenic acid and water that significantly affects the droplet movement.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Energy & Fuels
Hongbiao Du, Qi Yu, Guohua Liu, Jie Li, Jinglai Zhang, Wenjia Wang, Guoyi Duan, Yanghao Meng, Haijiao Xie
Summary: Hydrothermal liquefaction (HTL) has the potential to produce bio-oil from biomass waste, but further deoxygenation is needed due to the high oxygen content. This study investigated the catalytic deoxygenation performance of stearic acids in HTL bio-crude and found that (CuO)(10)-CeO2/gamma-Al2O3 exhibited the best performance. The proposed catalytic deoxygenation pathways involved carbon monoxide generation, in-situ hydrogen generation, short-chain fatty acid generation, and n-alkanes generation. DFT calculation showed that CuO-CeO2 reduced the activation energy, making it an effective method for upgrading HTL bio-crude.
Article
Energy & Fuels
Mohammad Fattahi Mehraban, Seyed Amir Farzaneh, Mehran Sohrabi
Summary: This study investigates the effect of salinity on oil/water interfacial interactions and identifies that low salinity water injection promotes the formation of water microdispersion at the oil/water interface.
Article
Energy & Fuels
Sharath Chandra Mahavadi, Mohammed Al Hamad, Shouxiang Mark Ma, Wael Abdallah
Summary: Interfacial tension (IFT) between crude oil and water is a critical property that affects multiphase flow in porous media. Measuring IFT in the laboratory is challenging, and tools for downhole measurement are currently unavailable. Existing reservoir simulators rely on empirical models that do not accurately account for crude oil chemistry. This study developed a potential model for downhole IFT measurement using crude oil samples from different fields. The model can improve saturation height function modeling, aid in field development planning and production strategies, and serve as a monitoring tool to prevent technical issues.
Article
Chemistry, Physical
Nihad Omer Hassan, Mohamed Challiwala, Dhallia Mamoun Beshir, Nimir O. Elbashir
Summary: This paper investigates the use of HZSM-5 zeolite catalyst to reduce the acidity of crude oil by removing naphthenic acids. The results show that the catalyst can effectively remove naphthenic acids via decarboxylation. The removal efficiency is enhanced with increasing temperature and residence time. Additionally, a kinetic model is developed to predict the performance of the catalyst.
Article
Multidisciplinary Sciences
Glenda Teran-Cuadrado, Camilo Ortega-Vega, Henrique Alves-de Brito, Diego Quinones-Murillo, Mayerlenis Jimenez Rojas
Summary: Oil spillage contamination is a common and challenging problem in marine ecosystems, and the use of nature-derived surfactants has been shown to be an attractive approach to restore affected sites. Nutrient addition is an efficient strategy to enhance oil biodegradation, and a commercial bio-catalytic agent showed excellent results in the biological remediation of crude oil-contaminated sites, achieving a high Total Petroleum Hydrocarbon removal efficiency.
Article
Chemistry, Physical
Huaping Li, Sharath Chandra Mahavadi, Adrian Anton, Simon Andersen
Summary: Interfacial tension (IFT) is crucial in petroleum engineering and can be influenced by surface-active components like naphthenic acids. A combination of bulk properties and the Gibbs-Langmuir model is suggested for more accurate estimation of IFT.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Yuwadee Plaola, Wanwipa Leangsiri, Kanokthip Pongsiriyakul, Worapon Kiatkittipong, Atthapon Srifa, Jun Wei Lim, Prasert Reubroycharoen, Kunlanan Kiatkittipong, Apiluck Eiad-ua, Suttichai Assabumrungrat
Summary: This study investigated the catalytic activity and stability of Ni-MoS2 supported on different catalyst supports for the deoxygenation of different feedstocks. The results showed that the catalytic performance was influenced by both the purity of the feedstock and the characteristics of the catalyst supports. NiMo/γ-Al2O3 exhibited a high resistance to impure feedstock and excellent stability.
Article
Engineering, Environmental
Um-e-Salma Amjad, Arshia Tajjamal, Anwar Ul-Hamid, Abrar Faisal, Lubna Sherin, Amna Mir, Maria Mustafa, Nabeel Ahmad, Murid Hussain, Young-Kwon Park, Syed Ammar Hussain Zaidi
Summary: The catalytic cracking of polystyrene pyrolysis oil was investigated using Nb2O5 and NiO/Nb2O5 catalysts in a fixed bed reactor. It was found that both catalysts were able to convert dimers in the pyrolysis oil to monomers, with slightly higher activity observed for the NiO/Nb2O5 catalyst. Increasing the temperature positively affected the yield of gases during the catalytic cracking process.
Article
Energy & Fuels
Madjid Meriem-Benziane, Benyebka Bou-Said, Bassam Gamal Nasser Muthanna, Ismail Boudissa
Summary: Corrosion damage at the elbows in the piping system during crude oil refining process is influenced by sodium chloride, calcium chloride, naphthenic acids, and sulfur compounds. Computational fluid dynamics helps predict corrosion behavior and offers solutions to improve operational safety.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Juan S. Ramirez-Pradilla, Cristian Blanco-Tirado, Marie Hubert-Roux, Pierre Giusti, Carlos Afonso, Marianny Y. Combariza
Summary: In this study, the performance of APPI, LDI, and ET-MALDI for analyzing PP-enriched extracts was compared. ET-MALDI produced a less complex spectrum with fewer ions, leading to improved signal resolution and mass accuracy in FT-ICR-MS.
Article
Energy & Fuels
Norshahidatul Akmar Mohd Shohaimi, Wan Azelee Wan Abu Bakar, Jafariah Jaafar
PETROLEUM SCIENCE AND TECHNOLOGY
(2017)
Article
Green & Sustainable Science & Technology
Norshahidatul Akmar Mohd Shohaimi, Jafariah Jaafar, Wan Azelee Wan Abu Bakar
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2015)
Article
Chemistry, Multidisciplinary
Norshahidatul Akmar Mohd Shohaimi, Wan Azelee Wan Abu Bakar, Jafariah Jaafar
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2014)
Article
Engineering, Chemical
A. H. Zamani, Norshahidatul Akmar Mohd Shohaimi, Salmiah Jamal Mat Rosid, Nor Hakimin Abdullah, Nurasmat Mohd Shukri
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2019)
Article
Energy & Fuels
Aunie Afifah Abdul Mutalib, Mohd Lokman Ibrahim, Juan Matmin, Muhd Firdaus Kassim, Mohd Sufri Mastuli, Yun Hin Taufiq-Yap, Norshahidatul Akmar Mohd Shohaimi, Aminul Islam, Yie Hua Tan, Noor Haida Mohd Kaus
BIOENERGY RESEARCH
(2020)
Article
Energy & Fuels
Norshahidatul Akmar Mohd Shohaimi, Nur Shahirah Mohd Halim, Ahmad Zamani Ab Halim, Nurasmat Mohd Shukri, Nor Hakimin Abdullah
PETROLEUM SCIENCE AND TECHNOLOGY
(2020)
Article
Biochemistry & Molecular Biology
Nor Hakimin Abdullah, Mazlan Mohamed, Norshahidatul Akmar Mohd Shohaimi, Azwan Mat Lazim, Ahmad Zamani Abdul Halim, Nurasmat Mohd Shukri, Mohammad Khairul Azhar Abdul Razab
Summary: Activated carbon was synthesized from local oil palm trunk biomass for the removal of synthetic dye from aqueous media. Optimization using response surface methodology achieved a high dye removal efficiency of 97.9% under specific conditions.
Article
Chemistry, Physical
Muhammad Amirrul Hakim Lokman NolHakim, Norshahidatul Akmar Mohd Shohaimi, Wan Nur Aini Wan Mokhtar, Mohd Lokman Ibrahim, Rose Fadzilah Abdullah
Summary: Beads and powder potassium hydroxide (KOH) and potassium carbonate (K2CO3) supported on alumina oxide (Al2O3) were successfully prepared via incipient wetness impregnation technique. Catalytic performance was evaluated via transesterification of waste cooking oil (WCO) to biodiesel, with optimal conditions of 1:12 oil-to-methanol molar ratio and 5 wt.% catalyst at 65 degrees C. The mesoporous size of the catalysts led to 86.8% and 77.3% yield of fatty acids methyl ester (FAME) at 2 hours' reaction time. Utilization of perforated hydrophilic materials (PHM) increased reusability of the catalyst up to 7 cycles.
